제출 #565374

#제출 시각아이디문제언어결과실행 시간메모리
565374n0sk1ll선물상자 (IOI15_boxes)C++14
100 / 100
552 ms278456 KiB
#include "boxes.h"
#include <bits/stdc++.h>

using namespace std;
long long int typedef li;

li dp[10000007];
li dpr[10000007];

long long delivery(int n, int k, int L, int p[])
{
    for (int i=1;i<=n;i++) dp[i]=dp[max(0,i-k)]+2*p[i-1];
    for (int i=n;i>=1;i--) dpr[i]=dpr[min(n+1,i+k)]+2*(L-p[i-1]);

    li ans=1e18;
    for (int i=1;i<=n+1;i++) ans=min(ans,dp[i-1]+dpr[i]);
    for (int i=k;i<=n;i++) ans=min(ans,dp[i-k]+dpr[i+1]+L);
    return ans;
}
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