Compilare: user.cpp: In function ‘int dfs(int, int, int)’: user.cpp:81:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:20:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d", &n, &m); ^ user.cpp:26:39: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%c", &cit); ^ user.cpp:48:41: warning: ‘ym’ may be used uninitialized in this function [-Wmaybe-uninitialized] if (x > mb || (x == mb && j < ym)) ^