Submission #780132

#	Time	Username	Problem	Language	Result	Execution time	Memory
780132		vjudge1	Boxes with souvenirs (IOI15_boxes)	C++17	35 / 100	1 ms	304 KiB

boxes

#include "boxes.h"
#include<bits/stdc++.h>
using namespace std;
#define pb push_back
#define pii pair<long long, long long>
#define st first
#define nd second
#define sp " "
#define endl "\n"
#define ll long long


const ll INF = 2e18 + 7;

long long delivery(int N, int K, int L, int p[]) {
    int n = N, k = K, l = L;
    sort(p, p + n);
    int pos = 0;
    while(pos< n && p[pos] <= L / 2) pos++;

    vector<ll> dp(n + 5, INF);
    dp[n] = 0;
    for (int i = n - 1; i >= 0; i--){
        int t1 = min(i + k - 1, pos - 1);
        t1 = max(t1, i);
        int t2 = min(i + k - 1, n - 1);
        int tmp[] = {t1, t2};
        for (int l = 0; l < 2; l++){
            int j = tmp[l];
            ll c = 0;
            if (p[j] <= L / 2) c = 2 * p[j];
            else if (p[i] >= L / 2) c = 2 * (L - p[i]);
            else c = L;
            dp[i] = min(dp[i], dp[j + 1] + c);
        }
        //cout<<i<<sp<<t1<<sp<<t2<<sp<<dp[i]<<endl;
    }

    return dp[0];
}

Compilation message (stderr)

boxes.cpp: In function 'long long int delivery(int, int, int, int*)':
boxes.cpp:28:18: warning: declaration of 'l' shadows a previous local [-Wshadow]
   28 |         for (int l = 0; l < 2; l++){
      |                  ^
boxes.cpp:16:23: note: shadowed declaration is here
   16 |     int n = N, k = K, l = L;
      |                       ^
boxes.cpp:16:23: warning: unused variable 'l' [-Wunused-variable]

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