Eroare de compilare: user.cpp: In function ‘void DFS(int)’: user.cpp:13: warning: comparison between signed and unsigned integer expressions user.cpp:16: error: ‘x’ was not declared in this scope user.cpp: In function ‘int main()’: user.cpp:40: warning: format ‘%I64d’ expects type ‘int’, but argument 2 has type ‘long long int’ user.cpp:25: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:26: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result