include <iostream>

using namespace std; int main (){ long a,b; cin>>a>>b; cout<<a-b; }

include<bits/stdc++.h>

using namespace std; int main(){ long long n,a; cin>>n>>a; cout<<n-a; }

using System;

namespace Test { class Problem { public static void Main(string[] args) { long n = Convert.ToInt64(Console.ReadLine()); long m = Convert.ToInt64(Console.ReadLine()); Console.WriteLine(n-m); } } }

include <iostream>

using namespace std;

int main() { long n, m; cin >> n >> m; cout << n - m; return 0; }

include <iostream>

using namespace std; int main() { long long a,b; cin>>a>>b; cout<<a-b; }