Submission #647823

#	Time	Username	Problem	Language	Result	Execution time	Memory
647823		ymm	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++17	100 / 100	31 ms	4636 KiB

Main

#include <bits/stdc++.h>
#define Loop(x,l,r) for (ll x = (l); x < (ll)(r); ++x)
#define LoopR(x,l,r) for (ll x = (r)-1; x >= (ll)(l); --x)
typedef long long ll;
typedef std::pair<int, int> pii;
typedef std::pair<ll , ll > pll;
using namespace std;

const int N = 200'010;
int a[N];
int d1[N], d2[N];
int n;

int main()
{
	cin.tie(0) -> sync_with_stdio(false);
	cin >> n;
	Loop (i,0,n)
		cin >> a[i];
	Loop (i,0,n-1)
		d1[i] = max(0, a[i] - a[i+1] + 1);
	Loop (i,1,n)
		d2[i] = max(0, a[i] - a[i-1] + 1);
	ll s1=0, s2=0;
	Loop (i,1,n)
		s2 += d2[i];
	ll ans = s2;
	Loop (i,1,n) {
		s1 += d1[i-1];
		s2 -= d2[i];
		ans = min(ans, max(s1, s2));
	}
	cout << ans << '\n';
}

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