Submission #471993

#	Time	Username	Problem	Language	Result	Execution time	Memory
471993		nicholask	Boxes with souvenirs (IOI15_boxes)	C++14	100 / 100	675 ms	272012 KiB

boxes

#include "boxes.h"
#include <bits/stdc++.h>
using namespace std;
long long delivery(int N, int K, int L, int p[]){
	vector <int> v;
	v.push_back(0);
	for (int i=0; i<N; i++){
		if (p[i]) v.push_back(p[i]); 
	}
	int n=v.size();
	long long dp0[n+1],dp1[n+1];
	dp0[0]=dp1[n]=0;
	for (int i=1; i<n; i++){
		if (i<=K) dp0[i]=min(1ll*L,2ll*v[i]);
		else dp0[i]=dp0[i-K]+min(1ll*L,2ll*v[i]);
	}
	for (int i=n-1; i>0; i--){
		if (n-i<=K) dp1[i]=min(1ll*L,2ll*(L-v[i]));
		else dp1[i]=dp1[i+K]+min(1ll*L,2ll*(L-v[i]));
	}
	long long ans=5e18;
	for (int i=0; i<n; i++) ans=min(ans,dp0[i]+dp1[i+1]);
	for (int i=0; i+K<n; i++) ans=min(ans,dp0[i]+dp1[i+K+1]+L);
	return ans;
}
/*
signed main(){
	int n,k,l;
	cin>>n>>k>>l;
	int p[n];
	for (int i=0; i<n; i++) cin>>p[i];
	cout<<delivery(n,k,l,p)<<'\n';
}
*/

Compilation message (stderr)

boxes.cpp: In function 'long long int delivery(int, int, int, int*)':
boxes.cpp:10:14: warning: conversion from 'std::vector<int>::size_type' {aka 'long unsigned int'} to 'int' may change value [-Wconversion]
   10 |  int 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