#include <iostream>
#include <string>
#include <sstream> 
using namespace std;

int myStoi(string str){
   stringstream aas(str);
   int N;
   aas<<str;
   aas>>N;
   return N;
}
int main(){
    int n,counter=0;
    cout << "Enter n? ";
    cin >> n;
    cout << "Enter hours worked? ";
    for (int i = 0; i < n; ++i){
        string temp;
        cin >> temp;
        counter += myStoi(temp.substr(0,2))*60 + myStoi(temp.substr(3));
    }
    cout << counter << " min = ";
    if (counter/60 > 0){
        cout << counter/60 << " h";

        if (counter%60 != 0){
            cout << " " << counter%60 << " min\n";
        }
    } else {
        cout << counter%60 << " min\n";
    }
}