Compilare: main.cpp: In function 'void bfs(std::vector<int>*, int, int, FILE*)': main.cpp:22:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < lg[pp].size(); i++) { ~~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:47:36: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d%d", &n, &m, &src); ^ main.cpp:50:35: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d", &x, &y); ^