View Compilation Error

0_0_26876807_25024.cpp: In function 'int main()':
0_0_26876807_25024.cpp:9:30: error: 'scanf' was not declared in this scope
     while(scanf("%d %d",&N,&M))
                              ^
0_0_26876807_25024.cpp:16:27: error: 'printf' was not declared in this scope
             printf("YES\n");
                           ^
0_0_26876807_25024.cpp:18:33: error: 'printf' was not declared in this scope
             printf("POOR Haha\n");
                                 ^