Submission #220399

#	Time	Username	Problem	Language	Result	Execution time	Memory
220399		davitmarg	Boxes with souvenirs (IOI15_boxes)	C++17	0 / 100	5 ms	384 KiB

boxes

/*DavitMarg*/
#include <iostream>
#include <algorithm>
#include <cmath>
#include <vector>
#include <string>
#include <cstring>
#include <map>
#include <set>
#include <queue>
#include <iomanip>
#include <bitset>
#include <stack>
#include <cassert>
#include <iterator>
#include <fstream>
#define mod 1000000007ll
#define LL long long
#define LD long double
#define MP make_pair
#define PB push_back
#define all(v) v.begin(), v.end()
using namespace std;

const int N = 200005;

int n;
LL k, m, l[N], r[N],pos[N];
LL ans=mod*mod;

LL delivery(int N, int K, int L, int* P)
{
    n = N;
    k = K;
    m = L;
    for (int i = 0; i < n; i++)
        pos[i+1]=P[i];
    pos[n + 1] = m - 1;

    for (int i = 1; i <= n; i++)
    {
        l[i] = l[i - 1];
        int id = (i - 1) / k;
        l[i] += pos[i] - pos[id * k];
    }

    reverse(pos, pos + 1 + n + 1);
    for (int i = 1; i <= n; i++)
    {
        r[i] = r[i - 1];
        int id = (i - 1) / k;
        r[i] += pos[id * k] - pos[i];
    }
    reverse(pos, pos + 1 + n + 1);
    for (int i = 0; i <= n; i++)
    {
        l[i] += l[i];
        r[i] += r[i];
    }

    for (int i = 0; i <= n; i++)
        ans = min(ans, l[i] + r[n - i]);

    for (int i = 0; i + k <= n; i++)
        ans = min(ans, l[i] + r[n - i - k] + m);

    return ans;
}

#ifdef death

int main()
{
    int N, K, L;
    int P[102];
    cin >> N >> K >> L;
    for (int i = 0; i < N; i++)
        cin >> P[i];
    cout << delivery(N, K, L, P) << endl;
    return 0;
}

#endif

/*

3 2 8
1 2 5

2 2 6
4 5

*/

Compilation message (stderr)

boxes.cpp: In function 'long long int delivery(int, int, int, int*)':
boxes.cpp:31:40: warning: declaration of 'N' shadows a global declaration [-Wshadow]
 LL delivery(int N, int K, int L, int* P)
                                        ^
boxes.cpp:25:11: note: shadowed declaration is here
 const int N = 200005;
           ^
boxes.cpp:43:26: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
         int id = (i - 1) / k;
                  ~~~~~~~~^~~
boxes.cpp:51:26: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
         int id = (i - 1) / k;
                  ~~~~~~~~^~~

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