1026. 程序运行时间(15)

#include<stdio.h>
#define CLK_TCK 100
//#include<time.h>
  int main(){
    int C1,C2;
    scanf("%d %d",&C1,&C2);
    int sec = (C2 - C1);
    if (sec % 100 >= 50){
      sec += 100;
    }
    sec /= 100;
    int h =  sec / 3600;
    sec %= 3600;
    int m = sec / 60;
    int s = sec % 60;
    printf("%02d:%02d:%02d",h,m,s);
    return 0;
  }