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  1. #include <bits/stdc++.h>
  2.  
  3. using namespace std;
  4.  
  5. int a[200006], n, arr1[200006], arr2[200006];
  6.  
  7. int main(){
  8.     ios_base :: sync_with_stdio(false);
  9.     cin.tie(0);
  10.  
  11.     int sum = 0;
  12.     cin >> n;
  13.     for(int j = 0; j < n+1; j++){
  14.         cin >> a[j];
  15.         sum += a[j];
  16.     }
  17.     sum -= a[n];
  18.     if(sum == n || (n == 1 && a[1] == 2)){
  19.         cout << "perfect\n";
  20.         return 0;
  21.     }
  22.  
  23.     arr1[1] = arr2[1] = 0;
  24.     int k = 2, flag = 0, par = 1, adj = 0;
  25.     for(int j = 1; j < n+1; j++){
  26.         int temp = k;
  27.         for(int i = 0; i < a[j]; i++)
  28.             arr1[k] = arr2[k] = par, k++;
  29.         par = temp;
  30.  
  31.         if(flag == 1){
  32.             flag = 2;
  33.             arr2[temp] = adj;
  34.         }
  35.         if(a[j] > 1) flag++, adj = temp + 1;
  36.     }
  37.  
  38.     cout << "ambiguous\n";
  39.     for(int j = 1; j < k; j++)
  40.         cout << arr1[j] << " ";
  41.     cout << endl;
  42.     for(int j = 1; j < k; j++)
  43.         cout << arr2[j] << " ";
  44.     cout << endl;
  45.     return 0;
  46. }
  47.  
Success #stdin #stdout 0s 4344KB
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perfect
https://ideone.com/talzy9
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

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