今年真是挂惨了。。。。。。
考场：
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T1 magic AAAAAAAAAA 
1 program _magic; 2 var 3 n:integer; 4 a:array[1..39,1..39] of integer; 5 i,j,ls1,ls2:integer; 6 begin 7 assign(input,'magic.in'); 8 reset(input); 9 assign(output,'magic.out'); 10 rewrite(output); 11 readln(n); 12 fillchar(a,sizeof(a),0); 13 ls1:=1; 14 ls2:=(n+1) div 2; 15 a[ls1,ls2]:=1; 16 for i:=2 to n*n do 17 begin 18 if (ls1=1)and(ls2<n) then 19 begin 20 ls1:=n; 21 ls2:=ls2+1; 22 end 23 else 24 if (ls2=n)and(ls1>1) then 25 begin 26 ls1:=ls1-1; 27 ls2:=1; 28 end 29 else if(ls1=1)and(ls2=n) then 30 begin 31 ls1:=ls1+1; 32 ls2:=ls2; 33 end 34 else if (ls1>1)and(ls2<n) then 35 begin 36 if a[ls1-1,ls2+1]=0 then 37 begin 38 ls1:=ls1-1; 39 ls2:=ls2+1; 40 end 41 else 42 begin 43 ls1:=ls1+1; 44 ls2:=ls2; 45 end; 46 end; 47 a[ls1,ls2]:=i; 48 end; 49 for i:=1 to n do 50 begin 51 for j:=1 to n-1 do 52 write(a[i,j],' '); 53 writeln(a[i,n]); 54 end; 55 close(input); 56 close(output); 57 end. |
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T2 message AAAAAAAAAA
1 program _message; 2 var 3 n:longint; 4 t:array[1..200020] of longint; 5 i,j:longint; 6 ord:array[1..200020] of longint; 7 vis:array[1..200020] of boolean; 8 ans:longint; 9 procedure check(x:longint); 10 var 11 i,j,k:longint; 12 begin 13 i:=x; 14 j:=0; 15 while not(vis[i]) do 16 begin 17 inc(j); 18 ord[j]:=i; 19 vis[i]:=true; 20 i:=t[i]; 21 end; 22 k:=1; 23 while (k<=j)and(ord[k]<>i) do 24 inc(k); 25 if k<=j then 26 begin 27 if ans>j+1-k then 28 ans:=j+1-k; 29 end; 30 end; 31 begin 32 assign(input,'message.in'); 33 reset(input); 34 assign(output,'message.out'); 35 rewrite(output); 36 readln(n); 37 ans:=maxlongint; 38 for i:=1 to n do 39 read(t[i]); 40 fillchar(vis,sizeof(vis),0); 41 for i:=1 to n do 42 if not(vis[i]) then 43 check(i); 44 writeln(ans); 45 close(input); 46 close(output); 47 end. |
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T3 landlords WWWWWWWWWWWWWWWWWWWT
1 program _landlords; 2 type 3 arr=array[1..23] of boolean; 4 card=record 5 a,b:integer; 6 end; 7 var 8 t,n:integer; 9 i,j,q,s,d:integer; 10 k,p:longint; 11 l,r:longint; 12 cards:array[1..23] of card; 13 queue:array[0..10000000] of longint; 14 len:array[0..10000000] of integer; 15 vis:array[0..10000000] of boolean; 16 ls1,ls2:arr; 17 function less(p,q:card):boolean; 18 begin 19 if p.a=0 then 20 begin 21 if q.a=0 then 22 exit(p.b<q.b) 23 else 24 exit(true); 25 end 26 else 27 begin 28 if q.a=0 then 29 exit(false); 30 if p.b<q.b then 31 exit(true); 32 if p.b>q.b then 33 exit(false); 34 exit(p.a<q.a); 35 end; 36 end; 37 procedure qsort(l,r:integer); 38 var 39 i,j:integer; 40 x,y:card; 41 begin 42 i:=l; 43 j:=r; 44 x:=cards[(l+r) div 2]; 45 repeat 46 while less(cards[i],x) do 47 inc(i); 48 while