제출 #836733

#제출 시각아이디문제언어결과실행 시간메모리
836733AbdelmagedNourBoxes with souvenirs (IOI15_boxes)C++17
10 / 100
1 ms336 KiB
#include <bits/stdc++.h>
using namespace std;
//#include "grader.cpp"
#include "boxes.h"

long long delivery(int N, int K, int L, int p[]){
    vector<long long>pre(K+1),suf(K+1);
    long long res=LLONG_MAX;
    for(int i=K-1;i<N;i++)suf[i%K]+=L-p[i];
    for(int i=K-1;i<N;i++){
        int l=p[i-K+1],r=p[i];
        suf[i%K]-=L-p[i];
        if(i>=K)pre[i%K]+=p[i-K];
        int cost=min({L,2*r,2*(L-l)});
        res=min(res,cost+2*pre[i%K]+2*suf[(i+1)%K]);
    }
    return res;
}
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