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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. #define int              long long int
  4. #define double           long double
  5. #define print(a)         for(auto x : a) cout << x << " "; cout << endl
  6.  
  7.  
  8. const int M = 1000000007;
  9. const int N = 3e5+9;
  10. const int INF = 2e9+1;
  11. const int LINF = 2000000000000000001;
  12.  
  13. inline int power(int a, int b, int mod=M) {
  14.     int x = 1;
  15.     a %= mod;
  16.     while (b) {
  17.         if (b & 1) x = (x * a) % mod; 
  18.         a = (a * a) % mod;
  19.         b >>= 1;
  20.     }
  21.     return x;
  22. }
  23.  
  24.  
  25. //_ ***************************** START Below *******************************
  26.  
  27. // 6 4
  28. // -3 4 3 -5 2 4
  29.  
  30.  
  31. vector<int> a;
  32.  
  33. int consistency(int n, int k){
  34.  
  35. 	deque<int> up;
  36. 	vector<int> prefix(n+1, 0);
  37.  
  38. 	int ans = 0;
  39.  
  40. 	for(int i=1; i<=n; i++){
  41. 		prefix[i] = prefix[i-1] + a[i-1];
  42.  
  43. 		while(!up.empty() && prefix[i-1] < prefix[up.back()]  ) up.pop_back();
  44. 		up.push_back(i-1);
  45.  
  46. 		if(!up.empty() && i-k-1 == up.front()) up.pop_front();
  47.  
  48.  
  49. 		auto mini = prefix[up.front()];
  50. 		int val = prefix[i] - mini;
  51.  
  52. 		ans = max(ans, val);
  53. 	}
  54.  
  55. 	return ans;
  56. }
  57.  
  58.  
  59.  
  60.  
  61.  
  62.  
  63.  
  64.  
  65.  
  66.  
  67.  
  68.  
  69.  
  70.  
  71.  
  72. int practice(int n, int k){
  73.  
  74.  
  75.     return 0;
  76. }
  77.  
  78.  
  79.  
  80.  
  81.  
  82. void solve() {
  83.  
  84.     int n, k;
  85.     cin>> n >> k;
  86.  
  87.     a.resize(n);
  88.     for(int i=0; i<n; i++) cin >> a[i];
  89.  
  90.     cout << consistency(n, k) << endl;
  91.  
  92.  
  93. }
  94.  
  95.  
  96.  
  97.  
  98.  
  99. int32_t main() {
  100.     ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
  101.  
  102.     int t = 1;
  103.     // cin >> t;
  104.     while (t--) {
  105.         solve();
  106.     }
  107.  
  108.     return 0;
  109. }
Success #stdin #stdout 0s 5308KB
comments (?)
stdin
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6 4
-3 4 3 -5 2 4
stdout
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7
https://ideone.com/IbuuJE
language:
C++14 (gcc 8.3)
created:
3 days ago
visibility:
public

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