Submission #1312384

#	Time	Username	Problem	Language	Result	Execution time	Memory
1312384		Zbyszek99	Library 3 (JOI24_library3)	C++20	100 / 100	530 ms	448 KiB

library3

#include "library3.h"
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define ll long long
#define ld long double
#define ull unsigned long long
#define ff first
#define ss second
#define pii pair<int,int>
#define pll pair<long long, long long>
#define vi vector<int>
#define vl vector<long long>
#define pb push_back
#define rep(i, b) for(int i = 0; i < (b); ++i)
#define rep2(i,a,b) for(int i = a; i <= (b); ++i)
#define rep3(i,a,b,c) for(int i = a; i <= (b); i+=c)
#define count_bits(x) __builtin_popcountll((x))
#define all(x) (x).begin(),(x).end()
#define siz(x) (int)(x).size()
#define forall(it,x) for(auto& it:(x))
using namespace __gnu_pbds;
using namespace std;
typedef tree<int, null_type, less<int>, rb_tree_tag,tree_order_statistics_node_update> ordered_set;
//mt19937 mt;void random_start(){mt.seed(chrono::time_point_cast<chrono::milliseconds>(chrono::high_resolution_clock::now()).time_since_epoch().count());}
//ll los(ll a, ll b) {return a + (mt() % (b-a+1));}
const int INF = 1e9+50;
const ll INF_L = 1e18+40;
const ll MOD = 1e9+7;

int cur_ans;
vi ans;

bool compare(int a, int b)
{
    if(a == b) return 0;
    if(a == 0) return 1;
    if(b == 0) return 0;
    swap(ans[0],ans[a]);
    swap(ans[0],ans[b]);
    bool x = (query(ans) != cur_ans);
    swap(ans[0],ans[b]);
    swap(ans[0],ans[a]);
    return x;
}

vi merge_sort(vi x)
{
    if(siz(x) <= 1) return x;
    vi l;
    vi r;
    rep(i,siz(x)/2) l.pb(x[i]);
    rep2(i,siz(x)/2,siz(x)-1) r.pb(x[i]);
    l = merge_sort(l);
    r = merge_sort(r);
    vi ans;
    int p1 = 0;
    int p2 = 0;
    while(p1 != siz(l) || p2 != siz(r))
    {
        if(p1 == siz(l)) ans.pb(r[p2++]);
        else if(p2 == siz(r)) ans.pb(l[p1++]);
        else
        {
            if(compare(l[p1],r[p2])) ans.pb(l[p1++]);
            else ans.pb(r[p2++]);
        }
    }
    return ans;
}

void solve(int n) 
{
    ans.resize(n);
    rep(i,n) ans[i] = i;
    cur_ans = query(ans);
    rep2(i,1,n-1)
    {
        swap(ans[0],ans[i]);
        int new_ans = query(ans);
        if(new_ans < cur_ans) swap(ans[0],ans[i]);
        else cur_ans = new_ans;
    }
    vi x;
    rep(i,n) x.pb(i);
    x = merge_sort(x);
    vi ans2(n);
    rep(i,n) ans2[x[(i+1)%n]] = ans[x[i]];
    answer(ans2);
}

• Subtask 1: 2 / 2
• Subtask 2: 19 / 19
• Subtask 3: 79 / 79