dineu.cpp: In function 'int alt(int)': dineu.cpp:21: warning: no return statement in function returning non-void dineu.cpp: In function 'int main()': dineu.cpp:53: warning: comparison between signed and unsigned integer expressions dineu.cpp:54: warning: comparison between signed and unsigned integer expressions dineu.cpp:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result dineu.cpp:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result dineu.cpp:42: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result dineu.cpp:44: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result dineu.cpp:46: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result