jungla.cpp: In function 'void read()': jungla.cpp:62: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result jungla.cpp:63: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result jungla.cpp:64: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result jungla.cpp:67: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result jungla.cpp: In function 'int BFS(int)': jungla.cpp:107: warning: suggest explicit braces to avoid ambiguous 'else' jungla.cpp:117: warning: suggest explicit braces to avoid ambiguous 'else' jungla.cpp: In function 'void write_solution()': jungla.cpp:193: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result jungla.cpp: In function 'void determine_cycle3(int, int)': jungla.cpp:162: warning: 'pozx' may be used uninitialized in this function jungla.cpp:162: warning: 'pozy' may be used uninitialized in this function