#include <cstdio>
#define MOD (1<<20)
int d[4];
int main(){
    int n, i;
    FILE *fin, *fout;
    fin=fopen("12-perm.in", "r");
    fout=fopen("12-perm.out", "w");
    fscanf(fin, "%d", &n);
    d[1]=1;
    d[2]=2;
    d[3]=6;
    d[0]=12;
    for(i=5; i<=n; i++) d[i&3]=(d[(i-1)&3]+d[(i-3)&3]+2*(i-1))&(MOD-1);
    fprintf(fout, "%d\n", d[n&3]);
    fclose(fin);
    fclose(fout);
    return 0;
}