Submission #429155

#	Time	Username	Problem	Language	Result	Execution time	Memory
429155		dreezy	Boxes with souvenirs (IOI15_boxes)	C++17	100 / 100	593 ms	219064 KiB

boxes

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

long long delivery(int N, int K, int L, int p[]) {
	
	//vector<ll> p(N);
	
	
	vector<ll> left(N);
	for(int i =0; i<N;i++)
	{
		left[i] = 2 * p[i];
		if(i - K>= 0)
			left[i] += left[i - K];
		//cout << "LEFT "<<p[i]<<": "<<left[i]<<endl;
	}
	vector<ll> right(N);
	for(int i =N - 1; i>=0;i--)
	{
		right[i] = 2 * (L - p[i] );
		if(i + K <N)
			right[i] += right[i +K];
		//cout << "RIGHT "<<p[i]<<": "<<right[i]<<endl;
	}
	ll ans = min(left[N - 1], right[0]);

	
	for(int i = 1; i<N ; i++){
		ll posans = left[i - 1] + right[i];
		ans = min(ans, posans);
		
	}
	
	for(int i = 0; i<N ; i++){
		ll posans = L;
		if(i > 0)
			posans +=left[i - 1];
		if (i +K < N) 
			posans +=right[i + K];
		ans = min(ans, posans);
		
	}

    return ans;
}
/************/

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