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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. #define ll long long
  4. #define endl "\n"
  5. #define fast ios::sync_with_stdio(NULL); cin.tie(0); cout.tie(0);
  6. #define pb push_back
  7. #define yes cout<<"YES"<<endl
  8. #define no cout<<"NO"<<endl
  9. #define F first
  10. #define S second
  11. #define C continue
  12. #define R return
  13. const ll N=5e5+9;
  14. const ll mod=1e9+7;
  15. const ll oo=1e18;
  16. const ll M=1e6+10;
  17. ll T,n,a[N],sum,mx;
  18. int main()
  19. {
  20.     fast
  21.     //freopen("input.in","r",stdin) ;
  22.     //freopen("output.txt","w",stdout);
  23.     T=1;
  24.     //cin>>T;
  25.     while(T--)
  26.     {
  27.         cin>>n;
  28.         sum=mx=0;
  29.         int f=0;
  30.         for(int i=1;i<=n;i++){
  31.             cin>>a[i];
  32.             if(a[i]<0) f++;
  33.             if(sum+a[i]<0)sum=0;
  34.             else sum+=a[i];
  35.             mx=max(mx,sum);
  36.         }
  37.         if(f==n) mx=*max_element(a+1,a+n+1);
  38.         cout<<mx;
  39.     }
  40.     return 0;
  41. }
  42.  
  43. /*
  44.  
  45.  
  46. */
  47.  
Success #stdin #stdout 0.01s 5280KB
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https://ideone.com/750Bgw
language:
C++14 (clang 8.0)
created:
352 days ago
visibility:
secret

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