Submission #676063

#	Time	Username	Problem	Language	Result	Execution time	Memory
676063		ToroTN	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++14	100 / 100	29 ms	6932 KiB

Main

#include<bits/stdc++.h>
using namespace std;
#define ll long long
ll n,a[200005],l[200005],r[200005],ans;
int main()
{
    ios_base::sync_with_stdio(0),cin.tie(0);
    cin >> n;
    for(int i=1;i<=n;i++)cin >> a[i];
    for(int i=2;i<=n;i++)
    {
        l[i]=l[i-1];
        if(a[i]<=a[i-1])l[i]+=a[i-1]-a[i]+1;
    }
    for(int i=n-1;i>=1;i--)
    {
        r[i]=r[i+1];
        if(a[i]<=a[i+1])r[i]+=a[i+1]-a[i]+1;
    }
    ans=min(l[n],r[1]);
    for(int i=1;i<n;i++)ans=min(ans,max(l[i],r[i+1])+(l[i]+a[i]==r[i+1]+a[i+1]));
    cout << ans;
}

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