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  1. #include <iostream>
  2. #include <iostream> // std::cout
  3. #include <limits> // std::numeric_limits
  4. using namespace std;
  5.  
  6. int main() {
  7. std::cout << std::numeric_limits<long double>::digits10 << std::endl;
  8. return 0;
  9. }
Success #stdin #stdout 0s 3296KB
stdin
Standard input is empty
stdout
18