Submission #1000007

#	Time	Username	Problem	Language	Result	Execution time	Memory
1000007		coolboy19521	Boxes with souvenirs (IOI15_boxes)	C++17	100 / 100	523 ms	450524 KiB

boxes

#include "bits/stdc++.h"
#include "boxes.h"

#define intt long long

using namespace std;

const intt sz = 1e7 + 7;

intt pr[sz], su[sz], fo[sz], ba[sz];

long long delivery(int N, int K, int L, int p[]) {
    for (intt i = 0; i < N; i ++) {
        pr[i] = min(L, p[i] * 2);
    }

    for (intt i = 0; i < N; i ++) {
        su[i] = min(L, (L - p[i]) * 2);
    }

    for (intt i = 0; i < N; i ++) {
        fo[i] = pr[i];
        if (i >= K) {
            fo[i] += fo[i - K];
        }
    }

    for (intt i = N - 1; -1 < i; i --) {
        ba[i] = su[i];
        if (i + K < N) {
            ba[i] += ba[i + K];
        }
    }

    intt mn = ba[0];

    for (intt i = 0; i < N; i ++) {
        mn = min(mn, fo[i] + ba[i + 1]);
    }

    return mn;
}

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 15 / 15
• Subtask 4: 15 / 15
• Subtask 5: 20 / 20
• Subtask 6: 30 / 30