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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main()
  5. {
  6.  
  7.     vector<int>a={5,6,-1,4,-6,8,-14,6};
  8.     int n=a.size();
  9.     int curr=INT_MIN;
  10.     int prev=INT_MIN;
  11.  
  12.     vector<int>p3(n+1,INT_MIN),p4(n+1,INT_MIN);
  13.     prev=max(a[0],0);
  14.     p3[0]=prev;
  15.     for(int i=1;i<n;i++){
  16.         curr=max({prev+a[i],a[i],0});
  17.         p3[i]=max(p3[i-1],curr);
  18.         prev=curr;
  19.     }
  20.  
  21.     prev=max({a[n-1],0});
  22.     p4[n-1]=prev;
  23.     for(int i=n-2;i>=0;i--){
  24.         curr=max({prev+a[i],a[i],0});
  25.         p4[i]=max(p4[i+1],curr);
  26.         prev=curr;
  27.     }
  28.  
  29.  
  30.     int ans=INT_MIN;
  31.     ans=p4[0];
  32.     for(int i=0;i<n;i++){
  33.         ans=max(ans,p3[i]+p4[i+1]);
  34.     }
  35.     cout<<" ans "<<ans<<endl;
  36.     return 0;
  37. }
Success #stdin #stdout 0s 5312KB
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stdin
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Standard input is empty
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 ans 22
https://ideone.com/FlTQzP
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

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