func_code_string: #include <bits/stdc++.h>   using namespace std;   map<int, bool> mp;   int main() {     int n;     cin >> n;     for (int i = 0; i < n; i++) {       int a;       cin >> a;       mp[a] = 1;     }     for (int i = 0; i < 1010; i++) {       if (mp[i] && mp[i + 1] && mp[i + 2]) {         cout <<  YES  << endl;         return 0;       }     }     cout <<  NO  << endl;   }   