func_code_string: #include <bits/stdc++.h>   using namespace std;   string k;   long long n;   long long Judge(int L, int R) {     int flag = 0;     for (int i = L; i <= R; i++) {       if (k[i] !=  0 ) flag = 1;     }     if (flag == 1 && k[L] ==  0 ) return -1;     long long ans = 0;     for (int i = L; i <= R; i++) {       ans = (ans * 10 + (k[i] -  0 ));     }     if (ans >= n) {       return -1;     } else       return ans;   }   int getL(int l, int r) {     for (int i = l; i <= r; i++) {       if (k[i] !=  0 ) return i;     }     return r;   }   int main() {     cin >> n >> k;     long long ans = 0;     int len = k.size();     long long base = 1;     int l = len - 1;     int r = len - 1;     long long val;     while (r >= 0) {       for (int i = 0; i <= r; i++) {         if (r - i > 17) continue;         val = 0;         for (int j = i; j <= r; j++) val = val * 10 + k[j] -  0 ;         if (val < n) {           l = i;           break;         }       }       while (l < r && k[l] ==  0 ) l++;       ans = ans + base * val;       base *= n;       r = l - 1;     }     cout << ans << endl;     return 0;   }   