1026. 程序运行时间(15)

//1026. 程序运行时间(15)#include<stdio.h>int main(){  long long start,end,time;  int h,m,s;  scanf("%lld %lld",&start,&end);    time = (end-start + 50) / 100;  h = time/3600;  m = time%3600/60;  s = time%60;  printf("%02d:%02d:%02d",h,m,s);  return 0;}