#include <iostream>
#include <bits/stdc++.h>
using namespace std;
const int N=1e7+10;
const int INF=0x3f3f3f3f;
int main()
{
	int t,shi,fen;
	double l,s,zzt;
	cin>>t>>l>>s;
	fen=t%100;
	shi=t/100;
	zzt=l/s*60;
	while(zzt>=60)
	{
		zzt-=60;
		shi+=1;
		if(shi>=24)
		{
			shi=0;
		}
	}
	fen+=zzt;
	if(fen>=60)
	{
		shi+=(fen/60);
		fen-=(fen/60)*60;
	}
	if(shi>=24)
	{
		shi=0;
		shi+=(fen/60);
	}
	cout<<shi<<"-"<<fen;
}

#include<iomanip>//setprecision setw
#include<stdio.h>//scanf printf
#include<math.h>//ceil floor fabs sqrt round pow
#include<string>//string
#include<string.h>//memset
#include<sstream>//stringsream
#include<algorithm>//min max
using namespace std;
int n,t;
double a,b;
int main(){
	cin>>n>>a>>b;
	t=n/100*60+n%100+a/b*60;
	cout<<t/60%24<<"-"<<t%60;
	return 0;
}

#include<iostream>//cin cout
#include<iomanip>//setprecision setw
#include<stdio.h>//scanf printf
#include<math.h>//ceil floor fabs sqrt round pow
#include<string>//string
#include<string.h>//memset
#include<sstream>//stringsream
#include<algorithm>//min max
using namespace std;
int n,t;
double a,b;
int main(){
	cin>>n>>a>>b;
	t=n/100*60+n%100+a/b*60;
	cout<<t/60%24<<"-"<<t%60;
	return 0;
}