View Compilation Error

0_0_34370800_17374.cpp: In function 'int main()':
0_0_34370800_17374.cpp:38:31: error: 'scanf_s' was not declared in this scope
     while (~scanf_s("%lld", &n))
                               ^
0_0_34370800_17374.cpp:51:18: error: 'INF' was not declared in this scope
         if (l == INF) printf("DC Qiang is unhappy.\n");
                  ^