URI Problem 1161 Solution Factorial Sum - URI Online Judge Solution

 

URI Online Judge Solution 1161 Factorial Sum Using C, Python Programming Language.

Read two numbers M and N indefinitely. Calculate and write the sum of their factorial. Be carefull, because the result can have more than 15 digits.

Input

The input file contains many test cases. Each test case contains two integer numbers M (0 ≤ M ≤ 20) and N (0 ≤ N ≤ 20). The end of file is determined by eof.

Output

For each test case in the input your program must print a single line, containing a number that is the sum of the both factorial (M and N).

Input Sample	Output Sample
4 4 0 0 0 2	48 2 3

Solution Using C:

#include<stdio.h>

unsigned long long Fact(int x)

{

    if(x==0) return 1;

    unsigned long long n=1;

    while(x>0)

    {

        n = n*x;

        x--;

    }

    return n;

}

int main()

{

    int m,n;

    while(scanf("%d%d",&m,&n) != EOF)

    {

        unsigned long long x;

        x = Fact(m)+Fact(n);

        printf("%llu\n",x);

    }

    return 0;

}