#include<bits/stdc++.h>
#define int long double
using namespace std;
int n;
int c(int a)
{
    int x=1,y=1;
    for(int i=n;i>=n-a+1;i--)
        x*=i;
    for(int i=1;i<=a;i++)
        y*=i;
    return x/y;
}
signed main()
{
    freopen("binomial.in","r",stdin);
    freopen("binomial.out","w",stdout);
    scanf("%Lf",&n);
    if(n==0)
    {
        printf("1");
        return 0;
    }
    for(int i=0;i<=n;i++)
    {
        if(i!=0) printf("+");
        int d=c(i),a=n-i,b=i;
        if(fabs(d-1)>0.5) printf("%.0Lf",d);
        if(a!=0)
        {
            printf("a");
            if(a!=1)
            printf("^%.0Lf",a); 
        }
        if(b!=0)
        {
            printf("b");
            if(b!=1)
            printf("^%.0Lf",b); 
        }
        
    }
    return 0;
}