emax.cpp: In function 'int main()': emax.cpp:31: warning: comparison between signed and unsigned integer expressions emax.cpp:38: warning: format '%d' expects type 'int', but argument 2 has type 'long long int' emax.cpp:10: warning: unused variable 'j' emax.cpp:11: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result emax.cpp:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result emax.cpp:13: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result emax.cpp:15: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result