0_0_14226505_28405.cpp: In function 'void dfs(int)':
0_0_14226505_28405.cpp:21:21: error: 'begin' was not declared in this scope
for(int v: son[u])
^
0_0_14226505_28405.cpp:21:21: note: suggested alternatives:
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/x86_64-w64-mingw32/bits/stdc++.h:94:0,
from 0_0_14226505_28405.cpp:3:
GCC4.9.2/x86_64-w64-mingw32/include/c++/valarray:1206:5: note: 'std::begin'
begin(const valarray<_Tp>& __va)
^
GCC4.9.2/x86_64-w64-mingw32/include/c++/valarray:1206:5: note: 'std::begin'
0_0_14226505_28405.cpp:21:21: error: 'end' was not declared in this scope
for(int v: son[u])
^
0_0_14226505_28405.cpp:21:21: note: suggested alternatives:
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/x86_64-w64-mingw32/bits/stdc++.h:94:0,
from 0_0_14226505_28405.cpp:3:
GCC4.9.2/x86_64-w64-mingw32/include/c++/valarray:1226:5: note: 'std::end'
end(const valarray<_Tp>& __va)
^
GCC4.9.2/x86_64-w64-mingw32/include/c++/valarray:1226:5: note: 'std::end'
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