Compilare: user.cpp: In function ‘int main()’: user.cpp:10: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:11: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp: In function ‘void inmultesteSOL(long long unsigned int)’: user.cpp:38: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void inmultesteA(long long unsigned int)’: user.cpp:53: warning: comparison between signed and unsigned integer expressions