printf("%d/%d\n",a[i],b[i]);/******************************************************************************
]);
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#include <stdio.h>
#include <stdlib.h>

int factorial (int n);
int per (int n);
int main()
{
    int i,j,a[5000],b[5000],t,sum=1;
    t=3;
    int n[]={2,3,4};

    for (i=0;i<t;i++)
    {
        b[i]=factorial(n[i]);
        sum=0;
        for (j=2;j<n[i];j++)
        {
         sum=sum+per(j);
        }

        a[i]=per(n[i])-sum;
        printf("%d/%d\n",a[i],b[i]);
    }
    return 0;
}

int factorial (int n)
{
    int factorial,i,sum=1;

    for(i=1;i<n+1;i++)
    {
        sum=sum*i;
    }
    return sum;
}

int per (int n)
{
    int per;
    per=factorial(n)/(factorial(n-2));
    return per;
}