How can i input adjacency list in this ques a 2d matrix is given

#1

https://practice.geeksforgeeks.org/problems/eulerian-path-in-an-undirected-graph/0/?category[]=Graph&page=1&query=category[]Graphpage1#

#2

in the matrix where you have 1
suppose at mat(i,j ) ==1 then join i to j
adj[i].push_back(j);

#3

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