Compilare: user.cpp: In function ‘void coboara(int)’: user.cpp:44:15: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] if(pos<<1 +1 <=nh && h[ok].cost > h[pos<<1 + 1].cost) ^ user.cpp:44:48: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] if(pos<<1 +1 <=nh && h[ok].cost > h[pos<<1 + 1].cost) ^ user.cpp: In function ‘int main()’: user.cpp:115:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<a[v].size(); ++i){ ^ user.cpp:85:15: warning: unused variable ‘j’ [-Wunused-variable] int n,m,i,j,x,y,z; ^ user.cpp:89:8: warning: unused variable ‘q’ [-Wunused-variable] QQ q; ^