Compilare: user.cpp: In function ‘void bkt()’: user.cpp:35:23: warning: unused variable ‘u’ [-Wunused-variable] int i, j, u, dir; ^ user.cpp: In function ‘int main()’: user.cpp:113:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%d", &N, &M, &I); ^ user.cpp:118:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &x, &y); ^