Ten numbers 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9 are combined to form three three digit numbers and one one one digit number, and the sum of these four numbers is 999. The maximum three digit number is required to be as small as possible, so what is the maximum three digit number?

Ten numbers 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9 are combined to form three three digit numbers and one one one digit number, and the sum of these four numbers is 999. The maximum three digit number is required to be as small as possible, so what is the maximum three digit number?

Because 999 / 3 = 333, so the hundreds of the three numbers should be 2, 3, 4, so the three digits are relatively small. If the maximum three digits are as small as possible, then the three digits at the beginning of 4 are the smallest, and only 40A sets the three digits