View Compilation Error

0_0_33980222_25347.cpp: In function 'bool judge(int)':
0_0_33980222_25347.cpp:6:23: error: 'scanf' was not declared in this scope
         scanf("%d", &y);
                       ^
0_0_33980222_25347.cpp: In function 'int main()':
0_0_33980222_25347.cpp:19:19: error: 'scanf' was not declared in this scope
     scanf("%d", &T);
                   ^
0_0_33980222_25347.cpp:23:27: error: 'printf' was not declared in this scope
             printf("YES\n");
                           ^
0_0_33980222_25347.cpp:25:26: error: 'printf' was not declared in this scope
             printf("NO\n");
                          ^