Submission #138823

#	Time	Username	Problem	Language	Result	Execution time	Memory
138823		dnass	Boxes with souvenirs (IOI15_boxes)	C++14	50 / 100	2041 ms	27952 KiB

boxes

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

int n, k, l;
vector<int> lhalf, rhalf;
int lsize, rsize;
vector<lld> beg_l, beg_r;

long long delivery(int N, int K, int L, int p[]){
	lld cost = 1e18;
	n = N; k = K; l = L;
	if(n==1) return min((lld)2*p[0], (lld)2*(l-p[0]));
	for(int i=0;i<n&&2*p[i]<=l;i++){
		lhalf.push_back(p[i]);
	}
	lsize = (int) lhalf.size();
	for(int i=n-1;i>=0&&2*(l-p[i])<l;i--){
		rhalf.push_back(l-p[i]);
	}
	rsize = (int) rhalf.size();
	beg_l.push_back(0);
	for(int i=0;i<lsize;i++){
		beg_l.push_back(2*((lld)lhalf[i])+beg_l[max(0, i-k+1)]);
	}
	beg_r.push_back(0);
	for(int i=0;i<rsize;i++){
		beg_r.push_back(2*((lld)rhalf[i])+beg_r[max(0, i-k+1)]);
	}
	for(int i=0;i<rsize+1;i++){
		for(int j=0;j<lsize+1;j++){
			if((n-i-j)%k==0){
				cost = min(cost, ((lld)((n-i-j)/k))*((lld)l)+beg_l[j]+beg_r[i]);
			}
		}
	}
	return cost;
}

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