Submission #1254943

#TimeUsernameProblemLanguageResultExecution timeMemory
1254943thdh__도서관 (JOI18_library)C++20
100 / 100
119 ms432 KiB
#include <bits/stdc++.h>
#include "library.h"
#define ll long long
#define pb push_back
#define eb emplace_back
#define pu push
#define ins insert
#define fi first
#define se second
#define all(a) a.begin(),a.end()
#define bruh ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define fu(x,a,b) for (auto x=a;x<=b;x++)
#define fd(x,a,b) for (auto x=a;x>=b;x--)

using namespace std;
//mt19937 mt(chrono::steady_clock::now().time_since_epoch().count());

/*
Competitive Programming notes that I need to study & fix my dumbass self:

1. Coding:
- Always be sure to check the memory of arrays (maybe use vectors), for loops
- Always try to maximize the memory if possible, even if you are going for subtasks
- Do not exploit #define int long long, it will kill you

2. Stress:
- Always try generating big testcases and try if they run

3. Time management:
- Don't overcommit or undercommit, always spend a certain amount of time to think a problem, don't just look at it and say I'm fucked
- Do not spend too much time coding brute-force solutions, they should be easily-codable solutions that don't take up too much time

Time management schedule:
Offline / LAH days (4 problems - 3h):
15' thinking of solution / idea
1. no idea: skip
2. yes idea: continue thinking for <= 15'

+ implementing: <= 20'
+ brute-force: <= 5'
+ test generator: <= 5'

I hate offline because I am dumb
*/

typedef pair<int, int> ii;
const int N = 2e5+5;
const int B = 750;
const int mod = 1e9+7;
const int inf = 2e9;
using cd = complex<double>;
const long double PI = acos(-1);
int power(int a,int b) {ll x = 1;if (a >= mod) a%=mod; while (b) {if (b & 1) x = x*a % mod;a = a*a % mod;b>>=1;}return x;}

/*
int Query(vector<int> a)
{
	cout<<"? ";
	for (auto i : a) cout<<i<<" ";
	cout<<endl;
	int ret;
	cin>>ret;;
	return ret;
}

void Answer(vector<int> a)
{
	cout<<"! ";
	for (auto i : a) cout<<i<<" ";
	cout<<endl;
}
*/

void Solve(int N)
{
	if (N == 1)
	{
		Answer({1});
		return;
	} else if (N == 2)
	{
		Answer({1, 2});
		return;
	}
	int n = N;
	vector<int> ans;
	vector<int> q(N, 1);
	for (int i = 1; i <= n; i++)
	{
		q[i-1] = 0;
		if (Query(q) == 1)
		{
			ans.pb(i); break;
		}
		q[i-1] = 1;
	}
	vector<int> q1(N, 0), q2(N, 0);
	q1[ans[0]-1] = 1;
	vector<int> rem;
	for (int i = 1; i <= n; i++) if (i != ans[0]) rem.pb(i);
	for (int i = 1; i < n; i++)
	{
		int l = 0, r = rem.size()-1, res;
		while (l <= r)
		{
			int mid = l+r>>1;
			for (int j = 0; j <= mid; j++) q1[rem[j]-1] = q2[rem[j]-1] = 1;
			int v1 = Query(q1), v2 = Query(q2);
			if (v1 == v2) res = mid, r = mid-1;
			else l = mid+1;
			for (int j = 0; j <= mid; j++) q1[rem[j]-1] = q2[rem[j]-1] = 0;
		}
		ans.pb(rem[res]);
		q1[ans.back()-1] = 1;
		rem.erase(rem.begin()+res);
	}
	Answer(ans);
}

/*
Go through the mistakes you usually make and revise your code, for god's sake...
*/

/*
signed main()
{
	int n;
	cin>>n;
	Solve(n);
}
*/
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