Блог пользователя wish_me

Автор wish_me, история, 7 лет назад, По-английски

While I was solving this DP ,

http://codeforces.net/contest/73/problem/C

I think we can do it by 3d-DP.But I am able to make only two states dp[i][j][?] where i is currently index and j is how many letters we can change.Can any one suggest me the third state or the approach??

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