less(x,cards[j]) do 49 dec(j); 50 if i<=j then 51 begin 52 y:=cards[i]; 53 cards[i]:=cards[j]; 54 cards[j]:=y; 55 inc(i); 56 dec(j); 57 end; 58 until i>j; 59 if l<j then 60 qsort(l,j); 61 if i<r then 62 qsort(i,r); 63 end; 64 function hash(p:arr):longint; 65 var 66 i:integer; 67 ans:longint; 68 begin 69 ans:=0; 70 for i:=n downto 1 do 71 ans:=ans*2+ord(p[i]); 72 exit(ans); 73 end; 74 function inhash(p:longint):arr; 75 var 76 i:integer; 77 ans:arr; 78 begin 79 i:=1; 80 fillchar(ans,sizeof(ans),0); 81 while p>0 do 82 begin 83 ans[i]:=((p mod 2)=1); 84 p:=p div 2; 85 inc(i); 86 end; 87 exit(ans); 88 end; 89 procedure clear; 90 begin 91 l:=1; 92 r:=0; 93 end; 94 procedure inque(x:longint); 95 begin 96 inc(r); 97 queue[r]:=x; 98 vis[x]:=true; 99 end; 100 procedure deque; 101 begin 102 inc(l); 103 end; 104 function sum(x:integer):integer; 105 var 106 i,t:integer; 107 begin 108 t:=0; 109 for i:=1 to n do 110 if (cards[i].a=x)and(ls1[x]) then 111 t:=t+1; 112 exit(t); 113 end; 114 function find(p,x:integer):integer; 115 var 116 i:integer; 117 begin 118 for i:=p+1 to x do 119 if (cards[i].a=x)and(ls1[i]) then 120 exit(i); 121 end; 122 begin 123 assign(input,'landlords.in'); 124 reset(input); 125 assign(output,'landlords.out'); 126 rewrite(output); 127 readln(t,n); 128 for i:=1 to t do 129 begin 130 for j:=1 to n do 131 read(cards[j].a,cards[j].b); 132 qsort(1,n); 133 clear; 134 fillchar(ls1,sizeof(ls1),1); 135 for k:=0 to hash(ls1) do 136 begin 137 vis[k]:=false; 138 len[k]:=10000; 139 end; 140 inque(hash(ls1)); 141 len[hash(ls1)]:=0; 142 while l<=r do 143 begin 144 ls1:=inhash(queue[l]); 145 if hash(ls1)=0 then 146 begin 147 writeln(len[0]); 148 close(input); 149 close(output); 150 halt; 151 end; 152 deque; 153 for q:=1 to n do 154 if ls1[q] then 155 break; 156 if cards[q].a=0 then 157 begin 158 ls2:=ls1; 159 ls2[q]:=false; 160 if not(vis[hash(ls2)]) then 161 begin 162 inque(hash(ls2)); 163 len[hash(ls2)]:=len[hash(ls1)]+1; 164 end; 165 if (ls1[1])and(ls1[2])and(cards[1].a=0)and(cards[2].a=0) then 166 begin 167 ls2:=ls1; 168 ls2[1]:=false; 169 ls2[2]:=false; 170 if not(vis[hash(ls2)]) then 171 begin 172 inque(hash(ls2)); 173 len[hash(ls2)]:=len[hash(ls1)]+1; 174 end; 175 end; 176 end 177 else 178 begin 179 if sum(cards[q].a)>=4 then 180 begin 181 ls2:=ls1; 182 for s:=q to q+3 do 183 ls2[s]:=false; 184 if not(vis[hash(ls2)]) then 185 begin 186 inque(hash(ls2)); 187 len[hash(ls2)]:=len[hash(ls1)]+1; 188 end; 189 for s:=1 to n do 190 for d:=1 to n do 191 begin 192 if (cards[s].a=cards[q].a)or(cards[d].a=cards[q].a) then 193 continue; 194 if (not(ls1[s]))or(not(ls1[t])) then 195 continue; 196 if s=d then 197 continue; 198 ls2:=ls1; 199 ls2[s]:=false; 200 ls2[d]:=false; 201 ls2[q]:=false; 202 ls2[q+1]:=false; 203 ls2[q+2]:=false; 204 