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