#include <stdio.h>

double fact( int n );

int main(void)
{
    
        
    int i;
    double sum; 

    sum = 0; 
    for(i = 1; i <= 10; i++) 
        sum = sum + fact(i); 

    printf("1!+2!+...+10! = %f\n", sum); 
    return 0;
}
double fact( int n )
{
    
    
     double c = 1;
     for(int i = 1; i <= n; i++ )
     {
    
    
         c = c * i;
     }
    return c;
}