View Compilation Error

0_0_35989621_2941.cpp: In function 'int main()':
0_0_35989621_2941.cpp:6:23: error: 'scanf' was not declared in this scope
   scanf("%d%d", &n, &m);
                       ^
0_0_35989621_2941.cpp:21:28: error: 'printf' was not declared in this scope
     printf("%d\n", sq[1][n]);
                            ^