Submission #412978

#	Time	Username	Problem	Language	Result	Execution time	Memory
412978		Chaska	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++11	100 / 100	104 ms	4976 KiB

Main

#include <bits/stdc++.h> 
#define pb push_back
#define sp " "
#define sl "\n"
#define fi first
#define se second
#define mp make_pair
#define sz(a) ((int)a.size())
#define all(a) a.begin(),a.end()
#define rev(a) reverse(a.begin(),a.end())
#define PI 3.141592
#define fo(i,n) for (int i=0;i<n;i++)
#define fofo(i,n,j,m) for (int i=0;i<n;i++) for (int j=0;j<m;j++) 
 
using namespace std;
 
typedef long long ll;
typedef pair<ll,ll> ii;
typedef pair<int,ii> iii;
typedef vector<int> vi;
typedef vector<ii> vii;
const int N=2e5+5,mod=1e9+7;
ll n,a[N],b[N],c[N];
int main() { 
	cin.tie(0); cout.tie(0); 
	ios_base::sync_with_stdio();
	cin >> n;
	for (int i=0;i<n;i++) 
		cin >> a[i];

	for (int i=1;i<n;i++) 
		if (a[i-1]>=a[i]) 
			b[i] = a[i-1]-a[i]+1;

	for (int i=n-2;i>=0;i--) 
		if (a[i+1]>=a[i]) 
			c[i] = a[i+1]-a[i]+1;

	long long k = 0;
	for (int i=0;i<n;i++) 
		k += c[i];

	long long res = 1e18;

		long long q = 0;
	for (int i=0;i<n;i++) {
		q += b[i];
		
		res = min(res,max(q,k));
		k -= c[i];
	}
	cout << res;
	return 0;
}
// Recuerda limites 
// Recuerda casos especiales

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