Submission #1243437

#	Time	Username	Problem	Language	Result	Execution time	Memory
1243437		lechaa	Boxes with souvenirs (IOI15_boxes)	C++20	10 / 100	0 ms	332 KiB

boxes

#include "boxes.h"
#include <bits/stdc++.h>
using namespace std;

long long delivery(int n, int k, int l, int p[]) {
    vector<long long> j(n+1);
    for(int i = 1; i <= n; i++){
        j[i] = p[i-1];
    }
    vector<long long> pref(n+1);
    long long ans = 1e18;
    for(int i = 1; i <= n; i++){
        if(i <= k){
            pref[i] = j[i] + min(l - j[i], j[i]);
        }else{
            pref[i] = pref[i-k] + (j[i] - j[i-k]) + j[i-k] * 2 + min(j[i], l-j[i]);
        }
    }
    vector<long long> suf(n+2);
    for(int i = n; i >= 1; i--){
        if(i > n-k){
            suf[i] = l - j[i] + min(j[i], l-j[i]);
        }else{
            suf[i] = suf[i+k] + (j[i+k] - j[i]) + (l - j[i+k]) * 2 + min(j[i], l-j[i]);
        }
    }
    for(int i = 0; i <= n; i++){
        // cout << pref[i] << " " << suf[i+1] << " " << i << endl;
        ans = min(pref[i] + suf[i+1], ans);
    }
    return ans;
}

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