mese.cpp: In function 'void DFS(int)': mese.cpp:13: warning: comparison between signed and unsigned integer expressions mese.cpp:16: warning: comparison between signed and unsigned integer expressions mese.cpp: In function 'int main()': mese.cpp:40: warning: format '%d' expects type 'int*', but argument 3 has type 'short int*' mese.cpp:31: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result mese.cpp:32: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result mese.cpp:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result mese.cpp:40: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result