pb4

#include <iostream>

using namespace std;

int main()
{
    unsigned x,uc,aux=0,ok=1;
    cout<<"x=";cin>>x;
    while (x!=0&&ok==1) {
        uc=x%10;
        aux=(x/10)%10;
        if (uc<=aux)
           //break;
           ok=0;
           x/=10;
    }

    if (ok)
        cout<<"da";
    else
        cout<<"nu";


return 0;}