Compilare: user.cpp: In function ‘void solve()’: user.cpp:69: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int count()’: user.cpp:98: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void read()’: user.cpp:118: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:119: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:121: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:125: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result