Submission #703177

#	Time	Username	Problem	Language	Result	Execution time	Memory
703177		ld_minh4354	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++17	100 / 100	27 ms	6948 KiB

Main

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

#define int long long
#define fi first
#define se second
#define pb push_back
#define debug(x) cout<<#x<<": "<<x<<"\n"



signed main()
{
	ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
//	freopen("input.000","r",stdin);
//	freopen("output.000","w",stdout);
//	srand((unsigned)time(NULL));
//	rand()
	
	int n,i,a[200005],l[200005],r[200005],ans;
	
	cin>>n;
	for (i=1;i<n+1;i++) cin>>a[i];
	
	l[1]=0;
	for (i=2;i<n+1;i++) l[i]=max(0ll, a[i-1]-a[i]+1);
	for (i=3;i<n+1;i++) l[i] += l[i-1];
	
	r[n]=0;
	for (i=n-1;i>0;i--) r[i]=max(0ll, a[i+1]-a[i]+1);
	for (i=n-2;i>0;i--) r[i] += r[i+1];
	
	ans=1e18;
	for (i=1;i<n+1;i++) ans=min(ans,max(l[i],r[i]));
	
	cout<<ans;
}

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