Wrong Answer
/in/foo.cc: In function 'void dfs2(int, long long int)':
/in/foo.cc:29:21: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
if(ans<v||v==ans&&x<nd) ans=v,nd=x;
~~~~~~^~~~~~
/in/foo.cc: In function 'void dfs2(int, long long int)':
/in/foo.cc:29:21: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
if(ans<v||v==ans&&x<nd) ans=v,nd=x;
~~~~~~^~~~~~
