#include <iostream>
#include <string>
using namespace std;
class A
{
private:
static std::string s;
public:
void modify_string();
};
std::string A::s = "default";
void A::modify_string()
{
s = "something"; // Error here.
}
int main() {
A a;
a.modify_string();
// your code goes here
return 0;
}
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