제출 #666312

#제출 시각아이디문제언어결과실행 시간메모리
666312jamezzz선물상자 (IOI15_boxes)C++17
100 / 100
943 ms151896 KiB
#include <bits/stdc++.h>
using namespace std;
 
#define LINF 1023456789123456789
typedef long long ll;
#define maxn 10000005
 
ll pfx[maxn], sfx[maxn];
 
ll delivery(int N, int K, int L, int p[]){
    sort(p, p + N);
    for (int i = 0; i < N; ++i) {
        sfx[i % K] += min(L, 2 * (L - p[i]));
    }
    ll ans = sfx[0];
    for (int i = 0; i < N; ++i) {
        pfx[i % K] += min(L, 2 * p[i]);
        sfx[i % K] -= min(L, 2 * (L - p[i]));
        ans = min(ans, pfx[i % K] + sfx[(i + 1) % K]);
    }
    return ans;
}
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