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Swaps in Permutation problem
Hi all,
I have difficulty on a problem on codeforces http://codeforces.net/problemset/problem/691/D
my submission is : http://codeforces.net/contest/691/submission/19308291
I think my idea is right, I used dsu to group several numbers and downsort numbers inside the groups. But I don't know why I am still wrong answer at test21. The idea is simple, but I can't find what's wrong. Anyone please help me, thanks:D
