foo.cpp: In function 'void dit(int)':
foo.cpp:34:23: error: 'scanf' was not declared in this scope
     scanf("%d%d",&P,&Q);
                       ^
foo.cpp:62:37: error: 'printf' was not declared in this scope
     printf("Case #%d: %d\n",kase,mst);
                                     ^
foo.cpp: In function 'int main()':
foo.cpp:66:18: error: 'scanf' was not declared in this scope
     scanf("%d",&T);
                  ^