scor2.cpp: In function 'bool check(std::string, std::string)': scor2.cpp:20: warning: comparison between signed and unsigned integer expressions scor2.cpp: In function 'int main()': scor2.cpp:40: warning: comparison between signed and unsigned integer expressions scor2.cpp:47: warning: comparison between signed and unsigned integer expressions scor2.cpp:79: warning: comparison between signed and unsigned integer expressions scor2.cpp:26: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result scor2.cpp:27: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result scor2.cpp:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result