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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. #define int long long
  4.  
  5. unordered_map <int, vector<int>> f;
  6. int a[5555];
  7. signed main()
  8. {
  9.     ios_base::sync_with_stdio(false);
  10.     cin.tie(0); cout.tie(0);
  11.     int n, x; cin >> n >> x;
  12.     for (int i = 1; i <= n; i++)
  13.     {
  14.         cin >> a[i];
  15.         f[a[i]].push_back(i);
  16.     }
  17.     for (int i = 1; i < n; i++)
  18.         for (int j = i + 1; j <= n; j++)
  19.             if (a[i] + a[j] <= x && f.find(x - a[i] - a[j]) != f.end())
  20.             {
  21.                 for (int id : f[x - a[i] - a[j]])
  22.                     if (id != i && id != j)
  23.                         cout << i << ' ' << j << ' ' << id;
  24.                         return 0;
  25.             }
  26.     return 0;
  27. }
  28.  
Success #stdin #stdout 0.01s 5320KB
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https://ideone.com/pPn5oE
language:
C++14 (gcc 8.3)
created:
5 days ago
visibility:
public

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