제출 #986368

#제출 시각아이디문제언어결과실행 시간메모리
986368Pyqe선물상자 (IOI15_boxes)C++17
100 / 100
526 ms372076 KiB
#include "boxes.h"
#include <bits/stdc++.h>

using namespace std;

long long n,a[10000069],dp[2][10000069],inf=1e18;

long long delivery(int on,int d,int ln,int aa[])
{
	long long i,ii,u,z=inf;
	
	n=on;
	for(i=1;i<=n;i++)
	{
		a[i]=aa[i-1];
	}
	for(ii=0;ii<2;ii++)
	{
		u=!ii*2-1;
		for(i=1+(n-1)*ii;i!=(n+1)*!ii;i+=u)
		{
			dp[ii][i]=dp[ii][min(max(i-d*u,0ll),n+1)]+abs(a[i]-ln*ii)*2;
		}
	}
	for(i=0;i<=n;i++)
	{
		z=min(z,dp[0][i]+min(dp[1][i+1],dp[1][min(i+d+1,n+1)]+ln));
	}
	return z;
}
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