运行 ID: 68202

Main.cc: In function ‘int main()’:
Main.cc:10:8: error: ‘a’ was not declared in this scope
   cin>>a>>b>>c;
        ^
Main.cc:10:14: error: ‘c’ was not declared in this scope
   cin>>a>>b>>c;
              ^
Main.cc:16:38: error: ‘d’ was not declared in this scope
                 long long  y=min(b,k+d); 
                                      ^