View Compilation Error

0_0_36551735_11696.cpp: In function 'int main()':
0_0_36551735_11696.cpp:69:18: error: 'scanf' was not declared in this scope
     scanf("%d",&Q);
                  ^
0_0_36551735_11696.cpp:103:41: error: 'printf' was not declared in this scope
         printf("Case %d: %d\n",k,match());
                                         ^