Compilare: user.cpp: In function ‘int bfs()’: user.cpp:23:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<v[x].size();i++) { ^ user.cpp: In function ‘int main()’: user.cpp:56:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<v[m].size();i++) { ^ user.cpp:37:17: warning: unused variable ‘minflow’ [-Wunused-variable] int i,j,x,y,minflow; ^