a≠0
b={0,1,2,3.......9}
a=1, c=2, b=0....9 ⇒ 10 numere, 102,112,122, 132,142,152,162,172,182,192
a=2, c=1, b=........ ⇒ 10 numere, 201,211,221,231,241,251,261,271,281,291
a=3, c=0, b=........ ⇒ 10 numere, 300,310,320,330,340,350,360,370,380,390
daca mai gasesti ceva in plus sa-mi spui si mie.
