#include<stdio.h>
#include<conio.h>

int dem(int n)
{
    int dem=0;
    while(n!= 0)
    {
        n=n/10;
        dem++;
    }
    return dem;
}


main()
{
    int n;
    printf (" Nhap so nguyen n:");
    scanf ("%d", &n);
    printf (" Vay so chu so cua n la:%d",dem(n));
    getch();
    return 0;
}