#include<stdio.h>
int main()
{  int a,b,c=0;
   for(a=1;a<=10;a++)
{         

   for(b=1;a>0;a--)
{  b*=a;
      
}        
   c=c+b;
}
  printf("%d\n",c);
   return 0;
}

#include<stdio.h>
int main()
{
    int a,b,c=0,d=1;
    for(a=1;a<=10;a++)
    {
        for(b=1;b<=a;b++)
        {
            d*=b;
        }
        c=c+d;
        d=1;
    }
    printf("%d\n",c);
    return 0;
}

#include <stdio.h>

unsigned foo( unsigned n )
{
    unsigned s = 0;
    for( ; n!=0; --n )
        s = (s+1)*n;
    return s;
}

int main( void )
{
    printf( "%u\n", foo(10) );
}

4037913

#include<stdio.h>
int main()
{  int a,b = 1,c = 0;
   for(a=1;a<=10;a++)
   {
      b *= a;
      c += b;
   }
   printf("%d\n",c);
   return 0;
}

**********************************
4037913