Programación Competitiva

#include <bits/stdc++.h>
using namespace std;

int main()
{
    int h, m, s, c;
    while(scanf("%2d%2d%2d%2d", &h, &m, &s, &c) == 4) {
        long long sum;
        sum = c*10+s*1000+m*60000+h*3600000;
        h = sum/8640000;
        sum %= 8640000;
        m = sum/86400;
        sum %= 86400;
        s = sum/864;
        sum %= 864;
        c = sum*100/864;
        printf("%d%02d%02d%02d\n", h, m, s, c);
    }
    return 0;
}