Submission #756733

#	Time	Username	Problem	Language	Result	Execution time	Memory
756733		matere	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++14	0 / 100	1 ms	212 KiB

Main

#include<bits/stdc++.h>
using namespace std;
int n,a[200005],pref[200005],suf[200005],ans=1999999999;
int main(){
	cin>>n;
	for(int i=1;i<=n;i++){
		cin>>a[i];
	}
	for(int i=1;i<=n;i++){
		pref[i]=max((a[i-1]+pref[i-1])-a[i]+1,0);
//		cout<<pref[i]<<' ';
	}
//	cout<<endl;
	for(int i=n;i>=1;i--){
		suf[i]=max((a[i+1]+suf[i+1])-a[i]+1,0);
//		cout<<suf[i]<<' ';
	}
//	cout<<endl;
	for(int i=0;i<=n;i++){
//		cout<<i<<' '<<pref[i]<<' '<<suf[i+1]<<endl;
		if(a[i]+pref[i]==a[i+1]+suf[i+1]) ans=min(ans,max(pref[i],suf[i+1])+1);
		else ans=min(ans,max(pref[i],suf[i+1]));
	}
	cout<<ans<<endl;
}

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