Submission #67717

#	Time	Username	Problem	Language	Result	Execution time	Memory
67717		chpipis	Xylophone (JOI18_xylophone)	C++11	100 / 100	167 ms	716 KiB

xylophone

#include "xylophone.h"
#include <bits/stdc++.h>
 
using namespace std;
 
const int MAXN = 5005;
 
int ar[MAXN];
 
void solve(int n) {
	memset(ar, -1, sizeof ar);
	
	ar[1] = 0;
	ar[2] = query(1, 2);
 
	for (int i = 2; i + 1 <= n; i++) {
		int a = ar[i], b = ar[i - 1];
		int one = query(i, i + 1);
		int two = query(i - 1, i + 1);
		if (a < b) {
			if (a - one + two == b)
				ar[i + 1] = a - one;
			else
				ar[i + 1] = a + one;
		} else {
			if (a + one - two == b)
				ar[i + 1] = a + one;
			else
				ar[i + 1] = a - one;
		}
	}
 
	for (int i = 1; i <= n; i++) {
		for (int j = i + 1; j <= n; j++) {
			if (abs(ar[i] - ar[j]) != n - 1)
				continue;
			int add = 1 - min(ar[i], ar[j]);
			for (int k = 1; k <= n; k++) {
				ar[k] += add;
			}
			if (ar[i] > ar[j]) {
				for (int k = 1; k <= n; k++) {
					ar[k] = n + 1 - ar[k];
				}
			}
		}
	}
 
	for (int i = 1; i <= n; i++) {
		answer(i, ar[i]);
	}
}

• Subtask 1: 11 / 11
• Subtask 2: 36 / 36
• Subtask 3: 53 / 53