ls2[q+3]:=false; 205 if not(vis[hash(ls2)]) then 206 begin 207 inque(hash(ls2)); 208 len[hash(ls2)]:=len[hash(ls1)]+1; 209 end; 210 end; 211 for s:=1 to 13 do 212 for t:=1 to 13 do 213 begin 214 if s=t then 215 begin 216 if sum(s)<4 then 217 continue; 218 ls2:=ls1; 219 ls2[q]:=false; 220 ls2[q+1]:=false; 221 ls2[q+2]:=false; 222 ls2[q+3]:=false; 223 ls2[find(0,s)]:=false; 224 ls2[find(0,s)+1]:=false; 225 ls2[find(0,s)+2]:=false; 226 ls2[find(0,s)+3]:=false; 227 if not(vis[hash(ls2)]) then 228 begin 229 inque(hash(ls2)); 230 len[hash(ls2)]:=len[hash(ls1)]+1; 231 end; 232 end; 233 if (s=cards[q].a)or(t=cards[q].a) then 234 continue; 235 if (sum(s)<2)or(sum(t)<2) then 236 continue; 237 ls2:=ls1; 238 ls2[q]:=false; 239 ls2[q+1]:=false; 240 ls2[q+2]:=false; 241 ls2[q+3]:=false; 242 ls2[find(0,s)]:=false; 243 ls2[find(find(0,s),s)]:=false; 244 ls2[find(0,t)]:=false; 245 ls2[find(find(0,t),t)]:=false; 246 if not(vis[hash(ls2)]) then 247 begin 248 inque(hash(ls2)); 249 len[hash(ls2)]:=len[hash(ls1)]+1; 250 end; 251 end; 252 end; 253 if sum(cards[q].a)>=3 then 254 begin 255 ls2:=ls1; 256 for s:=q to q+2 do 257 ls2[s]:=false; 258 if not(vis[hash(ls2)]) then 259 begin 260 inque(hash(ls2)); 261 len[hash(ls2)]:=len[hash(ls1)]+1; 262 end; 263 for s:=1 to n do 264 begin 265 if cards[s].a=cards[q].a then 266 continue; 267 if not(ls1[s]) then 268 continue; 269 ls2:=ls1; 270 ls2[s]:=false; 271 ls2[q]:=false; 272 ls2[q+1]:=false; 273 ls2[q+2]:=false; 274 if not(vis[hash(ls2)]) then 275 begin 276 inque(hash(ls2)); 277 len[hash(ls2)]:=len[hash(ls1)]+1; 278 end; 279 end; 280 for s:=1 to 13 do 281 begin 282 if s=cards[q].a then 283 continue; 284 if sum(s)<2 then 285 continue; 286 ls2:=ls1; 287 ls2[q]:=false; 288 ls2[q+1]:=false; 289 ls2[q+2]:=false; 290 ls2[find(0,s)]:=false; 291 ls2[find(find(0,s),s)]:=false; 292 if not(vis[hash(ls2)]) then 293 begin 294 inque(hash(ls2)); 295 len[hash(ls2)]:=len[hash(ls1)]+1; 296 end; 297 end; 298 s:=cards[q].a; 299 while (s<=13)and(sum(s)>=3) do 300 inc(s); 301 if s<=13 then 302 begin 303 dec(s); 304 if s-cards[q].a>=1 then 305 begin 306 ls2:=ls1; 307 for d:=cards[q].a to s do 308 begin 309 ls2[find(0,d)]:=false; 310 ls2[find(find(0,d),d)]:=false; 311 ls2[find(find(find(0,d),d),d)]:=false; 312 if (d-cards[q].a>=1)and(not(vis[hash(ls2)])) then 313 begin 314 inque(hash(ls2)); 315 len[hash(ls2)]:=len[hash(ls1)]+1; 316 end; 317 end; 318 end; 319 end else 320 begin 321 if sum(1)>=3 then 322 begin 323 for d:=cards[q].a to 13 do 324 begin 325 ls2[find(0,d)]:=false; 326 ls2[find(find(0,d),d)]:=false; 327 ls2[find(find(find(0,d),d),d)]:=false; 328 if (d-cards[q].a>=1)and(not(vis[hash(ls2)])) then 329 begin 330 inque(hash(ls2)); 331 len[hash(ls2)]:=len[hash(ls1)]+1; 332 end; 333 end; 334 ls2[find(0,1)]:=false; 335 