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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. const int MAXA = 1000000000;
  5.  
  6. vector<int> A;
  7. vector<bool> L, R;
  8.  
  9. int main()
  10. {
  11.     int n;
  12.     cin >> n;
  13.     A.resize(n + 2);
  14.     A[0] = 0;
  15.     for (int i = 1; i <= n; ++i) {
  16.         cin >> A[i];
  17.     }
  18.     A[n + 1] = MAXA + 1;
  19.     L.resize(n + 2);
  20.     L[0] = true;
  21.     for (int i = 1; i <= n + 1; ++i) {
  22.         L[i] = L[i - 1] && (A[i - 1] < A[i]);
  23.     }
  24.     R.resize(n + 2);
  25.     R[n + 1] = true;
  26.     for (int i = n; i >= 0; --i) {
  27.         R[i] = R[i + 1] && (A[i] < A[i + 1]);
  28.     }
  29.     for (int i = 1; i <= n; ++i) {
  30.         if (!L[i - 1] || !R[i + 1]) {
  31.             continue;
  32.         }
  33.         for (int a = A[i - 1] + 1; a < A[i + 1]; ++a) {
  34.             if (a != A[i]) {
  35.                 cout << "TAK " << i << " " << a << endl;
  36.                 return 0;
  37.             }
  38.         }
  39.     }
  40.     cout << "NIE" << endl;
  41.     return 0;
  42. }
Success #stdin #stdout 0s 15240KB
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TAK 2 3
https://ideone.com/SdeabK
language:
C++14 (gcc 8.3)
created:
5 years ago
visibility:
secret

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