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30-phone-directory.cpp
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30-phone-directory.cpp
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// Initial Template for C++
#include <bits/stdc++.h>
using namespace std;
// } Driver Code Ends
// User function Template for C++
class Solution{
public:
vector<vector<string>> displayContacts(int n, string contact[], string s)
{
vector<vector<string>> ans;
vector<string> v;
set<string> directory;
for(int i = 0; i < n; i++)
directory.insert(contact[i]);
for(auto i=directory.begin();i!=directory.end();i++)
{
if((*i)[0] == s[0])
v.push_back(*i);
}
if(v.empty())
v.push_back("0");
ans.push_back(v);
for(int i = 1; i < s.length(); i++)
{
vector<string> curr;
for(int j = 0; j < ans.back().size(); j++)
{
if(ans.back()[j][i] == s[i])
curr.push_back(ans.back()[j]);
}
if(curr.empty())
curr.push_back("0");
ans.push_back(curr);
}
return ans;
}
};
// { Driver Code Starts.
int main(){
int t;
cin>>t;
while(t--){
int n;
cin>>n;
string contact[n], s;
for(int i = 0;i < n;i++)
cin>>contact[i];
cin>>s;
Solution ob;
vector<vector<string>> ans = ob.displayContacts(n, contact, s);
for(int i = 0;i < s.size();i++){
for(auto u: ans[i])
cout<<u<<" ";
cout<<"\n";
}
}
return 0;
} // } Driver Code Ends