#include <iostream>
#include <cmath>

using namespace std;

int main(){
  int n = 0, k = 0;
  int fact = 0;
  float sum1 = 0;
  float sum2 = 0;

  for( k = 1; k <= 10; k++ ){
    sum2 = 0;
    for( n = 1; n <= k; n++ ){
      sum2 += sin( k * n );
    }

    fact = 1;
    for( int i = 1; i <= k; i++ ){
      fact *= i;
    }
    sum1 += ( sum2 / fact );
  }
  cout << sum1 << endl;
}