View Compilation Error

0_0_33757605_9506.cpp: In function 'int main()':
0_0_33757605_9506.cpp:79:13: error: 'in' was not declared in this scope
  int n = in(), m = in();
             ^
0_0_33757605_9506.cpp:81:9: error: 'm' was not declared in this scope
  while (m--) {
         ^
0_0_33757605_9506.cpp:84:16: error: 'x' was not declared in this scope
   case 0:split(x, y); printf("%d\n", s[y]); break;
                ^
0_0_33757605_9506.cpp:84:19: error: 'y' was not declared in this scope
   case 0:split(x, y); printf("%d\n", s[y]); break;
                   ^