HDU-6630(打表找规律)(2019hdu多校第五场1007 permutation 2)
Problem Description
You are given three positive integersN,x,y.
Please calculate how many permutations of1∼Nsatisfies the following conditions (We denote thei-th number of a permutation bypi):
1...
原创
2019-08-06 14:38:40 ·
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