#include<iostream>

using namespace std;

int main(){
  int a,t;
  int h=10, m=0;
  cin >> a;
  t=(a/100.0)*60;
  m+=t;
  h+=m/60;
  m%=60;
  h%=24;
  if(m<10){
    cout << h << ":0" << m << endl;
  }else{
    cout << h << ":" << m << endl;

  }
  return 0;
}