0_0_28993978_16589.cpp: In function 'int main()':
0_0_28993978_16589.cpp:30:18: error: could not convert '(((void)std::operator>><char, std::char_traits<char>, std::allocator<char> >((* & std::cin), (* & s))), s)' from 'std::string {aka std::basic_string<char>}' to 'bool'
while(cin>>s,s){
^
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