Submission #1145238

#	Time	Username	Problem	Language	Result	Execution time	Memory
1145238		thangdz2k7	Boxes with souvenirs (IOI15_boxes)	C++20	50 / 100	2095 ms	13564 KiB

boxes

#ifdef EVAL

#include "boxes.h"

#endif // EVAL

#include <bits/stdc++.h>

using namespace std;

const int MaxN = 1e7;
const long long inf = 1e18;

int pos[MaxN], n, k, len;
long long dp[MaxN];

int cost(int le, int ri){
    if (pos[ri] <= len / 2) return pos[ri] * 2;
    if (pos[le] > len / 2) return (len - pos[le]) * 2;
    return len;
}

long long delivery(int N, int K, int L, int position[]){
    n = N, k = K, len = L;
    for (int i = 0; i < n; ++ i)
        pos[i] = position[i];

    for (int i = 0; i < n; ++ i){
        dp[i] = inf;
        for (int j = max(0, i - k + 1); j <= i; ++ j){
            long long tmp = 0;
            if (j) tmp = dp[j - 1];
            dp[i] = min(dp[i], tmp + cost(j, i));
        }
    }

    return dp[n - 1];
}

#ifndef EVAL

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);

    cin >> n >> k >> len;

    for (int i = 0; i < n; ++ i)
        cin >> pos[i];

    cout << delivery(n, k, len, pos);
}

/*
10 1 5
0 0 0 0 0 1 3 3 3 4
*/

#endif // EVAL

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 15 / 15
• Subtask 4: 15 / 15
• Subtask 5: 0 / 20
• Subtask 6: 0 / 30