Submission #1175911

#	Time	Username	Problem	Language	Result	Execution time	Memory
1175911		Tsagana	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++20	100 / 100	15 ms	5132 KiB

Main

#include<bits/stdc++.h>

#define IOS ios_base::sync_with_stdio(false);cin.tie();cout.tie();
#define all(x) x.begin(), x.end()
#define int long long
#define pq priority_queue
#define eb emplace_back
#define lb lower_bound
#define ub upper_bound
#define pb push_back
#define pp pop_back
#define F first
#define S second

using namespace std;

int n;
int a[200010];
int h1[200010];
int h2[200010];
int ans = 1e18;

void solve () {
	cin >> n;
	for (int i = 1; i <= n; i++) cin >> a[i];
	for (int i = 1; i <= n + 1; i++) h1[i] = h1[i-1] + max(0LL, a[i-1] - a[i] + 1);
	for (int i = n; i >= 1 - 1; i--) h2[i] = h2[i+1] + max(0LL, a[i+1] - a[i] + 1);
	for (int i = 1; i <= n; i++) ans = min(ans, max(h1[i], h2[i]));
	cout << ans;
}
signed main() {IOS solve(); return 0;}

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