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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.  
  11.     int n, k; cin >> n >> k;
  12.  
  13.     vector<int> v(n);
  14.  
  15.     for (auto &x : v) {
  16.         cin >> x;
  17.     }
  18.  
  19.     int p = 0;
  20.     unordered_map<int, int> mp;
  21.     mp[0] = 0;
  22.  
  23.     int ans = -1;
  24.  
  25.     for (int i = 0; i < n; i++) {
  26.         p += v[i];
  27.  
  28.         if (mp.count(p - k)) {
  29.             ans = max(ans, i + 1 - mp[p - k]);
  30.         }
  31.  
  32.         if (!mp.count(p)) mp[p] = i + 1;
  33.     }
  34.  
  35.     cout << ans << endl;
  36.  
  37.     executeTime();
  38.     return 0;
  39. }
Success #stdin #stdout #stderr 0.01s 5284KB
comments (?)
stdin
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10 5
5 0 4 1 50
4 32 2 4 50
stdout
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3
stderr
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Time Taken: 0.007584 secs
https://ideone.com/CIMm79
language:
C++14 (gcc 8.3)
created:
1 day ago
visibility:
public

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