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题目

纯送分题

代码

#include<iostream>
#include<stdio.h>>
using namespace std;

int main()
{
	long long x;
	cin >> x;
	int mods = 24*60*60*1000;//1 day's ms
	int mods_h = 60*60*1000;//1 hour's ms
	int mods_m = 60*1000;
	int mods_s = 1000;
	long long ans = x%mods;//<1 day
	int h = ans/mods_h;
	int m = (ans-h*mods_h)/mods_m;
	int s = (ans-h*mods_h-m*mods_m)/mods_s;
	printf("%02d:%02d:%02d\n",h,m,s);
	return 0;	
}