【題目敘述】https://atcoder.jp/contests/nomura2020/tasks/nomura2020_a
#include <iostream>
using namespace std;
int h1, m1, h2, m2, k, ans;
int main() {
cin >> h1 >> m1 >> h2 >> m2 >> k;
ans = (h2-h1) * 60;
ans += m2-m1;
ans -= k;
cout << ans << "\n";
}