1)
#include <bits/stdc++.h>
#define ll long long
#define ull unsigned long long
using namespace std;
int main() {
ios::sync_with_stdio(0);
cin.tie(0);cout.tie(0);
int a,b;
cin >> a >> b;
cout << a - b;
}
2)
#include <bits/stdc++.h>
#define ll long long
#define ull unsigned long long
using namespace std;
int main() {
ios::sync_with_stdio(0);
cin.tie(0);cout.tie(0);
int a,b;
cin >> a >> b;
cout << (a + b) * (a - b);
}
3)
#include <bits/stdc++.h>
#define ll long long
#define ull unsigned long long
using namespace std;
int main() {
ios::sync_with_stdio(0);
cin.tie(0);cout.tie(0);
string name,ns,dc,pla;
cin >> name >> ns >> dc >> pla;
}
