func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int a;     cin >> a;     switch (a) {       case 0:         puts( 15 );         break;       case 1:         puts( 14 );         break;       case 2:         puts( 12 );         break;       case 3:         puts( 13 );         break;       case 4:         puts( 8 );         break;       case 5:         puts( 9 );         break;       case 6:         puts( 10 );         break;       case 7:         puts( 11 );         break;       case 8:         puts( 0 );         break;       case 9:         puts( 1 );         break;       case 10:         puts( 2 );         break;       case 11:         puts( 3 );         break;       case 12:         puts( 4 );         break;       case 13:         puts( 5 );         break;       case 14:         puts( 6 );         break;       case 15:         puts( 7 );         break;     }   }   