ls2[find(find(0,1),1)]:=false; 336 ls2[find(find(find(0,1),1),1)]:=false; 337 if not(vis[hash(ls2)]) then 338 begin 339 inque(hash(ls2)); 340 len[hash(ls2)]:=len[hash(ls1)]+1; 341 end; 342 end; 343 end; 344 end; 345 if sum(cards[q].a)>=2 then 346 begin 347 ls2:=ls1; 348 for s:=q to q+1 do 349 ls2[s]:=false; 350 if not(vis[hash(ls2)]) then 351 begin 352 inque(hash(ls2)); 353 len[hash(ls2)]:=len[hash(ls1)]+1; 354 end; 355 for s:=1 to 13 do 356 begin 357 if s=cards[q].a then 358 continue; 359 if sum(s)<3 then 360 continue; 361 ls2:=ls1; 362 ls2[q]:=false; 363 ls2[q+1]:=false; 364 ls2[find(0,s)]:=false; 365 ls2[find(find(0,s),s)]:=false; 366 ls2[find(find(find(0,s),s),s)]:=false; 367 if not(vis[hash(ls2)]) then 368 begin 369 inque(hash(ls2)); 370 len[hash(ls2)]:=len[hash(ls1)]+1; 371 end; 372 end; 373 s:=cards[q].a; 374 while (s<=13)and(sum(s)>=2) do 375 inc(s); 376 if s<=13 then 377 begin 378 dec(s); 379 if s-cards[q].a>=3 then 380 begin 381 ls2:=ls1; 382 for d:=cards[q].a to s do 383 begin 384 ls2[find(0,d)]:=false; 385 ls2[find(find(0,d),d)]:=false; 386 if (d-cards[q].a>=2)and(not(vis[hash(ls2)])) then 387 begin 388 inque(hash(ls2)); 389 len[hash(ls2)]:=len[hash(ls1)]+1; 390 end; 391 end; 392 end; 393 end else 394 begin 395 if (sum(1)>=2)and(13-cards[p].a+2>=3) then 396 begin 397 for d:=cards[q].a to 13 do 398 begin 399 ls2[find(0,d)]:=false; 400 ls2[find(find(0,d),d)]:=false; 401 if (d-cards[q].a>=2)and(not(vis[hash(ls2)])) then 402 begin 403 inque(hash(ls2)); 404 len[hash(ls2)]:=len[hash(ls1)]+1; 405 end; 406 end; 407 ls2[find(0,1)]:=false; 408 ls2[find(find(0,1),1)]:=false; 409 if not(vis[hash(ls2)]) then 410 begin 411 inque(hash(ls2)); 412 len[hash(ls2)]:=len[hash(ls1)]+1; 413 end; 414 end; 415 end; 416 for s:=1 to 13 do 417 for t:=1 to 13 do 418 begin 419 if s=t then 420 if (s=cards[q].a)or(t=cards[q].a) then 421 continue; 422 if (sum(s)<4)or(sum(t)<2) then 423 continue; 424 ls2:=ls1; 425 ls2[q]:=false; 426 ls2[q+1]:=false; 427 ls2[find(0,s)]:=false; 428 ls2[find(find(0,s),s)]:=false; 429 ls2[find(find(find(0,s),s),s)]:=false; 430 ls2[find(find(find(find(0,s),s),s),s)]:=false; 431 ls2[find(0,t)]:=false; 432 ls2[find(find(0,t),t)]:=false; 433 if not(vis[hash(ls2)]) then 434 begin 435 inque(hash(ls2)); 436 len[hash(ls2)]:=len[hash(ls1)]+1; 437 end; 438 end; 439 end; 440 if sum(cards[q].a)>=1 then 441 begin 442 ls2:=ls1; 443 ls2[q]:=false; 444 if not(vis[hash(ls2)]) then 445 begin 446 inque(hash(ls2)); 447 len[hash(ls2)]:=len[hash(ls1)]+1; 448 end; 449 for s:=1 to 13 do 450 begin 451 if s=cards[q].a then 452 continue; 453 if sum(s)<3 then 454 continue; 455 ls2:=ls1; 456 ls2[q]:=false; 457 ls2[find(0,s)]:=false; 458 ls2[find(find(0,s),s)]:=false; 459 ls2[find(find(find(0,s),s),s)]:=false; 460 if not(vis[hash(ls2)]) then 461 