Submission #96480

#	Time	Username	Problem	Language	Result	Execution time	Memory
96480		KLPP	Hidden Sequence (info1cup18_hidden)	C++14	59 / 100	9 ms	396 KiB

hidden

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

using namespace std;

vector < int > findSequence (int N)
{
	int zeros,ones;
	zeros=-1;
	ones=-1;
	for(int i=1;i<=N/2+1;i++){
		vector<int> query(i);
		for(int j=0;j<i;j++)query[j]=0;
		if(!isSubsequence(query)){
			zeros=i-1;
			i=N/2+1;
		}
	}
	if(zeros!=-1)ones=N-zeros;
	for(int i=1;i<=N/2+1;i++){
		vector<int> query(i);
		for(int j=0;j<i;j++)query[j]=1;
		if(!isSubsequence(query)){
			ones=i-1;
			i=N/2+1;
		}
	}
	if(ones!=-1)zeros=N-ones;
	vector<int> ans;
	if(zeros==0){
		for(int i=0;i<N;i++)ans.push_back(1);
		return ans;
	}
	if(ones==0){
		for(int i=0;i<N;i++)ans.push_back(0);
		return ans;
	}
	vector<int> query;
	int obj=0;
	if(zeros>=ones){
		obj=1;
		swap(ones,zeros);
	}
	//cout<<obj<<" "<<zeros<<" "<<ones<<endl;
	int ones_pos[zeros+1];
	for(int i=0;i<=zeros;i++){
		ones_pos[i]=-1;
		for(int j=1;j<=(ones+1)/2;j++){
			for(int k=0;k<=zeros;k++){
				if(k==i){
					for(int l=0;l<j;l++)query.push_back(1-obj);
				}
				if(k!=zeros)query.push_back(obj);
			}
				//cout<<"I"<<i<<endl;
				//for(int test=0;test<query.size();test++)cout<<query[test]<<" ";
				//cout<<endl;
			if(!isSubsequence(query)){
				ones_pos[i]=j-1;
				j=N;
			}
			query.clear();
		}
			//cout<<ones_pos[i]<<endl;
	}//cout<<endl;
	int minus_one=0;
	for(int i=0;i<=zeros;i++){
		if(ones_pos[i]==-1)minus_one++;
	}
	if(minus_one==1){
		int sum=0;
		for(int i=0;i<=zeros;i++){
			if(ones_pos[i]!=-1)sum+=ones_pos[i];
		}
		for(int i=0;i<=zeros;i++){
			if(ones_pos[i]==-1)ones_pos[i]=ones-sum;
		}
	}else{
		for(int i=0;i<=zeros;i++){
			if(ones_pos[i]==-1)ones_pos[i]=ones/2;
		}
	}
	/*for(int i=0;i<=zeros;i++){
		cout<<ones_pos[i]<<" ";
	}cout<<endl;*/
	for(int i=0;i<=zeros;i++){
		for(int j=0;j<ones_pos[i];j++)ans.push_back(1-obj);
		if(i!=zeros)ans.push_back(obj);	
	}
	
	return ans;
}

Compilation message (stderr)

grader.cpp: In function 'int main()':
grader.cpp:28:43: warning: format '%d' expects argument of type 'int', but argument 3 has type 'std::vector<int>::size_type {aka long unsigned int}' [-Wformat=]
     fprintf (fifo_out, "%d\n", ans.size ());
                                ~~~~~~~~~~~^
grader.cpp:29:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i=0; i<ans.size () && i < N; i++)
                   ~^~~~~~~~~~~~

• Subtask 1: 15 / 20
• Subtask 2: 44 / 80