//{ Driver Code Starts
// 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)
    {
     unordered_map<string,set<string>> mp;
     
     for(int i = 0;i<n;i++){
         string str = contact[i];
         string temp = "";
         for(int j = 0;j<str.size();j++){
             temp = temp + str[j];
             cout<<temp<<endl;
             mp[str].insert(temp);
         }
     }
     
    vector<vector<string>> ans;
     
    // string temp = "";
    // for(int i = 0;i<s.size();i++){
    //     temp = temp + s[i];
    //     vector<string> v;
    //     for(int j = 0;j<n;j++){
    //         string str = contact[i];
    //         if(mp[str].find(temp) != mp[str].end()){
    //             v.push_back(str);
    //         }
    //     }
    //     if(v.size() == 0){
    //         v.push_back("0");
    //     }
    //     ans.push_back(v);
    // }
     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

C++ Online Compiler

Write, Run & Share C++ code online using OneCompiler's C++ online compiler for free. It's one of the robust, feature-rich online compilers for C++ language, running on the latest version 17. Getting started with the OneCompiler's C++ compiler is simple and pretty fast. The editor shows sample boilerplate code when you choose language as C++ and start coding!

Read inputs from stdin

OneCompiler's C++ online compiler supports stdin and users can give inputs to programs using the STDIN textbox under the I/O tab. Following is a sample program which takes name as input and print your name with hello.

#include <iostream>
#include <string>
using namespace std;

int main() 
{
    string name;
    cout << "Enter name:";
    getline (cin, name);
    cout << "Hello " << name;
    return 0;
}

About C++

C++ is a widely used middle-level programming language.

  • Supports different platforms like Windows, various Linux flavours, MacOS etc
  • C++ supports OOPS concepts like Inheritance, Polymorphism, Encapsulation and Abstraction.
  • Case-sensitive
  • C++ is a compiler based language
  • C++ supports structured programming language
  • C++ provides alot of inbuilt functions and also supports dynamic memory allocation.
  • Like C, C++ also allows you to play with memory using Pointers.

Syntax help

Loops

1. If-Else:

When ever you want to perform a set of operations based on a condition If-Else is used.

if(conditional-expression) {
   //code
}
else {
   //code
}

You can also use if-else for nested Ifs and If-Else-If ladder when multiple conditions are to be performed on a single variable.

2. Switch:

Switch is an alternative to If-Else-If ladder.

switch(conditional-expression){    
case value1:    
 // code    
 break;  // optional  
case value2:    
 // code    
 break;  // optional  
......    
    
default:     
 code to be executed when all the above cases are not matched;    
}

3. For:

For loop is used to iterate a set of statements based on a condition.

for(Initialization; Condition; Increment/decrement){  
  //code  
}

4. While:

While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.

while (condition) {  
// code 
}

5. Do-While:

Do-while is also used to iterate a set of statements based on a condition. It is mostly used when you need to execute the statements atleast once.

do {  
 // code 
} while (condition);

Functions

Function is a sub-routine which contains set of statements. Usually functions are written when multiple calls are required to same set of statements which increases re-usuability and modularity. Function gets run only when it is called.

How to declare a Function:

return_type function_name(parameters);

How to call a Function:

function_name (parameters)

How to define a Function:

return_type function_name(parameters) {  
 // code
}