题目：

题解：

func minCut(s string) int {
    n := len(s)
    g := make([][]bool, n)
    for i := range g {
        g[i] = make([]bool, n)
        for j := range g[i] {
            g[i][j] = true
        }
    }
    for i := n - 1; i >= 0; i-- {
        for j := i + 1; j < n; j++ {
            g[i][j] = s[i] == s[j] && g[i+1][j-1]
        }
    }

    f := make([]int, n)
    for i := range f {
        if g[0][i] {
            continue
        }
        f[i] = math.MaxInt64
        for j := 0; j < i; j++ {
            if g[j+1][i] && f[j]+1 < f[i] {
                f[i] = f[j] + 1
            }
        }
    }
    return f[n-1]
}