1182. Shortest Distance to Target Color
https://leetcode.com/problems/shortest-distance-to-target-color
Description
You are given an array colors
, in which there are three colors: 1
, 2
and 3
.
You are also given some queries. Each query consists of two integers i
and c
, return the shortest distance between the given index i
and the target color c
. If there is no solution return -1
.
Example 1:
**Input:** colors = [1,1,2,1,3,2,2,3,3], queries = [[1,3],[2,2],[6,1]]
**Output:** [3,0,3]
**Explanation:**
The nearest 3 from index 1 is at index 4 (3 steps away).
The nearest 2 from index 2 is at index 2 itself (0 steps away).
The nearest 1 from index 6 is at index 3 (3 steps away).
Example 2:
**Input:** colors = [1,2], queries = [[0,3]]
**Output:** [-1]
**Explanation:** There is no 3 in the array.
Constraints:
1 <= colors.length <= 5*10^4
1 <= colors[i] <= 3
1 <= queries.length <= 5*10^4
queries[i].length == 2
0 <= queries[i][0] < colors.length
1 <= queries[i][1] <= 3
ac
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