Compilare: user.cpp: In function ‘void bfs(int, int)’: user.cpp:13:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[k].size();i++) ^ user.cpp:15:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[k].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:34:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[x].size();i++) ^ user.cpp:38:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[x].size();i++) ^ user.cpp:45:55: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(q[i][q[i].size()-1]==y) if(q[i].size()<minn) minn=q[i].size(); ^ user.cpp:48:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[x].size();i++) ^ user.cpp:49:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(q[i].size()==minn) ^ user.cpp:52:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<q[i].size()-1;j++) ^