Submission #1287485

#	Time	Username	Problem	Language	Result	Execution time	Memory
1287485		Warinchai	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++20	100 / 100	17 ms	5116 KiB

Main

#include<bits/stdc++.h>
#define int long long
using namespace std;

int ar[200005];
int pre[200005];
int suf[200005];

int32_t main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    int n;cin>>n;
    for(int i=1;i<=n;i++)cin>>ar[i];
    int val=0;
    for(int i=1;i<=n;i++){
        val=max(ar[i-1]+1,ar[i]);
        pre[i]=pre[i-1]+val-ar[i];
    }
    val=0;
    for(int i=n;i>=1;i--){
        val=max(ar[i+1]+1,ar[i]);
        suf[i]=suf[i+1]+val-ar[i];
    }
    int ans=1e18;
    for(int i=1;i<=n;i++){
        ans=min(ans,max(pre[i],suf[i]));
    }
    cout<<ans<<"\n";
}

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