(a-2)*(b+3)=30=1*30=2*15=3*10=5*6=6*5=10*3=15*2=30*1
a-2=1, a =3
b+3=30....b=27 b nu e cifra
a-2=2...a=4
b+3=15...b=12 b nu e cifra
a-2=3...a=5
b+3=10....b=7
a-2=5...a=7
b+3=6...b=3
a-2=6.....a=8
b+3=5....b=2
a-2=10...a=12 a nu e cifra
b+3=3...b=0
a-2=15....a=17
b+3=2...b=-1∉N si nu incercam mai departe pt ca b<0
numerele ab barat sunt deci
57; 73; 82
cum cerinta era suma, atunci
57+73+82=212
