0_0_9032681_5331.cpp:10: error: `int exit' redeclared as different kind of symbol
GCC/bin/../lib/gcc/mingw32/3.4.2/../../../../include/stdlib.h:349: error: previous declaration of `void exit(int)'
0_0_9032681_5331.cpp:10: error: declaration of `int exit'
GCC/bin/../lib/gcc/mingw32/3.4.2/../../../../include/stdlib.h:349: error: conflicts with previous declaration `void exit(int)'
0_0_9032681_5331.cpp: In function `int dfs2(int, int)':
0_0_9032681_5331.cpp:19: error: ISO C++ forbids comparison between pointer and integer
0_0_9032681_5331.cpp: In function `int dfs3(int, int)':
0_0_9032681_5331.cpp:60: error: ISO C++ forbids comparison between pointer and integer
0_0_9032681_5331.cpp: In function `int dfs4(int, int)':
0_0_9032681_5331.cpp:100: error: ISO C++ forbids comparison between pointer and integer
0_0_9032681_5331.cpp: In function `int dfs1(int, int)':
0_0_9032681_5331.cpp:141: error: ISO C++ forbids comparison between pointer and integer
0_0_9032681_5331.cpp: In function `int main()':
0_0_9032681_5331.cpp:189: error: ambiguous overload for 'operator>>' in '(+(+(&std::cin)->std::basic_istream<_CharT, _Traits>::operator>> [with _CharT = char, _Traits = std::char_traits<char>](((int&)(&r))))->std::basic_istream<_CharT, _Traits>::operator>> [with _CharT = char, _Traits = std::char_traits<char>](((int&)(&c))))->std::basic_istream<_CharT, _Traits>::operator>> [with _CharT = char, _Traits = std::char_traits<char>](((int&)(&ent))) >> exit'
GCC/bin/../lib/gcc/mingw32/3.4.2/../../../../include/c++/3.4.2/bits/istream.tcc:87: note: candidates are: std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(std::basic_istream<_CharT, _Traits>&(*)(std::basic_istream<_CharT, _Traits>&)) [with _CharT = char, _Traits = std::char_traits<char>] <near match>
GCC/bin/../lib/gcc/mingw32/3.4.2/../../../../include/c++/3.4.2/bits/istream.tcc:93: note: std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(std::basic_ios<_CharT, _Traits>&(*)(std::basic_ios<_CharT, _Traits>&)) [with _CharT = char, _Traits = std::char_traits<char>] <near match>
GCC/bin/../lib/gcc/mingw32/3.4.2/../../../../include/c++/3.4.2/bits/istream.tcc:102: note: std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(std::ios_base&(*)(std::ios_base&)) [with _CharT = char, _Traits = std::char_traits<char>] <near match>
0_0_9032681_5331.cpp:237: error: ISO C++ forbids incrementing a pointer of type `void (*)(int)'
0_0_9032681_5331.cpp:237: error: non-lvalue in increment
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