Compilare: user.cpp: In function ‘void Solve()’: user.cpp:33:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < G[nod].size(); i++){ ^ user.cpp:36:58: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(V[G[nod][i]] == G[G[nod][i]].size() - 1){ ^ user.cpp:38:55: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0 ; j < G[G[nod][i]].size();j++){ ^ user.cpp: In function ‘int main()’: user.cpp:54:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%hd %hd", &n,&k); ^ user.cpp:56:39: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%hd %hd", &x,&y); ^