View Compilation Error

0_0_36977978_30523.cpp: In function 'int main()':
0_0_36977978_30523.cpp:77:19: error: 'num' was not declared in this scope
             if(vv[num][0] > x) printf("-1\n");//同余意义下所有相等的数的原数都比他大
                   ^