Compilare: user.cpp: In function ‘int main()’: user.cpp:31:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < A[n].size(); i++) ^ user.cpp: In function ‘bool BFS()’: user.cpp:68:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < A[nod].size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:21:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &n, &m); ^ user.cpp:24:42: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%d", &x, &y, &z); ^