megascoala.cpp: In function 'int main()': megascoala.cpp:57: warning: comparison between signed and unsigned integer expressions megascoala.cpp:30: warning: unused variable 'm' megascoala.cpp:30: warning: unused variable 'n1' megascoala.cpp:30: warning: unused variable 'n2' megascoala.cpp:30: warning: unused variable 'c' megascoala.cpp:28: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result megascoala.cpp:29: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result megascoala.cpp:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result megascoala.cpp:35: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result megascoala.cpp:30: warning: 'sol2' may be used uninitialized in this function megascoala.cpp:30: warning: 'sol1' may be used uninitialized in this function