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

#define ll long long
#define endl '\n'
#define print(v) for(auto e:v) cout<<e<<" "; cout<<endl;

void solve() {
    int a,b;cin >>a >>b;
    cout << (a - b) << endl;
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    int t = 1;// cin >> t;
    while(t--){
        solve();
    }
    return 0;
}