3.3.18

#include <iostream>
#include <cmath>
#include <iomanip>

using namespace std;
int main()
{
    int x, a, b;
    x = 10;
    while (x != 100) {
        a = x % 10;
        b = x / 10;
        if ((b > a) && (((a + 1) == b) || (a == b))) {
            cout << x << " ";
        }
        x++;
    }

    x = 10;

    do {
        a = x % 10;
        b = x / 10;
        if ((b > a) && (((a + 1) == b) || (a == b))) {
            cout << x << " ";
        }
        x++;
    }
    while (x != 100);

    for (int i = 10; i != 100; i++) {
        a = x % 10;
        b = x / 10;
        if ((b > a) && ((a + 1) == b || (a == b))) {
            cout << x << " ";
        }
    }
    return 0;
}