Submission #814054

#	Time	Username	Problem	Language	Result	Execution time	Memory
814054		MohamedAhmed04	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++14	100 / 100	25 ms	6136 KiB

Main

#include <bits/stdc++.h>

using namespace std ;

const int MAX = 2e5 + 10 ;

int arr[MAX] ;
int n ;

long long pref[MAX] , suff[MAX] ;

int main()
{
	ios_base::sync_with_stdio(0) ;
	cin.tie(0) ;
	cin>>n ;
	for(int i = 1 ; i <= n ; ++i)
		cin>>arr[i] ;
	for(int i = 2 ; i <= n ; ++i)
		pref[i] = pref[i-1] + max(0 , arr[i-1] + 1 - arr[i]) ;
	for(int i = n-1 ; i >= 1 ; --i)
		suff[i] = suff[i+1] + max(0 , arr[i+1] + 1 - arr[i]) ;
	long long ans = 4e18 ;
	for(int i = 1 ; i <= n ; ++i)
		ans = min(ans , max(pref[i] , suff[i])) ;
	return cout<<ans<<"\n" , 0 ;
}		

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