Compilare: user.cpp: In function ‘int DFS(int, int)’: user.cpp:108:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘void readFile()’: user.cpp:46:30: 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:52:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d%d", &a, &b); ^