Compilare: user.cpp: In function ‘void DFS(int, int)’: user.cpp:12:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[nod].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:47:20: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] else if(a[val]==mx&p1>x){mx=a[val];p1=x;p2=y;} ^ user.cpp:48:20: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] else if(a[val]==mx&p1==x&&p2>y){mx=a[val];p1=x;p2=y;} ^ user.cpp:30:12: warning: unused variable ‘t2’ [-Wunused-variable] {int i,x,y,t2; ^