jungla.cpp: In function 'int BFS(int)': jungla.cpp:119: warning: comparison between signed and unsigned integer expressions jungla.cpp:140: warning: suggest explicit braces to avoid ambiguous 'else' jungla.cpp:150: warning: comparison between signed and unsigned integer expressions jungla.cpp:152: warning: suggest explicit braces to avoid ambiguous 'else' jungla.cpp: In function 'int main()': jungla.cpp:162: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result jungla.cpp:163: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result jungla.cpp:165: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result jungla.cpp:167: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result jungla.cpp: In function 'void FindCycle3(int, int)': jungla.cpp:55: warning: 'index1' may be used uninitialized in this function jungla.cpp:55: warning: 'index2' may be used uninitialized in this function