Submission #1358763

#	Time	Username	Problem	Language	Result	Execution time	Memory
1358763		nini_gvenetadze	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++20	100 / 100	39 ms	5048 KiB

Main

#include<bits/stdc++.h>
using namespace std;
#define ll long long
int main()
{
    int n;
    cin>>n;
    vector<ll> a(n);
    for(int i=0; i<n; i++)
    {
        cin>>a[i];
    }
   
    vector<ll> pre(n, 0), suf(n, 0);
    for(int i=1; i<n; i++)
    {
        ll p=a[i-1]-a[i]+1;
        if(p<0) p=0;
        pre[i]=pre[i-1]+p;
    }

    for(int i=n-2; i>=0; i--)
    {
        ll p=a[i+1]-a[i]+1;
        if(p<0) p=0;
        suf[i]=suf[i+1]+p;
    }
    ll ans=1e18;

    for(int k=0; k<n; k++)
    {
        ll c=max(pre[k], suf[k]);
        ans=min(ans, c);
    }
    cout<<ans<<endl;
    return 0;
}

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