Submission #439673

#	Time	Username	Problem	Language	Result	Execution time	Memory
439673		MohamedAhmed04	Discharging (NOI20_discharging)	C++17	11 / 100	166 ms	12468 KiB

Discharging

#include <bits/stdc++.h>

using namespace std ;

const int MAX = 1e6 + 10 ;

int arr[MAX] ;
int n ;

long long dp[MAX] ; 

int main()
{
	ios_base::sync_with_stdio(0) ;
	cin.tie(0) ;
	cin>>n ;
	for(int i = 1 ; i <= n ; ++i)
		cin>>arr[i] ;
	stack<int>s ;
	for(int i = n ; i >= 1 ; --i)
	{
		while(s.size() && arr[i] >= arr[s.top()])
			s.pop() ;
		if(s.size())
			dp[i] = dp[s.top()] ;
		dp[i] += 1ll * arr[i] * (n-i+1ll) ;
		s.push(i) ;
	}
	long long ans = 4e18 ;
	while(s.size())
	{
		ans = min(ans , dp[s.top()] + 1ll * arr[s.top()] * (s.top() - 1ll)) ;
		s.pop() ;
	}
	return cout<<ans<<"\n" , 0 ;
}		

• Subtask 1: 0 / 9
• Subtask 2: 0 / 13
• Subtask 3: 0 / 25
• Subtask 4: 11 / 11
• Subtask 5: 0 / 14
• Subtask 6: 0 / 28