题目：

题解：

func canCross(stones []int) bool {
    n := len(stones)
    dp := make([][]bool, n)
    for i := range dp {
        dp[i] = make([]bool, n)
    }
    dp[0][0] = true
    for i := 1; i < n; i++ {
        if stones[i]-stones[i-1] > i {
            return false
        }
    }
    for i := 1; i < n; i++ {
        for j := i - 1; j >= 0; j-- {
            k := stones[i] - stones[j]
            if k > j+1 {
                break
            }
            dp[i][k] = dp[j][k-1] || dp[j][k] || dp[j][k+1]
            if i == n-1 && dp[i][k] {
                return true
            }
        }
    }
    return false
}