View Compilation Error

0_0_16244141_27774.cpp: In function 'bool find(int, int, int, int)':
0_0_16244141_27774.cpp:73:19: error: 'i' was not declared in this scope
  return (c[t].son[i - p] > 0 && find(c[t].son[1 - p], dep - 1, 2 * s + 1 - p, no)); 
                   ^