Submission #1145047

#	Time	Username	Problem	Language	Result	Execution time	Memory
1145047		ezzzay	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++20	0 / 100	1 ms	328 KiB

Main

#include<bits/stdc++.h>
using namespace std;
#define int long long
#define ff first
#define ss second
#define pb push_back
const int N=3e5+5;
int a[N];
int ps[N];
int sf[N];
signed main(){
	int n;
	cin>>n;
	for(int i=1;i<=n;i++)cin>>a[i];
	for(int i=1;i<=n;i++){
		ps[i]=ps[i-1];
		if(a[i]<=a[i-1])ps[i]+=a[i-1]-a[i]+1;
	}
	for(int i=n;i>=1;i--){
		sf[i]=sf[i+1];
		if(a[i]<=a[i+1])sf[i]+=a[i+1]-a[i]+1;
	}
	int ans=1e9;
	for(int i=0;i<=n;i++){
		if(ps[i]+a[i]== sf[i+1]+a[i+1])ans=min(ans,max(ps[i],sf[i+1])+1);
		else ans=min(ans,max(ps[i],sf[i+1]));
	}
	cout<<ans;
}

• Subtask 1: 0 / 40
• Subtask 2: 0 / 60