Submission #906270

#	Time	Username	Problem	Language	Result	Execution time	Memory
906270		AlphaMale06	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++14	100 / 100	25 ms	8784 KiB

Main

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;
#define yes cout << "YES\n"
#define no cout << "NO\n"
#define F first
#define S second
#define pb push_back
#define mp make_pair
#define all(x) (x).begin(), (x).end()
#define int long long



void solve(){
	int n;
	cin >> n;
	int a[n];
	for(int i=0; i< n; i++){
		cin >> a[i];
	}
	if(n==1){
		cout << 0 << '\n';
		return;
	}
	vector<int> rz;
	for(int i=1; i< n; i++)rz.pb(a[i]-a[i-1]);
	int pref[n];
	int suf[n];
	pref[0]=0;
	for(int i=0; i< n-1; i++){
		pref[i+1]=pref[i];
		if(rz[i]<=0)pref[i+1]+=abs(rz[i])+1;
	}
	suf[n-1]=0;
	for(int i=n-2; i>=0; i--){
		suf[i]=suf[i+1];
		if(rz[i]>=0)suf[i]+=rz[i]+1;
	}
	int ans=1e18;
	for(int i=0; i< n; i++){
		ans=min(ans, max(suf[i], pref[i]));
	}
	cout << ans << '\n';
}


signed main(){
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
	solve();
}

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