0_0_16270680_6640.cpp: In function 'int main()':
0_0_16270680_6640.cpp:54:29: error: 'memset' was not declared in this scope
memset(dfn,0,sizeof(dfn));
^
0_0_16270680_6640.cpp:72:5: error: 'sort' is not a member of 'std'
std::sort(chk.begin(),chk.end());
^
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