打表学神限时返场&&%￥#只要九九八

魈凯KBS  •  5个月前

include <bits/stdc++.h>

using namespace std; int main() { 

int a,s;
cin>>a>>s; 
cout<<2*s-a<<endl;
return 0;

}

Comments:

[错误]：Use of undeclared identifier 'bits/stdc++.h [错误]： Expected unqualified-id [错误]：Use of undeclared identifier 'cin' [错误]： Use of undeclared identifier 'cout' [错误]： Use of undeclared identifier 'endl'

mqk1  •  15天前