#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;
}