fork download
copy 
  1. #include <bits/stdc++.h>
  2. #include <ext/pb_ds/assoc_container.hpp>
  3. #include <ext/pb_ds/tree_policy.hpp>
  4.  
  5. using namespace std;
  6. using namespace __gnu_pbds;
  7. using ll = long long;
  8. using ld = long double;
  9.  
  10. #define all(x)  x.begin(),x.end()
  11. #define v(x) vector<x>
  12. #define nl '\n'
  13. #define fxd(x) fixed << setprecision(x)
  14. template<class t> using ordered_set = tree<t, null_type, less<t>, rb_tree_tag, tree_order_statistics_node_update>;
  15. template<class t> using ordered_multiset = tree<t, null_type, less_equal<t>, rb_tree_tag, tree_order_statistics_node_update>;
  16.  
  17.  
  18. int main()
  19. {
  20.     ios_base::sync_with_stdio(false); cin.tie(nullptr); cout.tie(nullptr);
  21.     int n; cin >> n;
  22.     v(ll) a(n);
  23.     for (int i = 0; i < n; i++)
  24.     {
  25.         cin >> a[i];
  26.     }
  27.     ll l = 0 , sl = 0 , sr = 0, mx =0 , r = n-1;
  28.     while (l <= r)
  29.     {
  30.         if(sl <= sr)
  31.         {
  32.             sl+= a[l];
  33.             l++;
  34.         }
  35.         else
  36.         {
  37.             sr += a[r];
  38.             r--;
  39.         }
  40.         if(sl == sr)
  41.         {
  42.             mx = sl;
  43.         }
  44.     }
  45.     cout << mx;
  46. }
Success #stdin #stdout 0s 5320KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
Standard output is empty
https://ideone.com/6LNB3t
language:
C++ (gcc 8.3)
created:
12 hours ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!