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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. using ll = long long;
  4. int main() {
  5. 	int n;cin>>n;
  6. 	vector<ll>a(n);
  7. 	for(int i = 0;i<n;i++){
  8. 		cin>>a[i];
  9. 	}
  10.  
  11.     vector<vector<pair<ll,ll>>>dp(n);
  12.     dp[0].push_back({a[0],0});
  13.  
  14.     //dp[0][0]=0;
  15.     for(int i = 1 ;i < n ;i++){
  16.     	int sum = 0;
  17.     	for(int j = i ; j >=0;j--){
  18.     		int l = i-j;
  19.     		 sum+=a[j];
  20.     		 if(j==0){
  21.     		 	dp[i].push_back({sum,l});
  22.     		 }else{	
  23.     		 	ll moves = 1e18;
  24.     		 for(auto u:dp[j-1]){
  25.     		 	pair<ll,ll>p = u;
  26.  
  27.     		 	if(p.first<=sum){
  28.     		 	  moves = min(p.second,moves);
  29.     		 	}
  30.     		 }
  31.  
  32.     		 if(moves<1e18){
  33.     		 	dp[i].push_back({sum,moves+l});
  34.     		 }
  35.     		 }
  36.     	}
  37.     }
  38.  
  39.     long long ans = 1e18;
  40.     for(auto u:dp[n-1]){
  41.     	pair<ll,ll>p = u;
  42.     	if(p.second<1e18){
  43.     		ans = min(ans,p.second);
  44.     	}
  45.     }
  46.     cout<<ans;
  47. 	return 0;
  48. }
Success #stdin #stdout 0s 5312KB
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https://ideone.com/ApLn7X
language:
C++14 (gcc 8.3)
created:
1 day ago
visibility:
public

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