Otherwise, print a line containing $N$ space-separated integers denoting the elements of $Q$. Constraintsįor each test case, if such a permutation $Q$ does not exist, print a line containing the integer $-1$. The second line contains $N$ space-separated integers $P_1,P_2,\dots, P_N$.If no such index exists, the permutation is the last permutation. Find the highest index i such that si < si+1. It changes the given permutation in-place. Quoting: The following algorithm generates the next permutation lexicographically after a given permutation. Starting with the identity permutation and.
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