Compilare: user.cpp: In function ‘void read_points()’: user.cpp:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘void read_rect()’: user.cpp:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘void solve()’: user.cpp:91: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘int bin_y_right(int, int)’: user.cpp:208: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int bin_y_left(int, int)’: user.cpp:171: warning: ‘sol’ may be used uninitialized in this function user.cpp: In function ‘int bin_y_right(int, int)’: user.cpp:200: warning: ‘sol’ may be used uninitialized in this function