Compilare: user.cpp: In function ‘void DFS(int, int, int)’: user.cpp:36: warning: comparison between signed and unsigned integer expressions user.cpp:37: warning: comparison between signed and unsigned integer expressions user.cpp:69: warning: comparison between signed and unsigned integer expressions user.cpp:70: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int main()’: user.cpp:113: warning: comparison between signed and unsigned integer expressions user.cpp:124: warning: comparison between signed and unsigned integer expressions user.cpp:126: warning: comparison between signed and unsigned integer expressions user.cpp:96: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:97: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:99: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:102: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result