Compilare: user.cpp: In function ‘int main()’: user.cpp:32:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < v[vertice].size(); ++j) ^ user.cpp:12:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d%d", &n, &m); ^ user.cpp:16:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d%d", &x, &y); ^