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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. #define int long long
  4. void sol(){
  5.     int n;
  6.     cin >> n;
  7.     int a[n];
  8.     for(int &i:a) cin >> i;
  9.     int l[n], r[n];
  10.     l[0] = a[0];
  11.     r[n - 1] = a[n - 1];
  12.     for(int i = 1; i < n; i++) l[i] = max(l[i - 1] + a[i], a[i]);
  13.     for(int i = n - 2; i >= 0; i--) r[i] = max(r[i + 1] + a[i], a[i]);
  14.     int ans = -1e9;
  15.     for(int i = 0; i < n; i++) ans = max(ans, l[i]);
  16.     for(int i = 0; i < n; i++) ans = max(ans, r[i]);
  17.     for(int i = 1; i < n - 1; i++) ans = max(ans, r[i + 1] + l[i - 1]);
  18.     cout << ans << "\n";
  19. }
  20. signed main(){
  21.     ios_base::sync_with_stdio(false);
  22.     cin.tie(NULL);
  23.     cout.tie(NULL);
  24.     int t = 1;
  25.    // cin >> t;
  26.     while(t--){
  27.         sol();
  28.     }
  29.     return 0;
  30. }
Success #stdin #stdout 0.01s 5292KB
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9222167041858206806
https://ideone.com/eYHXLn
language:
C++ (gcc 8.3)
created:
7 hours ago
visibility:
secret

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