public class Solution extends Object
936 - Stamping The Sequence.
Hard
You are given two strings stamp and target. Initially, there is a string s of length target.length with all s[i] == '?'.
In one turn, you can place stamp over s and replace every letter in the s with the corresponding letter from stamp.
stamp = "abc" and target = "abcba", then s is "?????" initially. In one turn you can:
stamp at index 0 of s to obtain "abc??",stamp at index 1 of s to obtain "?abc?", orstamp at index 2 of s to obtain "??abc".Note that stamp must be fully contained in the boundaries of s in order to stamp (i.e., you cannot place stamp at index 3 of s).
We want to convert s to target using at most 10 * target.length turns.
Return an array of the index of the left-most letter being stamped at each turn. If we cannot obtain target from s within 10 * target.length turns, return an empty array.
Example 1:
Input: stamp = “abc”, target = “ababc”
Output: [0,2]
Explanation: Initially s = “?????”. - Place stamp at index 0 to get “abc??”. - Place stamp at index 2 to get “ababc”.
[1,0,2] would also be accepted as an answer, as well as some other answers.
Example 2:
Input: stamp = “abca”, target = “aabcaca”
Output: [3,0,1]
Explanation: Initially s = “???????”. - Place stamp at index 3 to get “???abca”. - Place stamp at index 0 to get “abcabca”. - Place stamp at index 1 to get “aabcaca”.
Constraints:
1 <= stamp.length <= target.length <= 1000stamp and target consist of lowercase English letters.| Constructor and Description |
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Solution() |
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