Compilare: user.cpp: In function ‘void DFS(int, int, int)’: user.cpp:28: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int main()’: user.cpp:66: warning: cannot pass objects of non-POD type ‘struct std::pair<double, double>’ through ‘...’; call will abort at runtime user.cpp:66: warning: format ‘%lf’ expects type ‘double’, but argument 2 has type ‘int’ user.cpp:66: warning: too few arguments for format user.cpp:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:49: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:65: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result