Submission #290906

#	Time	Username	Problem	Language	Result	Execution time	Memory
290906		arayi	Boxes with souvenirs (IOI15_boxes)	C++17	50 / 100	2093 ms	27768 KiB

boxes

#include <bits/stdc++.h>
#include "boxes.h"
#define lli long long int
using namespace std;
const int N = 1e7 + 20;
lli a[N], l;
int n, k;
lli dp[N], dp1[N], pat = LLONG_MAX;
long long delivery(int N, int K, int L, int p[])
{
    n = N, k = K, l = L;
    for (int i = 0; i < n; i++) a[i] = p[i];
    for (int i = 0; i < n; i++)
    {
        dp[i] = a[i] + a[i];
        if(i >= k) dp[i] += dp[i - k];
    }
    pat = dp[n - 1];
    for(int i = n - 1; i >= 0; i--)
    {
        dp1[i] = l - a[i] + l - a[i];
        if(n - i > k) dp1[i] += dp1[i + k];
        if(i) pat = min(pat, dp1[i] + dp[i - 1]);
        else pat = min(pat, dp1[0]);
    }
    for (int l = 0; l < n; l++)
    {
        for (int r = l; r < n; r++)
        {
            lli sm = ((r - l) / k + 1) * 1LL * L;
            if(l) sm += dp[l - 1];
            if(r < n - 1) sm += dp1[r + 1];
            pat = min(pat, sm);
        }
    }
    return pat;
}

Compilation message (stderr)

boxes.cpp: In function 'long long int delivery(int, int, int, int*)':
boxes.cpp:9:48: warning: declaration of 'N' shadows a global declaration [-Wshadow]
    9 | long long delivery(int N, int K, int L, int p[])
      |                                                ^
boxes.cpp:5:11: note: shadowed declaration is here
    5 | const int N = 1e7 + 20;
      |           ^
boxes.cpp:26:14: warning: declaration of 'l' shadows a global declaration [-Wshadow]
   26 |     for (int l = 0; l < n; l++)
      |              ^
boxes.cpp:6:11: note: shadowed declaration is here
    6 | lli a[N], l;
      |           ^

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