Compilare: user.cpp: In function ‘void dijkstra(int)’: user.cpp:41:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[x].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:96:29: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if(i & (1<<(j-1))!=0) ^ user.cpp:105:50: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if(i & (1<<(t-1))!=0) ^