Compilare: user.cpp: In function ‘int bfs()’: user.cpp:51: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void dfs(int, int)’: user.cpp:67: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int main()’: user.cpp:101: warning: comparison between signed and unsigned integer expressions user.cpp:125: warning: comparison between signed and unsigned integer expressions user.cpp:79: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:81: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:85: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:89: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result