func_code_string: #include <bits/stdc++.h>   using namespace std;   int n;   int s[1005];   int us[1005];   int t[1005];   int ut[1005];   int a[1005];   int main() {     scanf( %d , &n);     for (int i = 0; i < n; i++) {       scanf( %d , &s[i]);       us[s[i]]++;     }     for (int i = 0; i < n; i++) {       scanf( %d , &t[i]);       ut[t[i]]++;     }     int t1 = 0;     for (int i = 1; i <= n; i++) {       if (us[i] == 0) {         t1 = i;       }     }     vector<int> dif;     for (int i = 0; i < n; i++) {       a[i] = s[i];       if (us[s[i]] == 2) {         dif.push_back(i);       }     }     int tmp;     for (auto i : dif) {       tmp = a[i];       a[i] = t1;       int cnt = 0;       for (int j = 0; j < n; j++) {         if (a[j] != t[j]) cnt++;       }       if (cnt == 1) {         for (int j = 0; j < n; j++) {           printf( %d%c , a[j], (   n [j == n - 1]));         }         return 0;       }       a[i] = tmp;     }   }   