제출 #237876

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
237876		crossing0ver	선물상자 (IOI15_boxes)	C++17	10 / 100	5 ms	384 KiB

boxes

#include<bits/stdc++.h>
#define ll long long 
//#include "boxes.h"
using namespace std;
const int MAXN = 1e7+5;
ll L[MAXN], R[MAXN],dis[MAXN];
void F(int P[],int n,int k,ll X[]) {
	for (int i = 0; i < n; i++) {
		if (i % k == k - 1) {           
			 X[i] = 2*P[i]  + ( i >= k ? X[i-k] : 0);
		}
		else X[i] = 2*P[i]   + ( i >= k ? X[i - (i + 1)%k] : 0);
	}
}
ll delivery(int n, int k, int le, int P[]) {
	sort (P,P+n);
	reverse(P,P+n);
	for (; n > 0 && P[n-1] == 0; n--);
//	if (n == 0) return 0;
	reverse(P,P+n);
	
	
//	ll sum_L = 0;
	F(P,n,k,L);
	
	for (int i = 0; i < n; i++)  P[i] = ( (le - P[i])%le );
	reverse(P,P+n);
	
	F(P,n,k,R);
	reverse(P,P+n);
	for (int i = 0; i < n; i++)  P[i] = ( (le - P[i])%le );
//	cout << L[0] << ' ';
	
	ll ans = min(L[n-1],R[n-1]);
	
//	for (int i = 0; i < n; i++) {
//		ans = min(ans,L[i] + (le - P[i]) - P[i] + (i + 2 <= n? R[n - i - 2] : 0 ));
//		ans = min(ans,R[(n - i - 1)] + P[i] - ( le - P[i] ) + (i ? L[i-1] : 0));
//	}
//	ans = min(ans,L[n-1] +  (le - P[n-1]) - P[n-1]);
//	ans = min(ans,R[n-1] +  P[0] - (le - P[0]));
	for (int i = 0; i < n; i++) {
		ans = min(ans,L[i] + ( i != n-1 ? R[n - i - 2] : 0) );
	}
	return ans;
}       /*     
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) ;
//	 cout <<' '<< R[0] << ' '<<R[1] <<' '<<R[2];
	//   3 2 8 1 2 5
	
}       */

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