区间翻转233
1 #include<bits/stdc++.h> 2 #define N 100005 3 #define LL long long 4 #define inf 0x3f3f3f3f 5 #define ls tr[x][0] 6 #define rs tr[x][1] 7 using namespace std; 8 inline int ra() 9 { 10 int x=0,f=1; char ch=getchar(); 11 while (ch<'0' || ch>'9') {if (ch=='-') f=-1; ch=getchar();} 12 while (ch>='0' && ch<='9') {x=x*10+ch-'0'; ch=getchar();} 13 return x*f; 14 } 15 struct SPLAY{ 16 bool rev[N]; 17 int fa[N],tr[N][2],root,v[N],size[N],w[N],cnt; 18 bool which(int x){return tr[fa[x]][1]==x;} 19 void update(int x){size[x]=size[ls]+size[rs]+1;} 20 void rotate(int x) 21 { 22 int y=fa[x],z=fa[y]; bool nx=which(x),ny=which(y); 23 tr[y][nx]=tr[x][!nx]; fa[tr[x][!nx]]=y; 24 fa[y]=x; tr[x][!nx]=y; fa[x]=z; 25 if (z) tr[z][ny]=x; update(y); update(x); 26 } 27 void splay(int x, int aim) 28 { 29 while (fa[x]!=aim) 30 { 31 int y=fa[x],z=fa[y]; 32 if (z==aim) rotate(x); 33 else if (which(x)==which(y)) rotate(y),rotate(x); 34 else rotate(x),rotate(x); 35 } 36 if (!aim) root=x; update(x); 37 } 38 void insert(int val) 39 { 40 int x=root; 41 for (;;) 42 { 43 if (val<v[x]) 44 if (!ls) {ls=val,fa[ls]=x,size[ls]=1; splay(ls,0); break;} else x=ls; 45 else if (!rs) {rs=val,fa[rs]=x,size[rs]=1; splay(rs,0); break;} else x=rs; 46 } 47 } 48 void pushdown(int x) 49 { 50 if (rev[x]) 51 { 52 swap(ls,rs); 53 rev[ls]^=1; rev[rs]^=1; 54 rev[x]=0; 55 } 56 } 57 int find(int x, int rank) 58 { 59 pushdown(x); 60 if (size[ls]+1==rank) return x; 61 else if (size[ls]>=rank) return find(ls,rank); 62 else return find(rs,rank-size[ls]-1); 63 } 64 void rever(int l, int r) 65 { 66 int x=find(root,l);int y=find(root,r+2); 67 splay(x,0); splay(y,x); 68 rev[tr[y][0]]^=1; 69 } 70 }T; 71 int n,m; 72 int main() 73 { 74 n=ra(); m=ra(); 75 for (int i=1; i<=n+2; i++) T.insert(i); 76 for (int i=1; i<=m; i++) 77 { 78 int x=ra(),y=ra(); 79 T.rever(x,y); 80 } 81 for (int i=2; i<=n+1; i++) 82 printf("%d ",T.find(T.root,i)-1); 83 }