Submission #658653

#	Time	Username	Problem	Language	Result	Execution time	Memory
658653		Darren0724	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++17	100 / 100	24 ms	6996 KiB

Main

#include<bits/stdc++.h>
using namespace std;
#define int long long
#define all(x) x.begin(),x.end()
int INF=1e18;
signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    int n;cin>>n;
    vector<int> v(n+2);
    for(int i=1;i<=n;i++){
        cin>>v[i];
    }
    vector<int> pre(n+2),suf(n+2);
    for(int i=1;i<=n;i++){
        int t=max((int)0,v[i-1]+1-v[i]);
        pre[i]=pre[i-1]+t;
    }
    for(int i=n;i>=1;i--){
        int t=max((int)0,v[i+1]+1-v[i]);
        suf[i]=suf[i+1]+t;
    }
    int ans=INF;
    for(int i=1;i<=n;i++){
        ans=min(ans,max(pre[i],suf[i]));
    }
    cout<<ans<<endl;
    return 0;
}

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