//Решение задачи "Электронные часы-2", Хвесюк Екатерина, 9 класс
#include <iostream>
using namespace std;
int main ()
{
int n, h, m, s, d;
h = 00;
m = 00;
s = 00;
cin>>n;
h = n / 3600;
d = h / 24;
if (n / 3600 >= 24)
h = h - 24 * d;
n = n - (n / 3600 * 3600);
m = n / 60;
n = n - (m * 60);
s = n;
if (m/10==0 && s/10==0)
cout<<h<<":"<<0<<m<<":"<<0<<s;
if (m/10!=0 && s/10!=0)
cout<<h<<":"<<m<<":"<<s;
if (m/10==0 && s/10!=0)
cout<<h<<":"<<0<<m<<":"<<s;
if (m/10!=0 && s/10==0)
cout<<h<<":"<<m<<":"<<0<<s;
return 0;
}
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