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Hi, I've got a challenge where I want Calc to do something for me. Here I go:

There is a group of ~100 people (n). In 5 time slots they visit 5 rooms in groups of ~20 people (n/5). The composition of the groups should be as different as possible for each time slot. One person may not visit a room more than once.

Suppose Column A contains id's, say 1..100

Col. B contains first time slot room numbers: =INT(RAND()*5+1)

C, D and E contain room numbers for time slot 2, 3 and 4

F contains time slot 5, for row 1: =15-SUM(B1:E1)

Does anyone have a suggestion for C1, D1 and E1?

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