Submission #1095302

#	Time	Username	Problem	Language	Result	Execution time	Memory
1095302		Tesla89	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++14	100 / 100	19 ms	6308 KiB

Main

#include <bits/stdc++.h>
#define endl '\n'

using namespace std;

int a[200010];
long pref[200010],suf[200010],res=LONG_MAX;

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int n;
    cin>>n;
    for(int i=1;i<=n;i++)cin>>a[i];
    for(int i=1;i<=n;i++){
        if(a[i]>a[i-1])pref[i]=pref[i-1];
        else pref[i]=pref[i-1]+a[i-1]-a[i]+1;
    }
    for(int i=n-1;i>0;i--){
        if(a[i]>a[i+1])suf[i]=suf[i+1];
        else suf[i]=suf[i+1]+a[i+1]-a[i]+1;
    }
    for(int i=1;i<=n;i++)res=min(res,max(pref[i],suf[i]));
    cout<<res<<endl;
    return 0;
}

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