Given two vectors of the same size, repeat the values of the first vector the number of times given in a second vector. For example:
x1=[1 2 3 4 5 6];
x2=[2 2 1 1 2 2];
out=[1 1 2 2 3 4 5 5 6 6];
2 b | ~ 2 b
What number has this problem?
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