#include <iostream>
#include <math.h>

using std::cout;
using std::cin;

int main (){

    int hora1, min1, hora2, min2, duracaoh, duracaom;

    cout << " Informe a hora e o minuto inicial: ";
    cin >> hora1 >> min1;
    cout << " Informe a hora e o minuto final: ";
    cin >> hora2 >> min2;

    cout << "\n Tempo inicial: "<<hora1<<":"<<min1;
    cout << "\n Tempo final "<<hora2<<":"<<min2;

    duracaoh = hora1-hora2;
    duracaom = min1-min2;

    cout << "\n";

return 0;
}