View Compilation Error

0_0_36539933_22405.cpp: In function 'void merge(int, int)':
0_0_36539933_22405.cpp:22:5: error: expected primary-expression before ')' token
  if()
     ^
0_0_36539933_22405.cpp:23:1: error: expected primary-expression before '}' token
 }
 ^
0_0_36539933_22405.cpp: In function 'int main()':
0_0_36539933_22405.cpp:27:25: error: 'scanf_s' was not declared in this scope
  scanf_s("%d %d", &n, &k);
                         ^