Submission #127956

#	Time	Username	Problem	Language	Result	Execution time	Memory
127956		SOIVIEONE	Boxes with souvenirs (IOI15_boxes)	C++14	100 / 100	588 ms	215032 KiB

boxes

#include "boxes.h"
#include <bits/stdc++.h>
using namespace std;

long long delivery(int N, int K, int L, int p[]) 
{
	long long dp[N+2], pd[N + 2];
	long long n = N, k = K, l = L;
	dp[0] = 0;
	for(int i = 1; i <= n; i ++)
		dp[i] = dp[max(0ll, i - k)] + p[i - 1] * 2ll;
	pd[n + 1] = 0;
	for(int i = n; i >= 1; i --)
		pd[i] = pd[min(n + 1, i + k)] + (L-p[i - 1]) * 2ll;
	long long ans = 1e18;
	for(int i = 1; i <= n+1; i ++)
		ans = min(ans, dp[i - 1] + pd[i]);
	for(int i = 0; i < n; i ++)
	{
		if(i + k <= n)
			ans = min(ans, l + dp[i] + pd[i + k + 1]);
	}
	return ans;

}

Compilation message (stderr)

boxes.cpp: In function 'long long int delivery(int, int, int, int*)':
boxes.cpp:13:14: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
  for(int i = n; i >= 1; i --)
              ^

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