fork download
copy 
  1. #include<bits/stdc++.h>
  2. #define ll long long
  3. using namespace std;
  4. int main()
  5. {
  6.     ll n,i,t=0,ma=INT_MIN,d=0;
  7.     cin>>n;
  8.     vector<ll> a(n);
  9.     for(i=0;i<n;i++) cin>>a[i];
  10.     for(ll i:a)  if(i==1) t++;
  11.     for(i=0;i<n;i++)
  12.     {
  13.         if(a[i]==0) d++;
  14.         else d--;
  15.         ma=max(ma,d);
  16.         if(d<0) d=0;
  17.     }
  18.     cout<<t+ma;
  19. }
  20.  
Success #stdin #stdout 0.01s 5288KB
comments (?)
stdin
copy 
8
1 0 0 1 1 0 0 0
stdout
copy 
6
https://ideone.com/a0CRXa
language:
C++14 (gcc 8.3)
created:
6 days 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!