Compilare: user.cpp: In function ‘int bfs()’: user.cpp:30:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(k=0; k<v[nod].size(); k++) ^ user.cpp: In function ‘void cauta(int, int)’: user.cpp:46:23: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(mu[i].x==a && mu[i].y==b || (mu[i].x==b && mu[i].y==a)) ^ user.cpp: In function ‘void bf(int)’: user.cpp:65:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k=0; k<v[nod].size(); k++) ^ user.cpp: In function ‘int main()’: user.cpp:91:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(k=0; k<v[n].size(); k++) ^ user.cpp:109:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(k=0; k<v[i].size(); k++) ^ user.cpp:112:21: warning: unused variable ‘vertex’ [-Wunused-variable] int vertex=v[i][k]; ^ user.cpp:128:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<sol.size(); i++) ^