View Compilation Error

0_0_24714103_32121.cpp: In function 'int main()':
0_0_24714103_32121.cpp:45:23: error: 'n' was not declared in this scope
   scanf("%lld %lld", &n, &k);
                       ^
0_0_24714103_32121.cpp:45:27: error: 'k' was not declared in this scope
   scanf("%lld %lld", &n, &k);
                           ^