Submission #393212

#	Time	Username	Problem	Language	Result	Execution time	Memory
393212		peuch	Boxes with souvenirs (IOI15_boxes)	C++17	10 / 100	1 ms	208 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 l[N + 100], r[N + 100];
	long long n = N;
	long long k = K;
	for(int i = 0; i < N; i++){
		l[i] = 2 * p[i];
		if(i >= k) l[i] += l[i - k];
	}
	r[N + 1] = 0;
	for(int i = N - 1; i >= 0; i--){
		r[i] = 2 * (L - p[i]);
		if(i + k < N) r[i] += r[i + k];
	}
	long long ans = n * L;
	for(int i = 0; i < N; i++){
		ans = min(ans, l[i] + r[i + 1]);
		long long aux = L;
		int left = i - 1;
		int right = i + k;
		if(left >= 0) aux += l[left];
		if(right < N) aux += r[right];
		ans = min(ans, aux);
	}
	return ans;
}

Compilation message (stderr)

boxes.cpp: In function 'long long int delivery(int, int, int, int*)':
boxes.cpp:23:17: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   23 |   int right = i + k;
      |               ~~^~~

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