I dont understand how the cuts are made. int the problem description it says that

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For first cut, the length of rod is 6.
For second cut, the length of sub-rod in which we are making cut is 5(since we already have made a cut at 1).
For third cut, the length of sub-rod in which we are making cut is 4(since we already have made a cut at 2).
if we make the cuts in order as explained than we have 6, 6-1=5, 5-2=3, 3-5=-2(not possible)
so the cost of the third cut should be 3 or am i missing something
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