begin 462 inque(hash(ls2)); 463 len[hash(ls2)]:=len[hash(ls1)]+1; 464 end; 465 end; 466 s:=cards[q].a; 467 while (s<=13)and(sum(s)>=1) do 468 inc(s); 469 if s<=13 then 470 begin 471 dec(s); 472 if s-cards[q].a>=5 then 473 begin 474 ls2:=ls1; 475 for d:=cards[q].a to s do 476 begin 477 ls2[find(0,d)]:=false; 478 if (d-cards[q].a>=5)and(not(vis[hash(ls2)])) then 479 begin 480 inque(hash(ls2)); 481 len[hash(ls2)]:=len[hash(ls1)]+1; 482 end; 483 end; 484 end; 485 end else 486 begin 487 if (sum(1)>=1)and(13-cards[p].a+2>=5) then 488 begin 489 for d:=cards[q].a to 13 do 490 begin 491 ls2[find(0,d)]:=false; 492 if (d-cards[q].a>=5)and(not(vis[hash(ls2)])) then 493 begin 494 inque(hash(ls2)); 495 len[hash(ls2)]:=len[hash(ls1)]+1; 496 end; 497 end; 498 ls2[find(0,1)]:=false; 499 if not(vis[hash(ls2)]) then 500 begin 501 inque(hash(ls2)); 502 len[hash(ls2)]:=len[hash(ls1)]+1; 503 end; 504 end; 505 end; 506 for s:=1 to 13 do 507 for t:=1 to 13 do 508 begin 509 if s=t then 510 if (s=cards[q].a)or(t=cards[q].a) then 511 continue; 512 if (sum(s)<4)or(sum(t)<1) then 513 continue; 514 ls2:=ls1; 515 ls2[q]:=false; 516 ls2[find(0,s)]:=false; 517 ls2[find(find(0,s),s)]:=false; 518 ls2[find(find(find(0,s),s),s)]:=false; 519 ls2[find(find(find(find(0,s),s),s),s)]:=false; 520 ls2[find(0,t)]:=false; 521 if not(vis[hash(ls2)]) then 522 begin 523 inque(hash(ls2)); 524 len[hash(ls2)]:=len[hash(ls1)]+1; 525 end; 526 end; 527 end; 528 end; 529 530 end; 531 end; 532 close(input); 533 close(output); 534 end. |
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T4 stone AAWWWAAAAW
1 program _stone; 2 type 3 len=record 4 l,r:longint; 5 long:longint; 6 end; 7 var 8 l,n,m:longint; 9 dis:array[1..50050] of len; 10 point:array[1..50050,0..2] of longint; 11 pos:array[1..50050] of longint; 12 i,j,k,j1,k1:longint; 13 ans:longint; 14 procedure makeheap(x:longint); 15 var 16 p,q:longint; 17 ls:len; 18 begin 19 p:=x; 20 while p*2<=n do 21 begin 22 if (dis[p*2+1].long<dis[p*2].long)and(p*2+1<=n) then 23 q:=p*2+1 24 else 25 q:=p*2; 26 if dis[p].long<=dis[q].long then 27 break; 28 pos[dis[p].l]:=q; 29 pos[dis[q].l]:=p; 30 ls:=dis[p]; 31 dis[p]:=dis[q]; 32 dis[q]:=ls; 33 p:=q; 34 end; 35 end; 36 procedure deltop; 37 var 38 ls:len; 39 begin 40 pos[dis[n].l]:=1; 41 dis[1]:=dis[n]; 42 dec(n); 43 makeheap(1); 44 end; 45 procedure change(x,y,l,r:longint); 46 begin 47 dis[x].long:=y; 48 dis[x].l:=l; 49 dis[x].r:=r; 50 while x>=1 do 51 begin 52 makeheap(x); 53 x:=x div 2; 54 end; 55 end; 56 begin 57 assign(input,'stone.in'); 58 reset(input); 59 assign(output,'stone.out'); 60 rewrite(output); 61 readln(l,n,m); 62 pos[1]:=1; 63 point[1,0]:=0; 64 point[1,1]:=0; 65 point[1,2]:=1; 66 point[n+2,0]:=n-1; 67 point[n+2,1]:=l; 68 point[n+2,2]:=0; 69 for i:=2 to n+1 do 70 begin 71 