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  1. #include<bits/stdc++.h>
  2. #define int long long
  3. using namespace std;
  4. int dp[1000001],n;
  5. signed main()
  6. {
  7.     cin>>n;
  8.     int a[n+1];
  9.     for (int i=1;i<=n;i++)
  10.     {
  11.         cin>>a[i];
  12.     }
  13.     dp[0]=0;
  14.     dp[1]=a[1];
  15.     for (int i=2;i<=n;i++)
  16.     {
  17.         dp[i]=max(dp[i-1],max(dp[i-2]+a[i],dp[i-3]+a[i]+a[i-1]));
  18.     }
  19.     cout<<dp[n];
  20. }
  21.  
Success #stdin #stdout 0.01s 5300KB
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4
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stdout
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18
https://ideone.com/4KHLXe
language:
C++14 (clang 8.0)
created:
270 days ago
visibility:
secret

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