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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. void executeTime() {
  5.     cerr << "Time Taken: " << (float)clock() / CLOCKS_PER_SEC << " secs";
  6. }
  7.  
  8. int main() {
  9.  
  10.     int n, k; cin >> n >> k;
  11.  
  12.     vector<int> v(n);
  13.     for (auto &x : v) {
  14.         cin >> x;
  15.     }
  16.  
  17.     unordered_map<int, int> mp;
  18.     int f = 1;
  19.  
  20.     for (int i = 0; i < n; i++) {
  21.         if (mp.count(v[i])) {
  22.             if (i - mp[v[i]] <= k) {
  23.                 f = 0;
  24.                 cout << "YES" << endl;
  25.                 break;
  26.             }
  27.         }
  28.  
  29.         mp[v[i]] = i;
  30.     }
  31.  
  32.     if (f) cout << "NO" << endl;
  33.  
  34.     executeTime();
  35.     return 0;
  36. }
Success #stdin #stdout #stderr 0.01s 5320KB
comments (?)
stdin
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10 5
1 23 1 7 50
1 32 23 1 50
stdout
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YES
stderr
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Time Taken: 0.005518 secs
https://ideone.com/3FrKYZ
language:
C++14 (gcc 8.3)
created:
1 day ago
visibility:
public

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