readln(point[i,1]); 72 point[i,0]:=i-1; 73 point[i,2]:=i+1; 74 dis[i-1].l:=i-1; 75 dis[i-1].r:=i; 76 dis[i-1].long:=point[i,1]-point[i-1,1]; 77 pos[i-1]:=i-1; 78 end; 79 dis[n+1].l:=n+1; 80 dis[n+1].r:=n+2; 81 dis[n+1].long:=l-point[n+1,1]; 82 pos[n+1]:=n+1; 83 n:=n+1; 84 for i:=n downto 1 do 85 makeheap(i); 86 for i:=1 to m do 87 begin 88 j:=dis[1].l; 89 k:=dis[1].r; 90 j1:=point[j,0]; 91 k1:=point[k,2]; 92 deltop; 93 if j1=0 then 94 change(pos[k],point[k1,1]-point[j,1],j,k1) 95 else if k1=0 then 96 change(pos[j1],point[k,1]-point[j1,1],j1,k) 97 else if (point[j,1]-point[j1,1]<point[k1,1]-point[k,1]) then 98 change(pos[j1],point[k,1]-point[j1,1],j1,k) 99 else 100 change(pos[k],point[k1,1]-point[j,1],j,k1); 101 end; 102 ans:=$3f3f3f3f; 103 for i:=1 to n do 104 if ans>dis[i].long then 105 ans:=dis[i].long; 106 writeln(ans); 107 close(input); 108 close(output); 109 end. |
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T5 substring MMMMMMMMMM
1 program substring; 2 var 3 n,m,k:longint; 4 a,b:ansistring; 5 ans:array[0..1000,0..200,0..200] of longint; 6 i,j,p,q,r:longint; 7 function min(x,y:longint):longint; 8 begin 9 if x<y then exit(x) else exit(y); 10 end; 11 begin 12 assign(input,'substring.in'); 13 reset(input); 14 assign(output,'substring.out'); 15 rewrite(output); 16 readln(n,m,k); 17 readln(a); 18 readln(b); 19 fillchar(ans,sizeof(ans),0); 20 for i:=0 to n do 21 ans[i,0,0]:=1; 22 for i:=1 to n do 23 for j:=1 to min(i,k) do 24 for p:=1 to min(i,m) do 25 begin 26 ans[i,j,p]:=ans[i-1,j,p]; 27 q:=i; 28 r:=p; 29 while (q>=1)and(r>=1)and(a[q]=b[r]) do 30 begin 31 ans[i,j,p]:=(ans[i,j,p]+ans[q-1,j-1,r-1]) mod 1000000007; 32 dec(q); 33 dec(r); 34 end; 35 end; 36 writeln(ans[n,k,m]); 37 close(input); 38 close(output); 39 end. |
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T6 transport AAAAAATTTTTEETTTTEEET
1 program _transport; 2 var 3 n,m:longint; 4 a,b,t:array[1..600000] of longint; 5 u,v:array[1..300000] of longint; 6 w:array[1..300000] of longint; 7 vis:array[1..300000] of boolean; 8 father:array[1..300000] of longint; 9 i,j,k,l,p:longint; 10 ans:int64; 11 function max(x,y:longint):longint; 12 begin 13 if x>y then exit(x) else exit(y); 14 end; 15 function min(x,y:longint):longint; 16 begin 17 if x<y then exit(x) else exit(y); 18 end; 19 procedure qsort(l,r:longint); 20 var 21 i,j,x,y:longint; 22 begin 23 i:=l; 24 j:=r; 25 x:=a[(l+r) div 2]; 26 repeat 27 while a[i]<x do 28 inc(i); 29 while a[j]>x do 30 dec(j); 31 if i<=j then 32 begin 33 y:=a[i]; a[i]:=a[j]; a[j]:=y; 34 y:=b[i]; b[i]:=b[j]; b[j]:=y; 35 y:=t[i]; t[i]:=t[j]; t[j]:=y; 36 inc(i); dec(j); 37 end; 38 until i>j; 39 if l<j then 40 qsort(l,j); 41 if i<r then 42 qsort(i,r); 43 end; 44 function checkline:boolean; 45 var 46 i:longint; 47 begin 48 if (a[1]<>1)or(b[1]<>2) then 49 exit(false); 50 if (a[2*n-2]<>n)or(b[2*n-2]<>n-1) then 51 exit(false); 52 for i:=2 to n-2 do 53 if ((a[i*2-2]<>i)or(b[i*2-2]<>i+1))and((a[i*2-1]<>i)or(b[i*2-1]<>i+1)) then 54 exit(false); 55 exit(true); 56 end; 57 function find(data,l,r:longint):longint; 58 var 59 mid:longint; 60 begin 61 mid:=(l+r) div 2; 62 if (a[mid]>=data)and(a[mid-1]>=data) then 63 exit(find(data,l,mid-1)); 64 if (a[mid]<data) then 65 exit(find(data,mid+1,r)); 66 if (a[mid]=data)and((mid=1)or(a[mid-1]<data)) then 67 exit(mid); 68 end; 69 procedure maketree(x:longint); 70 var 71 i,j,k:longint; 72 begin 73 vis[x]:=true; 74 j:=find(x,1,2*n-2); 75 if x=n then 76 k:=2*n-2 77 else 78 k:=find(x+1,1,2*n-2); 79 for i:=j to k-1 do 80 begin 81 if not(vis[b[i]]) then 82 begin 83 father[b[i]]:=x; 84 maketree(b[i]); 85 end; 86 end; 87 end; 88 function findfather(x,y:longint):longint; 89 var 90 i,lsx,lsy,sum:longint; 91 begin 92 fillchar(vis,sizeof(vis),0); 93 lsx:=x; 94 lsy:=y; 95 while x<>0 do 96 begin 97 vis[x]:=true; 98 x:=father[x]; 99 end; 100 while y<>0 do 101 begin 102 if vis[y] then 103 break; 104 y:=father[y]; 105 end; 106 sum:=0; 107 while lsx<>y do 108 begin 109 inc(sum,w[lsx]); 110 lsx:=father[lsx]; 111 end; 112 while lsy<>y do 113 begin 114 inc(sum,w[lsy]); 115 lsy:=father[lsy]; 116 end; 117 exit(sum); 118 end; 119 begin 120 assign(input,'transport.in'); 121 reset(input); 122 assign(output,'transport.out'); 123 rewrite(output); 124 readln(n,m); 125 for i:=1 to n-1 do 126 begin 127 readln(a[i],b[i],t[i]); 128 t[i+n-1]:=t[i]; 129 a[i+n-1]:=b[i]; 130 b[i+n-1]:=a[i]; 131 end; 132 for i:=1 to m do 133 readln(u[i],v[i]); 134 qsort(1,2*n-2); 135 if checkline then 136 begin 137 fillchar(w,sizeof(w),0); 138 w[1]:=t[1]; 139 w[n-1]:=t[2*n-2]; 140 for i:=2 to n-2 do 141 begin 142 if (a[i*2-2]=i)and(b[i*2-2]=i+1) then 143 w[i]:=t[i*2-2] 144 else 145 w[i]:=t[i*2-1]; 146 end; 147 ans:=$3f3f3f3f; 148 for i:=1 to n-1 do 149 begin 150 l:=0; 151 for j:=1 to m do 152 begin 153 p:=0; 154 for k:=u[j] to v[j]-1 do 155 begin 156 if k<>i then 157 p:=p+w[k]; 158 end; 159 if l<p then 160 l:=p; 161 end; 162 if ans>l then 163 ans:=l; 164 end; 165 writeln(ans); 166 end 167 else 168 begin 169 fillchar(vis,sizeof(vis),0); 170 fillchar(father,sizeof(father),0); 171 maketree(1); 172 fillchar(w,sizeof(w),0); 173 for i:=1 to 2*n-2 do 174 if father[a[i]]=b[i] then 175 w[a[i]]:=t[i]; 176 ans:=$3f3f3f3f; 177 for k:=2 to n do 178 begin 179 j:=0; 180 l:=w[k]; 181 w[k]:=0; 182 for i:=1 to m do 183 begin 184 if findfather(u[i],v[i])>j then 185 j:=findfather(u[i],v[i]); 186 end; 187 if ans>j then 188 ans:=j; 189 w[k]:=l; 190 end; 191 writeln(ans); 192 end; 193 close(input); 194 close(output); 195 end. |
其中大部分是不该失分的，正常水平应该在100+100+80（看常数，COGS上AC）+100+100+80=560......