Submission #1302045

#TimeUsernameProblemLanguageResultExecution timeMemory
1302045vtnooUnscrambling a Messy Bug (IOI16_messy)C++20
100 / 100
2 ms588 KiB
#include <bits/stdc++.h>
#define pb push_back
#define fst first
#define snd second
#define fore(i,a,b) for(int i=a,pao=b;i<pao;++i)
#define SZ(x) ((int)x.size())
#define ALL(x) x.begin(),x.end()
#define mset(a,v) memset((a),(v),sizeof(a))
#define FIN ios::sync_with_stdio(0);cin.tie(0);cout.tie(0)
using namespace std;
typedef long long ll;
void add_element(std::string x);
bool check_element(std::string x);
void compile_set();
vector<int>ans;
void ins(int l,int m,int r,int n){
	string s(n,'0');
	fore(i,r+1,n){
		s[i]='1';
	}
	fore(i,0,l){
		s[i]='1';
	}
	fore(i,l,m+1){
		s[i]='1';
		add_element(s);
		s[i]='0';
	}	
}
void rec1(int l,int r,int n){
	if(l==r)return;
	int m=(l+r)/2;
	ins(l,m,r,n);
	rec1(l,m,n);rec1(m+1,r,n);
}
void rec2(int l,int r,int n,vector<int>p){
	if(l==r){
		ans[p[0]]=l;
		return;
	}
	int n_=SZ(p);
	string s(n,'1');
	fore(i,0,n_){
		s[p[i]]='0';
	}
	vector<int>pl,pr;
	fore(i,0,n_){
		s[p[i]]='1';
		if(check_element(s)){
			pl.push_back(p[i]);
		}else{
			pr.push_back(p[i]);
		}
		s[p[i]]='0';
	}
	int m=(l+r)/2;
	rec2(l,m,n,pl);rec2(m+1,r,n,pr);
}
std::vector<int> restore_permutation(int n, int w, int r){
	rec1(0,n-1,n);
	compile_set();
	ans.resize(n);
	vector<int>p(n);
	iota(ALL(p),0);
	rec2(0,n-1,n,p);
	return ans;
}

Compilation message (stderr)

messy.h:1:9: warning: #pragma once in main file
    1 | #pragma once
      |         ^~~~
messy_c.h:1:9: warning: #pragma once in main file
    1 | #pragma once
      |         ^~~~
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