Submission #96493

#	Time	Username	Problem	Language	Result	Execution time	Memory
96493		KLPP	DEL13 (info1cup18_del13)	C++14	0 / 100	750 ms	132096 KiB

del13

#include<bits/stdc++.h>
 
using namespace std;
int n;
bool done;
bool possible[1000000];
vector<int> seq[1000000];
void DFS(int mask){
	if(possible[mask])return;
	possible[mask]=true;
	int arr[n];
	for(int i=0;i<n;i++){
		arr[i]=((mask&(1<<i))>0);
	}
	int prev[n];
	int next[n];
	prev[0]=-1;
	for(int i=1;i<n;i++){
		if(arr[i-1]==1)prev[i]=prev[i-1];
		else prev[i]=i-1;
	}
	next[n-1]=n;
	for(int i=n-2;i>-1;i--){
		if(arr[i+1]==1)next[i]=next[i+1];
		else next[i]=i+1;
	}
	/*for(int i=0;i<n;i++){
		cout<<prev[i]<<" "<<next[i]<<endl;
	}*/
	for(int i=0;i<n;i++){
		if(arr[i]==0 && prev[i]!=-1 && next[i]!=n){
			int less=(1<<prev[i])+(1<<next[i]);
			if(!possible[mask+less]){
				for(int j=0;j<seq[mask].size();j++)seq[mask+less].push_back(seq[mask][j]);
				seq[mask+less].push_back(i);
				DFS(mask+less);
			}
		}
	}
}

int main(){
	int t;
	cin>>t;
	done=false;
	while(t--){
		cin>>n;
		if(!done){
			for(int i=0;i<(1<<n);i++)possible[i]=false;
			DFS(0);
			/*for(int mask=0;mask<(1<<n);mask++){
				for(int i=0;i<n;i++)cout<<((mask&(1<<i))>0);
				cout<<" "<<possible[mask]<<endl;
			}*/
		}
		int l;
		cin>>l;
		int MSK=(1<<n)-1;
		for(int i=0;i<l;i++){
			int x;
			cin>>x;
			x--;
			MSK-=(1<<x);
		}
		if(possible[MSK]){
			cout<<seq[MSK].size()<<endl;
			for(int i=0;i<seq[MSK].size();i++)cout<<seq[MSK][i]+1<<" ";
			cout<<endl;
		}
		else cout<<-1<<endl;
	}	
	return 0;
}

Compilation message (stderr)

del13.cpp: In function 'void DFS(int)':
del13.cpp:34:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int j=0;j<seq[mask].size();j++)seq[mask+less].push_back(seq[mask][j]);
                 ~^~~~~~~~~~~~~~~~~
del13.cpp: In function 'int main()':
del13.cpp:67:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(int i=0;i<seq[MSK].size();i++)cout<<seq[MSK][i]+1<<" ";
                ~^~~~~~~~~~~~~~~~

• Subtask 1: 0 / 15
• Subtask 2: 0 / 15
• Subtask 3: 0 / 15
• Subtask 4: 0 / 25
• Subtask 5: 0 / 30