Depth First Traversal for a Graph

PROBLEM :
Write a function to print the depth first traversal for a graph from a given source s.

Input:
The task is to complete the function DFS which takes 3 arguments an integer denoting the starting node (s) of the dfs travel , a  graph (g)  and an array of visited nodes (vis)  which are initially all set to false .
There are multiple test cases. For each test case, this method will be called individually.

Output:
The function should print the depth first traversal for the graph from the given source.

Note : The expected output button always produces DFS starting from node 1.

Constraints:
1 <=T<= 100
1 <=Number of  edges<= 100

Example:
Input:
1
4
1 2 1 3 1 4 3 5

Output:
1 2 3 5 4    //dfs from node 1

--------------------------------------------------------------------------------
SIMPLE c++ IMPLEMENTATION :
--------------------------------------------------------------------------------

/* You have to complete this function
which prints out the depth first level traversal of the
graph starting from node s
the vector<int> g[i] represent the adjacency
list of the ith node of the graph
 */

void dfs(int s, vector<int> g[], bool vis[])
{
    vis[s]=true ;
    cout<<s<<" " ;
   
    vector<int>::iterator i ;
    for(i=g[s].begin();i!=g[s].end();i++)
    {
        if(vis[*i]==false)
            dfs(*i,g,vis) ;
    }
}

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