Problems
Рівносторонній трикутник
include <bits/stdc++.h>
using namespace std;
define ll long long
int main() { ll a,b,c; cin>>a>>b>>c; if(a==b and b==c) { ll n=a*a; cout<<n<<endl; } else { cout<<"No"<<endl; } return 0; }// Very easy
using namespace std;
int main() { ll a,b,c; cin>>a>>b>>c; if(a==b and b==c) { ll n=a*a; cout<<n<<endl; } else { cout<<"No"<<endl; } return 0; }// Very easy