#include <bits/stdc++.h>
using namespace std;
#define int long long
int n,ans[20],flag,len=1;
signed main(){
    // freopen(".in","r",stdin);
    // freopen(".out","w",stdout);
    cin>>n;
    ans[1]=1;
    for (int i=1;i<=n;i++){
        for (int j=1;j<=12;j++){
            ans[j]*=i;
        }
        flag=1;
        for (int j=1;j<=12;j++){
            if(ans[j]>=10) len=max(len,j+1);
            ans[j+1]+=ans[j]/10;
            ans[j]%=10;
            flag&=(ans[j]==0);
        }
        if(flag) break;
    }
    len=min(len,12ll);
    for (int i=len;i>=1;i--) cout<<ans[i];
    return 0;
}