#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define endl '\n'

void Try() {
    int n, k; cin >> n >> k;
    cout << n - k << endl;
    
}

int32_t main() {
    ios_base::sync_with_stdio(0); cin.tie(0);

    int t = 1;
    //cin >> t;
    for (int i = 1; i <= t; i++) {
        Try();
    }

}