trasee.cpp: In function 'void BF(int)': trasee.cpp:21: warning: comparison between signed and unsigned integer expressions trasee.cpp: In function 'bool BFS()': trasee.cpp:40: warning: comparison between signed and unsigned integer expressions trasee.cpp: In function 'int main()': trasee.cpp:70: warning: comparison between signed and unsigned integer expressions trasee.cpp:89: warning: comparison between signed and unsigned integer expressions trasee.cpp:58: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result trasee.cpp:59: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result trasee.cpp:60: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result trasee.cpp:63: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result