335. Self Crossing
Description
You are given an array of integers distance
.
You start at the point (0, 0)
on an X-Y plane, and you move distance[0]
meters to the north, then distance[1]
meters to the west, distance[2]
meters to the south, distance[3]
meters to the east, and so on. In other words, after each move, your direction changes counter-clockwise.
Return true
if your path crosses itself or false
if it does not.
Example 1:
Input: distance = [2,1,1,2] Output: true Explanation: The path crosses itself at the point (0, 1).
Example 2:
Input: distance = [1,2,3,4] Output: false Explanation: The path does not cross itself at any point.
Example 3:
Input: distance = [1,1,1,2,1] Output: true Explanation: The path crosses itself at the point (0, 0).
Constraints:
1 <= distance.length <= 105
1 <= distance[i] <= 105
Solutions
Solution 1
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