腾讯马拉松
水~~
注意是12小时一周期！！！！！！！！！！！！！！！！！！！！！！！
View Code
1 #include<stdio.h> 2 #include<string.h> 3 struct node{ 4 int h,m,s,all; 5 }; 6 node now,pre,tmp; 7 int main(){ 8 int n; 9 scanf("%d",&n); 10 while( n-- ){ 11 scanf("%d:%d:%d",&now.h,&now.m,&now.s); 12 now.all = now.h*3600+now.m*60+now.s; 13 scanf("%d:%d:%d",&tmp.h,&tmp.m,&tmp.s); 14 while( tmp.h>=12 ){ 15 tmp.h -= 12; 16 } 17 tmp.all = tmp.h*3600+tmp.m*60+tmp.s; 18 int tot; 19 tot = now.all - tmp.all; 20 if( tot >=0 ){ 21 pre.h = tot/3600,tot = tot - pre.h*3600; 22 pre.m = tot/60, tot = tot - pre.m*60; 23 pre.s = tot; 24 printf("%02d:%02d:%02d\n",pre.h,pre.m,pre.s); 25 } 26 else{ 27 tot=-tot; 28 pre.h = tot/3600,tot = tot - pre.h*3600; 29 pre.m = tot/60, tot = tot - pre.m*60; 30 pre.s = tot; 31 now.h=12,now.m=0,now.s=0; 32 if( now.s<pre.s ){ 33 now.m = 59; 34 now.h = 11; 35 now.s = 60-pre.s; 36 } 37 else {} 38 if( now.m<pre.m ){ 39 now.m += 60; 40 now.m -= pre.m; 41 now.h --; 42 } 43 else{ 44 now.m-=pre.m; 45 } 46 now.h-=pre.h; 47 48 printf("%02d:%02d:%02d\n",now.h,now.m,now.s); 49 } 50 } 51 return 0; 52 }