#ifdef STDIO
#include <stdio.h>
#else
#include <iostream>
#include <iomanip>
using namespace std;
#endif
const int VALUES = 30000;                 // # of values to read/write 
int main()
{
  double d; 
  for (int n = 1; n <= VALUES; ++n) {
#ifdef STDIO
    scanf("%lf", &d);
    printf("%10.5f", d);
#else
    cin >> d;
    cout  << setw(10)                     // 设定field宽度
          << setprecision(5)              // 设置小数位置
          << setiosflags(ios::showpoint)  // keep trailing 0s
          << setiosflags(ios::fixed)      // 使用这些设置
          << d;
#endif 
    if (n % 5 == 0) {
#ifdef STDIO
      printf("\n");
#else
      cout << '\n';
#endif
    }
  } 
  return 0;
}

0.00000   0.69315   1.09861   1.38629   1.60944
1.79176   1.94591   2.07944   2.19722   2.30259
2.39790   2.48491   2.56495   2.63906   2.70805
2.77259   2.83321   2.89037   2.94444   2.99573
3.04452   3.09104   3.13549   3.17805   3.21888

cout  << setw(10)
      << setprecision(5)
      << setiosflags(ios::showpoint)
      << setiosflags(ios::fixed)
      << d;