58 lines
892 B
Go
58 lines
892 B
Go
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package main
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import "strings"
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func strangePrinter(s string) int {
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mergeConsecutive := func() string {
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withoutConsecutive := strings.Builder{}
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for i := 0; i < len(s); {
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c := s[i]
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withoutConsecutive.WriteByte(c)
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for i < len(s) && s[i] == c {
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i++
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}
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}
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return withoutConsecutive.String()
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}
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compute := func(s string, dp [][]int, length int) {
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for l := 0; l+length-1 < len(s); l++ {
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r := l + length - 1
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dp[l][r] = length
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for mid := 0; mid < length-1; mid++ {
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turns := dp[l][l+mid] + dp[l+mid+1][r]
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if s[l+mid] == s[r] {
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turns--
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}
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dp[l][r] = min(
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dp[l][r],
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turns,
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)
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}
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}
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}
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s = mergeConsecutive()
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n := len(s)
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// Make a DP table
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dp := make([][]int, n)
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for i := range n {
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dp[i] = make([]int, n)
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dp[i][i] = 1
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}
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for length := 2; length <= n; length++ {
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compute(s, dp, length)
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}
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return dp[0][n-1]
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}
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