Submission #1218301

#	Time	Username	Problem	Language	Result	Execution time	Memory
1218301		jellybean	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++20	100 / 100	17 ms	1864 KiB

Main

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define fi first
#define se second
#define pb push_back
#define dd(x) cout<<#x<<" is "<<x<<endl;
typedef pair<int,int> pii;


signed main(){
	ios::sync_with_stdio(0); cin.tie(0);
	
	int n; cin>>n;
	int a[n+2]= {};
	for(int i=1; i<=n; i++) cin>>a[i];
	
	int ans = LLONG_MAX;
	
	int x=0, y=0;
	for(int i=1; i<=n; i++){
		if(a[i] <= a[i+1]) y+= (a[i+1]-a[i]+1);
	}
	ans = y;
	
	for(int k=2; k<=n; k++){ //k is the tallest guy
		if(a[k]>=a[k-1]) y -= (a[k]-a[k-1] +1);
		if(a[k] <= a[k-1]) x += (a[k-1]-a[k] +1);
		ans = min(ans,max(x,y));
	}
	cout<<ans;
	
	return 0;
}

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