Submission #254933

#	Time	Username	Problem	Language	Result	Execution time	Memory
254933		ChrisT	Unscrambling a Messy Bug (IOI16_messy)	C++17	100 / 100	2 ms	512 KiB

messy

#include <bits/stdc++.h>
#include "messy.h"
using namespace std;
int n; vector<int> ret;
void build (int l, int r) {
	if (l == r) return;
	string go = string(n,'0');
	for (int i = l; i <= r; i++) go[i] = '1';
	int mid = (l + r) / 2;
	for (int i = l; i <= mid; i++) {
		go[i] = '0';
		add_element(go);
		go[i] = '1';
	}
	build(l,mid); build(mid+1,r);
}
void solve (int l, int r, vector<int> &wot) {
	if (l == r) return (void) (ret[wot[0]] = l);
	vector<int> wotL, wotR;
	string go = string(n,'0');
	for (int i : wot) go[i] = '1';
	for (int i : wot) {
		go[i] = '0';
		if (check_element(go)) wotL.push_back(i);
		else wotR.push_back(i);
		go[i] = '1';
	}
	int mid = (l + r) / 2;
	solve(l,mid,wotL); solve(mid+1,r,wotR);
}
vector<int> restore_permutation (int N, int w, int r) {
	n=N;
	vector<int> go(n); iota(go.begin(),go.end(),0); ret.resize(n);
	build(0,n-1);
	compile_set();
	solve(0,n-1,go);
	return ret;
}

• Subtask 1: 20 / 20
• Subtask 2: 18 / 18
• Subtask 3: 11 / 11
• Subtask 4: 21 / 21
• Subtask 5: 30 / 30