#include <cstdio>

#define MOD 999017
#define MAXN 1000

int d[MAXN+1];

int main(){
    int n, i, j, fact;
    FILE *fin, *fout;
    fin=fopen("sortari2.in", "r");
    fout=fopen("sortari2.out", "w");
    fscanf(fin, "%d", &n);
    fact=1;
    for(i=2; i<=n; i++) fact=fact*i%MOD;
    d[1]=1;
    for(i=2; i<=n; i++){
        d[i]=2*d[i-1];
        for(j=i-2; j>=0; j--) d[i]+=d[j];
        d[i]%=MOD;
    }
    fprintf(fout, "%d\n", (fact-d[n]+MOD)%MOD);
    fclose(fin);
    fclose(fout);
    return 0;
}