Compilare: user.cpp: In function ‘bool bf()’: user.cpp:45:42: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if(!viz[neigh]&p[node][neigh]>fl[node][neigh]) ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~ user.cpp: In function ‘void df(int, int)’: user.cpp:92:45: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if(!passed[next]&abs(p[next][start])>abs(fl[next][start])) ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~ user.cpp: In function ‘int main()’: user.cpp:102:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(size_t i=0;i<m;i++) ~^~ user.cpp:103:69: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if(passed[q[i].first]&passed[q[i].second]&passed[q[i].first]!=passed[q[i].second]) ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~ user.cpp:109:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(size_t i=0;i<nosol;i++) ~^~~~~~