Submission #931927

#	Time	Username	Problem	Language	Result	Execution time	Memory
931927		Aiperiii	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++14	0 / 100	30 ms	756 KiB

Main

#include <bits/stdc++.h>
#define int long long
#define ff first
#define ss second
#define all(x) x.begin(),x.end()
#define pb push_back
using namespace std;
signed main(){
    ios_base::sync_with_stdio();
    cin.tie(0);cout.tie(0);
    int n;cin>>n;
    vector <int> a(n+1);
    for(int i=1;i<=n;i++)cin>>a[i];
    a.pb(0);
    int mn=1e18;
    vector <int> cnt(n+1);
    for(int i=1;i<=n;i++){
        vector <int> v=a;
        for(int j=1;j<=i;j++){
            v[j]=max(v[j-1]+1,v[j]);
            cnt[j]=v[j]-a[j];
        }
        for(int j=n;j>=i;j--){
            v[j]=max(v[j+1]+1,v[j]);
            cnt[j]=v[j]-a[j];
        }
        int ans=0;
        int l=1,r=n;
        while(l<=r){
            int x=min(cnt[l],cnt[r]);
            ans+=x;
            cnt[l]-=x;
            if(r!=l)cnt[r]-=x;
            if(!cnt[l])l++;
            if(!cnt[r])r--;
        }
        mn=min(mn,ans);
    }
    cout<<mn<<"\n";
}
/*
5
3 2 2 3 1
 5
 9 7 5 3 1
 */

• Subtask 1: 0 / 40
• Subtask 2: 0 / 60