蓝桥杯时间显示
#include<iostream>
using namespace std;
typedef long long LL;
int main()
{
LL sum ;
cin >> sum;
sum /= 1000;
sum %= 86400;
int h = sum / 3600;
int s = sum % 60;
int m = (sum % 3600 - s) / 60;
printf("%02d:%02d:%02d",h,m,s);//自动补零
}
