Main.cc: In function 'int main()':
Main.cc:8:13: error: 'std::__cxx11::string {aka class std::__cxx11::basic_string}' has no member named 'strlen'
int n=s.strlen(),y=n;
^
Main.cc:11:18: error: expected primary-expression before '=' token
if(s[i]!==n){
^