Is this permutation-sum problem NP-complete?
75804
Is this permutation-sum problem NP-complete?
122504
Factorisations of permutations
45448
Minimum number of $k$-partitions of a set of size $n$ to enumerate all $n \choose k$ combinations
97314
Counting nearly-sorted permutations
69194
Partitioning sum of squares
133497
Group Membership Test for Permutations
108747
A simple permutation question - discrete math
143573
Problem (1.8) A Path to Combinatorics Solution Verification.
107964
Simple combinatorics problem.
626
Sum of combinations with varying $n$
41205
Help me solve a combinatorial problem
56828
A combinatorial proof that the alternating sum of binomial coefficients is zero
104378
Minimizing weighted sum
158124
Sum of all the positive integers problem
93459
Number of permutations of unspecified length
107110
Solving Rubik's cube and other permutation puzzles
61324
Finding the "square root" of a permutation