Submission #419524

#	Time	Username	Problem	Language	Result	Execution time	Memory
419524		KalasLavas	Xylophone (JOI18_xylophone)	C++14	0 / 100	2 ms	200 KiB

xylophone

#include <bits/stdc++.h>
#include "xylophone.h"
using namespace std;

mt19937 rng(chrono::system_clock::now().time_since_epoch().count());
//#undef LOCALKL
#define IO \
ios_base::sync_with_stdio(0);(cin).tie(0);(cout).tie(0)
#define y1 y1_
#define prev prev_
#define all(a) (a).begin(),(a).end()
#define pb push_back
#define eb emplace_back
#define F first
#define S second
#ifdef LOCALKL
// #define cerr cerr<<"\33[1;32m"
// #define cout cout<<"\33[0m"
#else
#ifndef OO
#define endl '\n'
#define cerr if(1){}else cerr
#endif
#endif
#define OK cout<<"OK\n"<<endl;
#define setpre(k) fixed<<setprecision(k)
#define mmset(k,y) memset(k,y,sizeof(k))
#define sz(x) ((int)(x).size())
using pii = pair<int,int>;
using pll = pair<long long,long long>;
using ull = unsigned long long;
using intt = long long;
using ll = long long;
using ld = long double;

const ll m9 = 998244353;
const ll m7 = 1000000007;
const ll m18 = 1000000000000000000;
const ll i127 = 2193062143;
const ll l127 = 9187201950435737471;


int n, a[5005], x, s[3];
bool used[5005];
void solve(int N)
{
	n=N;

	int l=1, r=n, mid;
	while(l<r)
	{
		mid=(l+r)>>1;
		if(query(mid, n)!=n-1) r=mid;
		else l=mid+1;
	}
	a[--l] = 1;
	used[1]=1;

	// cerr<<l<<endl;

	x = query(l,l+1) + 1;
	a[l+1] = x;
	used[x]=1;

	// cerr<<" > "<<x<<endl;

	if(l!=1)
	{
		x = query(l-1,l) + 1;
		a[l-1] = x;
		used[x]=1;
		// cerr<<" < "<<x<<endl;
	}
	for(int i=l+2;i<=n;i++)
	{
		x=query(i-1,i);
		// cerr<<x;
		if(a[i-1]-x<=0 or used[a[i-1]-x]) // +
		{
			x=a[i-1]+x;
			a[i] = x;
			used[x]=1;
		}
		else if(n<a[i-1]+x or used[a[i-1]+x])
		{
			x=a[i-1]-x;
			a[i] = x;
			used[x]=1;
		}
		else
		{
			int y = query(i-2, i);
			// cerr<<' '<<y<<endl;
			s[0]=a[i-2];
			s[1]=a[i-1];
			s[2]=a[i-1]+x;
			if(*max_element(a,a+3)-*min_element(a,a+3)==y)
			{
				x=a[i-1]+x;
				a[i] = x;
				used[x]=1;
			}
			else
			{
				x=a[i-1]-x;
				a[i] = x;
				used[x]=1;
			}
		}
		// cerr<<endl;
	}
	
	for(int i=l-2;i>=1;i--)
	{
		x=query(i,i+1);
		// cerr<<x;
		if(a[i+1]-x<=0 or used[a[i+1]-x]) // +
		{
			x=a[i+1]+x;
			a[i] = x;
			used[x]=1;
		}
		else if(n<a[i+1]+x or used[a[i+1]+x])
		{
			x=a[i+1]-x;
			a[i] = x;
			used[x]=1;
		}
		else
		{
			int y = query(i, i+2);
			// cerr<<' '<<y<<endl;
			s[0]=a[i+2];
			s[1]=a[i+1];
			s[2]=a[i+1]+x;
			if(*max_element(a,a+3)-*min_element(a,a+3)==y)
			{
				x=a[i+1]+x;
				a[i] = x;
				used[x]=1;
			}
			else
			{
				x=a[i+1]-x;
				a[i] = x;
				used[x]=1;
			}
		}
		// cerr<<endl;
	}
	// for(int i=1;i<=n;i++) cerr<<a[i]<<',';cerr<<endl;
	for(int i=1;i<=n;i++) answer(i, a[i]);
}
/*
5
2 1 5 3 4
*/

• Subtask 1: 0 / 11
• Subtask 2: 0 / 36
• Subtask 3: 0 / 53