View Compilation Error

0_0_29057004_8732.cpp: In function 'long long int phi(long long int)':
0_0_29057004_8732.cpp:4:5: error: 'LL' was not declared in this scope
     LL i,res = x;
     ^
0_0_29057004_8732.cpp:5:9: error: 'i' was not declared in this scope
     for(i = 2;i*i<=x;i++)
         ^
0_0_29057004_8732.cpp:8:6: error: 'res' was not declared in this scope
      res = res / i * (i-1);
      ^
0_0_29057004_8732.cpp:13:6: error: 'res' was not declared in this scope
      res = res/x *(x-1);
      ^
0_0_29057004_8732.cpp:14:10: error: 'res' was not declared in this scope
  return  res;
          ^