Submission #1316130

#	Time	Username	Problem	Language	Result	Execution time	Memory
1316130		khanhphucscratch	Boxes with souvenirs (IOI15_boxes)	C++20	20 / 100	0 ms	332 KiB

boxes

#include "boxes.h"
#include<bits/stdc++.h>
#define int long long
using namespace std;
int delivery(int32_t n, int32_t k, int32_t len, int32_t p[]) {
    vector<int> prefix(n+1), suffix(n+1);
    for(int i = 0; i < n; i++){
        if(i < k) prefix[i] = p[i];
        else prefix[i] = prefix[i-k] + p[i];
    }
    for(int i = n-1; i >= 0; i--){
        if(i+k >= n) suffix[i] = len-p[i];
        else suffix[i] = suffix[i+k] + (len - p[i]);
    }
    int ans = suffix[0];
    for(int i = 0; i < n; i++) ans = min(ans, prefix[i] + suffix[i+1]);
    if(k < n) return 2*ans;
    else return min(2*ans, (int)len);
}

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