#include <iostream>
#include <iomanip>
using namespace std;
int main() {
std::cout << std::setprecision(5) << 123.4567890123456789 << '\n';
std::cout << std::setprecision(10) << 123.4567890123456789 << '\n';
std::cout << std::setprecision(20) << 123.4567890123456789 << '\n';
std::cout << std::setprecision(20) << 123.45678 << '\n';
return 0;
}
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