N=2,34+3,42+4,23=9,99; pt a=2,b=2,c=4
N=111/25; a+c=b
N=a,bc+b,ca+c,ab=abc/100+bca/100+cab/100
N=(abc+bca+cab)/100
N=111(a+b+c)/100
N=111(b+b)/100
N=111x4/100=111x8/200=111x12/300=111x16/400
N=111/25, deci 2b={4,8,12,16}=>b={2,4,6,8}
a+c=2=>a={0,1,2) si c={2,0,1}
a+c=4=>a={0,1,2,3,4} si c={4,3,2,1,0}
a+c=6=>a={0,1,2,3,4,5,6} si c={6,5,4,3,2,1,0}
a+c=8=>a={0,1,2,3,4,5,6,7,8} si c={8,7,6,5,4,3,2,1,0}
(a,b,c)={(0,2,2),(1,2,1),(2,2,0),(0,4,4),(1,4,3),(2,4,2),(3,4,1),(4,4,0),(0,6,6),(1,6,5),(2,6,4),(3,6,3),(4,6,2),(5,6,1),(6,6,0), (0,8,8),(1,8,7),(2,8,6),(3,8,5),(4,8,4),(5,8,3),(6,8,2),(7,8,1),(8,8,0)}
