func_code_string: #include <bits/stdc++.h>   using namespace std;   const int N = 200005;   int n, a[N], ans[N], cnt, x, y;   bool Ok = 0;   int main() {     cin >> n;     for (int i = 0; i <= n; i++) {       cin >> a[i];       if (i) Ok |= (a[i] > 1 && a[i - 1] > 1);     }     if (!Ok) {       cout <<  perfect ;     } else {       cout <<  ambiguous  << endl;       cnt = 1;       for (int i = 1; i <= n; i++) {         for (int j = 1; j <= a[i]; j++) {           ans[cnt + j] = cnt;         }         if (a[i] > 1 && a[i - 1] > 1) {           x = cnt + a[i];           y = cnt - 1;         }         cnt += a[i];       }       for (int i = 1; i <= cnt; i++) {         cout << ans[i] <<    ;       }       cout << endl;       ans[x] = y;       for (int j = 1; j <= cnt; j++) {         cout << ans[j] <<    ;       }     }     return 0;   }   