Main.cc:1:1: error: 's' does not name a type s/stdc++.h> ^ Main.cc: In function 'int main()': Main.cc:6:1: error: 'cin' was not declared in this scope cin>>a>>b; ^ Main.cc:7:1: error: 'cout' was not declared in this scope cout<<(a*10+b)*(a*10+b)<