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Gaseste toata numerele de forma abcd cu conditia : a+b+c+d=4.

Răspuns :

-2+1+2+3=4
gata nr diferite
1003,1012,1021,1030,1111,1102.1120,1201,1210,1300,2002,2011,2020,2200,2101,2110,3001,3010,3100,4000