#include <bits/stdc++.h>
using namespace std;
#define all(x) (x).begin(), (x).end()
using ll = long long;
void solve()
{

    int a, b;
    cin >> a >> b;
    cout << a - b << endl;
}
int main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);
  
        solve();

    return 0;
}