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  1. #include<bits/stdc++.h>
  2. #define M 200004
  3. using namespace std;
  4.  
  5. int n, a[M], dp[M];
  6.  
  7. int main()
  8. {
  9.     ios_base::sync_with_stdio(0);
  10.     cin.tie(0);     cout.tie(0);
  11.  
  12.     cin >> n;
  13.     for(int i = 1; i < n; i++)
  14.         cin >> a[i];
  15.     dp[1] = a[1];
  16.     dp[2] = a[1] + a[2];
  17.     for(int i = 3; i < n; i++)
  18.         dp[i] = min(dp[i - 1], dp[i - 2]) + a[i];
  19.     cout << dp[n - 1];
  20. }
  21.  
Success #stdin #stdout 0s 5284KB
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stdin
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6
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2
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stdout
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7
https://ideone.com/1xm7d4
language:
C++14 (clang 8.0)
created:
245 days ago
visibility:
public

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