Submission #574714

#	Time	Username	Problem	Language	Result	Execution time	Memory
574714		stevancv	Boxes with souvenirs (IOI15_boxes)	C++14	10 / 100	1 ms	340 KiB

boxes

#include <bits/stdc++.h>
#include "boxes.h"
#define ll long long
#define ld long double
#define sp ' '
#define en '\n'
#define smin(a, b) a = min(a, b)
#define smax(a, b) a = max(a, b)
using namespace std;
const int N = 2e5 + 2;
ll delivery(int N, int K, int D, int pos[]) {
    ll n = N;
    ll k = K;
    ll d = D;
    vector<ll> a(n + 2);
    for (int i = 1; i <= n; i++) a[i] = pos[i - 1];
    a[n + 1] = d;
    int l = 0, r = n + 1;
    ll ans = 1e18;
    while (l < r) {
        ll kolko = r - l - 1;
        kolko = (kolko + k - 1) / k;
        smin(ans, 2 * (a[l] + d - a[r]) + kolko * d);
        ll x = 2 * (a[l + 1] - a[l]);
        ll y = 2 * (a[r] - a[r - 1]);
        if (x < y) l++;
        else r--;
    }
    return ans;
}

Compilation message (stderr)

boxes.cpp: In function 'long long int delivery(int, int, int, int*)':
boxes.cpp:11:17: warning: declaration of 'N' shadows a global declaration [-Wshadow]
   11 | ll delivery(int N, int K, int D, int pos[]) {
      |             ~~~~^
boxes.cpp:10:11: note: shadowed declaration is here
   10 | const int N = 2e5 + 2;
      |           ^
boxes.cpp:18:22: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   18 |     int l = 0, r = n + 1;
      |                    ~~^~~

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