func_code_string: #include <bits/stdc++.h>   using namespace std;   const int _1e5 = 100000;   const int _1e7 = 10000000;   const int _1e9 = 1000000000;   template <typename A, typename B>   ostream& operator<<(ostream& str, const pair<A, B>& p) {     return str <<  (  << p.first <<  ,   << p.second <<  ) ;   }   template <typename T>   ostream& operator<<(ostream& str, const vector<T>& v) {     str <<  [ ;     for (const auto& n : v) str << n <<  ,  ;     str <<  ] ;     return str;   }   template <typename T>   ostream& operator<<(ostream& str, const set<T>& v) {     str <<  { ;     for (const auto& n : v) {       str << n <<  ,  ;     }     str <<  } ;     return str;   }   template <typename K, typename V>   ostream& operator<<(ostream& str, const unordered_map<K, V>& v) {     str <<  { ;     for (const auto& p : v) {       str << p.first <<   =>   << p.second <<  ,  ;     }     str <<  } ;     return str;   }   int main() {     ios_base::sync_with_stdio(false);     cout.setf(std::ios::fixed);     cout.precision(12);     int n;     cin >> n;     string a;     cin >> a;     vector<int> f(10);     f[0] = 0;     for (int i = 1; i <= 9; ++i) {       cin >> f[i];     }     int left_start = -1;     for (int i = 0; i < a.size(); ++i) {       int digit = a[i] -  0 ;       if (f[digit] > digit) {         left_start = i;         break;       }     }     if (left_start == -1) {       cout << a << endl;       return 0;     }     while (true) {       if (left_start >= a.size()) {         break;       }       int digit = a[left_start] -  0 ;       if (f[digit] < digit) {         break;       }       a[left_start++] =  0  + f[digit];     }     cout << a << endl;   }   