Submission #758046

#	Time	Username	Problem	Language	Result	Execution time	Memory
758046		alexander707070	Unscrambling a Messy Bug (IOI16_messy)	C++14	100 / 100	4 ms	500 KiB

messy

#include<bits/stdc++.h>
#include "messy.h"
#define MAXN 10007
using namespace std;
 
int nn;
string curr,zero;
int perm[MAXN];
bool in[MAXN];
vector<int> ans,v;
 
void question(){
	curr="";
	for(int i=0;i<nn;i++){
		if(in[i])curr+="1";
		else curr+="0";
	}
	add_element(curr);
}

void ask(int l,int r){
    if(l==r)return;

	int mid=(l+r)/2;
	for(int i=l;i<=mid;i++){
		in[i]=true;
		question();
		in[i]=false;
	}

	for(int i=mid+1;i<=r;i++)in[i]=true;
	ask(l,mid);
	for(int i=mid+1;i<=r;i++)in[i]=false;

	for(int i=l;i<=mid;i++)in[i]=true;
	ask(mid+1,r);
	for(int i=l;i<=mid;i++)in[i]=false;
}

bool answer(){
	curr="";
	for(int i=0;i<nn;i++){
		if(in[i])curr+="1";
		else curr+="0";
	}
	return check_element(curr);
}

void solve(int l,int r,vector<int> poss){
	if(l==r){
		perm[poss[0]]=l; return;
	}

	vector<int> ll,rr;
	for(int i=0;i<poss.size();i++){
		in[poss[i]]=true;		

		if(answer())ll.push_back(poss[i]);
		else rr.push_back(poss[i]);

		in[poss[i]]=false;
	}

	int mid=(l+r)/2;

	for(int i:rr)in[i]=true;
	solve(l,mid,ll);
	for(int i:rr)in[i]=false;

	for(int i:ll)in[i]=true;
	solve(mid+1,r,rr);
	for(int i:ll)in[i]=false;
}

vector<int> restore_permutation(int N, int w, int r){
    nn=N;
	ask(0,nn-1);
	compile_set();

	for(int i=0;i<nn;i++)v.push_back(i);
	solve(0,nn-1,v);

	for(int i=0;i<nn;i++){
		ans.push_back(perm[i]);
	}

	return ans;
}
 
/*
int main(){
 
}
*/

Compilation message (stderr)

messy.cpp: In function 'void solve(int, int, std::vector<int>)':
messy.cpp:55:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   55 |  for(int i=0;i<poss.size();i++){
      |              ~^~~~~~~~~~~~

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