I want to implement DFS, BFS using vector of vectors. Can someone help me with that? I have never code using vector, so it is a bit tough for me i guess.

Do not guess, if you never used vector before, do some tests, read some examplesâ€¦

void bfs(int s,vector adj[],bool vis[])

can someone help me ? how can i find the size of adj[] ?

Refer Geeks for Geeks for graph+stl solutions. Here is the link for dfs using vectors http://www.geeksforgeeks.org/graph-implementation-using-stl-for-competitive-programming-set-1-dfs-of-unweighted-and-undirected/

i have read it already. i am not able to write code for Dfs and bfs using it.

If you can do it with arrays you can do it with vectors. If you canâ€™t do it with arrays you need to learn dfs/bfs and solve some questions.

yaâ€¦ i think you are right. but thanks anywaysâ€¦

Try to solve this problem - http://www.codechef.com/problems/PETERSEN using BFSâ€¦

We can help you if you got stucked

Try to solve this problem - http://www.codechef.com/problems/FIRESC (DFS) also

Well you have probably made a 2D vector and size of adj[i] (i.e no. of columns of a particular row) can be found simply using â€śadj[i].size()â€ť whereas the size of adj[] (i.e. no. of rows of 2D vector) has to be passed in the function!

Dude, see the date.