Aeee o doyul qohum

include <bits/stdc++.h>

using namespace std; int main() { int a,b,c,d; cin>>a>>b>>c>>d; if(a==b and b==c and c==d and a==c and a==d and b==d ) cout<<a*4; else cout<<"No"; } why is this 50 %

omar 64 are you japan????