Submission #395312

#	Time	Username	Problem	Language	Result	Execution time	Memory
395312		Nordway	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++17	100 / 100	35 ms	8544 KiB

Main

#include<bits/stdc++.h>
#define x first
#define y second
#define pb push_back
#define mp make_pair
#define sz(v) v.size()
#define up_b upper_bound
#define low_b lower_bound
#define all(v) v.begin(),v.end()

using namespace std;

typedef long long ll;
typedef long double ld;

const int N=2e5+11;
const ll mod=1e9+7;
const ll INF=1e18;

ll a[N],b[N];
ll pref[N],suf[N];

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

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