site.cpp: In function 'int match(int)': site.cpp:15: warning: comparison between signed and unsigned integer expressions site.cpp:22: warning: comparison between signed and unsigned integer expressions site.cpp: In function 'int main()': site.cpp:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result site.cpp:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result site.cpp:40: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result site.cpp:43: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result