Compilare: user.cpp: In function ‘int bfs()’: user.cpp:36:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<G[nod].size(); i++) ^ user.cpp: In function ‘void bfsN()’: user.cpp:61:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<G[nod].size(); i++) ^ user.cpp: In function ‘void flux()’: user.cpp:83:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<G[d].size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:125:40: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if( viz[a[p].x]&&viz1[a[p].y]||viz[a[p].y]&&viz1[a[p].x] ) { ^