Submission #725834

#	Time	Username	Problem	Language	Result	Execution time	Memory
725834		TheSahib	Boxes with souvenirs (IOI15_boxes)	C++17	100 / 100	565 ms	264576 KiB

boxes

#include "boxes.h"
#include <bits/stdc++.h>

#define ll long long

using namespace std;

const ll oo = 1e18;


ll delivery(int N, int K, int M, int p[])
{
    vector<int> v;
    for (int i = 0; i < N; i++)
    {
        if(p[i] == 0) continue;
        v.push_back(p[i]);
    }
    N = v.size();
    K = min(K, int(v.size()));
    
    if(N == 0) return 0;

    ll L[N + 1], R[N + 1];
    L[0] = 0;
    for (int i = 1; i <= N; i++)
    {
        L[i] = L[max(0, i - K)] + v[i - 1] * 2;
    }
    
    R[0] = 0;
    for (int i = 1; i <= N; i++)
    {
        R[i] = R[max(0, i - K)] + (M - v[N - i]) * 2;
    }
    ll ans = oo;
    for (int i = 0; i <= N; i++)
    {
        ans = min(ans, L[i] + R[N - i]);
        if(N - i - K >= 0){
            ans = min(ans, L[i] + R[N - i - K] + M);
        }
    }

    return ans;
}

Compilation message (stderr)

boxes.cpp: In function 'long long int delivery(int, int, int, int*)':
boxes.cpp:19:15: warning: conversion from 'std::vector<int>::size_type' {aka 'long unsigned int'} to 'int' may change value [-Wconversion]
   19 |     N = v.size();
      |         ~~~~~~^~

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