Submission #457970

#	Time	Username	Problem	Language	Result	Execution time	Memory
457970		mansur	Rack (eJOI19_rack)	C++14	20 / 100	38 ms	4300 KiB

rack

#include<bits/stdc++.h>

#pragma optimize ("g",on)
#pragma GCC optimize ("Ofast")
#pragma GCC optimize ("unroll-loops")
#pragma GCC optimize ("03")
#pragma GCC target ("sse,sse2,sse3,ssse3,sse4,popcnt,abm,avx2,mmx,fma,avx,tune=native")
             		
using namespace std;

#define all(a) a.begin(), a.end()
#define ll long long
#define pb push_back
#define nl '\n'
#define popb pop_back()
#define sz size()
#define ld long double
#define ull unsigned long long
#define F first
#define S second
#define fix fixed << setprecision
#define pii pair<int, int>
#define E exit (0)
#define int long long

const int inf = (1ll << 62ll), N = 1e6 + 1, mod = 998244353;                    

vector<pii> dd = {{1, 0}, {0, 1}, {-1, 0}, {0, -1}};

int t[N];

void update(int u, int tl, int tr, int pos) {
	if (tl > pos || tr < pos) return;
	if (tl == tr) {
		t[u] = 1;
		return;
	}
	int mid = (tl + tr) / 2;
	update(u * 2, tl, mid, pos);
	update(u * 2 + 1, mid + 1, tr, pos);
	t[u] = t[u * 2] + t[u * 2 + 1];
}

int get(int u, int tl, int tr) {
	if (tl == tr) return tl;
	int mid = (tl + tr) / 2;
	if (t[u * 2 + 1] < t[u * 2]) return get(u * 2 + 1, mid + 1, tr);
	return get(u * 2, tl, mid);
}

signed main() {
	//freopen("invtrans.in", "r", stdin);
	//freopen("invtrans.out", "w", stdout);
	ios_base::sync_with_stdio(NULL);
	cin.tie(NULL);
	int n, k;
	cin >> n >> k;
	n = (1 << n);
	for (int i = 1; i <= k; i++) {
		int pos = get(1, 1, n);
		update(1, 1, n, pos);
		if (i == k) cout << pos;
			
	}
}      

Compilation message (stderr)

rack.cpp:3: warning: ignoring '#pragma optimize ' [-Wunknown-pragmas]
    3 | #pragma optimize ("g",on)
      |

• Subtask 1: 20 / 20
• Subtask 2: 0 / 20
• Subtask 3: 0 / 60