#include <iostream.h>

float f[]={20,57,87,92,68,
           46,16, 9, 4, 1};
float e[]={19.4717, 58.8534, 88.9421, 89.6092, 
           67.7110, 40.9313, 20.6191,  8.9030, 
            3.3637, 1.1296};

main(){
  float sum = 0;

  for(int i = 0; i < 10; i++)
    sum += (e[i]-f[i])*(e[i]-f[i])/e[i];

  cout << sum;
}