Compilare: user.cpp: In function ‘void read()’: user.cpp:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘void solve()’: user.cpp:48: warning: comparison between signed and unsigned integer expressions user.cpp:69: warning: format ‘%d’ expects type ‘int’, but argument 3 has type ‘cp2’ user.cpp:69: warning: too few arguments for format