Extra ques please help

#1

my code->

why its giving seg fault or something like that…??
its a simple dfs although in cout it shows correct order (see eg test case 2)

#2

hello @hg11110000

   for(auto x:m[src])
            {
                string temp=x;
                m[src].erase(x);
                dfs(temp);
            }

here u r iterating and erasing at the same time. this may create an issue.

#3

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