View Compilation Error

0_0_18871431_30824.cpp: In function 'LL query2(LL)':
0_0_18871431_30824.cpp:58:41: error: 'ret' was not declared in this scope
  for (LL i = v; i <= n; i += (i & -i))++ret;
                                         ^
0_0_18871431_30824.cpp:59:9: error: 'ret' was not declared in this scope
  return ret;
         ^