megascoala.cpp: In function 'void Citeste()': megascoala.cpp:11: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result megascoala.cpp:12: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result megascoala.cpp:16: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result megascoala.cpp: In function 'void Solve()': megascoala.cpp:53: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result megascoala.cpp:23: warning: 'nod1' may be used uninitialized in this function megascoala.cpp:23: warning: 'nod2' may be used uninitialized in this function