0_0_37415536_20211.cpp:4:1: error: expected ',' or ';' before 'using'
using namespace std;
^
0_0_37415536_20211.cpp: In function 'void gauss()':
0_0_37415536_20211.cpp:18:19: error: 'swap' was not declared in this scope
swap(a[tot],a[j]);
^
0_0_37415536_20211.cpp:18:19: note: suggested alternatives:
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/unordered_set:48:0,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/x86_64-w64-mingw32/bits/stdc++.h:116,
from 0_0_37415536_20211.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/unordered_set.h:1325:5: note: 'std::swap'
swap(unordered_multiset<_Value, _Hash, _Pred, _Alloc>& __x,
^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/exception:162:0,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/ios:39,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/istream:38,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/sstream:38,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/complex:45,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/ccomplex:38,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/x86_64-w64-mingw32/bits/stdc++.h:52,
from 0_0_37415536_20211.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/exception_ptr.h:160:5: note: 'std::__exception_ptr::swap'
swap(exception_ptr& __lhs, exception_ptr& __rhs)
^
0_0_37415536_20211.cpp: At global scope:
0_0_37415536_20211.cpp:26:1: error: 'LL' does not name a type
LL solve(LL x)
^
0_0_37415536_20211.cpp: In function 'int main()':
0_0_37415536_20211.cpp:56:25: error: 'solve' was not declared in this scope
printf("%d\n",solve(x));
^
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