Submission #935824

#	Time	Username	Problem	Language	Result	Execution time	Memory
935824		koukirocks	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++17	100 / 100	21 ms	5480 KiB

Main

#include <bits/stdc++.h>
#define speed ios_base::sync_with_stdio(0); cin.tie(0)
#define all(x) (x).begin(),(x).end()
 
using namespace std;
typedef long long ll;
typedef double db;
typedef long double ldb;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
 
const ll MAX=2e5+10,P=998244353;
const ll INF=0x3f3f3f3f,oo=0x3f3f3f3f3f3f3f3f;

int n;
ll a[MAX];
ll rt[MAX];

int main() {
	speed;
	cin>>n;
	ll last=0;
	for (int i=1;i<=n;i++) {
		cin>>a[i];
		a[i]=a[i]-last;
		last+=a[i];
//		cout<<a[i]<<" ";
	}
//	cout<<"\n";
	ll ans=oo;
	rt[n+1]=0;
	for (int i=n;i>=1;i--) {
		rt[i]=rt[i+1]+max(0ll,a[i]+1);
	}
	ll lft=0;
	for (int i=1;i<=n+1;i++) {
		ans=min(ans,max(lft,rt[i]));
		lft+=max(0ll,1-a[i]);
	}
	cout<<ans<<"\n";
	return 0;
}

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