0_0_18773683_16277.cpp:3:20: error: expected ';' before ',' token
using namespace std,
^
0_0_18773683_16277.cpp:3:20: error: expected unqualified-id before ',' token
0_0_18773683_16277.cpp:4:1: error: expected unqualified-id before 'int'
int main()
^
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