Bai 67

#include <iostream>
using namespace std;

int main()
{
    int n;
    cout << "Nhap n: ";
    cin >> n;
    bool c = false;
    int t = n;
    while (t > 0)
    {
        int dv = t % 10;
        if (dv % 2 != 0)
            c = true;
        t = t / 10;
    }
    if (c)
        cout << "Ton tai chu so le." << endl;
    else
        cout << "Khong ton tai chu so le." << endl;
    return 1;
}