int S[1000000];
int ground(int n,int t){
    return (int)((double)n/(double)t);
}
int main()
{
    //freopen("D:\\文件夹\\Desktop\\use.txt","r",stdin);
    int N;scanf("%d",&N);getchar();
    int num = 0;
    memset(S,0,sizeof(S));

    for(int i = 1;i <= N;++i){
        int count = ground(i,2) + ground(i,3) + ground(i,5);
        if( S[count] == 0 ) {S[count] = 1;num++;}
        
    }
    
    cout<<num;

    return 0;
}