Submission #135568

#	Time	Username	Problem	Language	Result	Execution time	Memory
135568		ckodser	Unscrambling a Messy Bug (IOI16_messy)	C++14	100 / 100	17 ms	10080 KiB

messy

#include<bits/stdc++.h>
#include "messy.h"

#define ll int
#define pb push_back
#define mp make_pair
#define ld long double
#define F first
#define S second
#define pii pair<ll,ll>

using namespace :: std;

const ll maxn=2e5+500;
const ll inf=1e9+900;

vector<ll>  vec[maxn];
void bild(ll l,ll r,ll node){
    for(ll i=l;i<r;i++){
	vec[node].pb(i);
    }
    if(l+1==r)return;
    ll mid=(l+r)/2;
    bild(l,mid,2*node);
    bild(mid,r,2*node+1);
}
vector<ll> p[maxn];

vector<int> restore_permutation(int n, int w, int r) {
    bild(0,n,1);
    string base;
    for(ll i=0;i<n;i++){
	base+="0";
    }
    for(ll i=2;i<maxn;i+=2){
	if(vec[i].size()){
	    vector<ll> f;
	    ll v=i/2;
	    while(v!=1){
		for(auto u:vec[v^1]){
		    f.pb(u);
		}
		v/=2;
	    }
	    string s=base;
	    for(auto r:f){
		s[r]='1';
	    }
	    for(auto r:vec[i]){
		s[r]='1';
		add_element(s);
		s[r]='0';
	    }
	}
    }
    compile_set();
    for(ll i=0;i<n;i++){
	p[1].pb(i);
    }
    for(ll i=2;i<maxn;i+=2){
	if(vec[i].size()){
	    vector<ll> f;
	    ll v=i/2;
	    while(v!=1){
		for(auto u:p[v^1]){
		    f.pb(u);
		}
		v/=2;
	    }
	    string s=base;
	    for(auto r:f){
		s[r]='1';
	    }
	    for(auto r:p[i/2]){
		s[r]='1';
		if(check_element(s)){
		    p[i].pb(r);
		}else{
		    p[i^1].pb(r);
		}		
		s[r]='0';
	    }
	}
    }
    vector<ll> ans;
    ans.resize(n);
    for(ll i=0;i<maxn;i++){
	if(vec[i].size()==1){
	    ans[p[i][0]]=vec[i][0];
	}
    }
    return ans;
}

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