README.md

942. DI String Match

Given a string S that only contains "I" (increase) or "D" (decrease), let N = S.length.

Return any permutation A of [0, 1, ..., N] such that for all i = 0, ..., N-1:

• If S[i] == "I", then A[i] < A[i+1]
• If S[i] == "D", then A[i] > A[i+1]

Example 1:

Input: "IDID" Output: [0,4,1,3,2] 

Example 2:

Input: "III" Output: [0,1,2,3] 

Example 3:

Input: "DDI" Output: [3,2,0,1] 

Note:

1. 1 <= S.length <= 10000
2. S only contains characters "I" or "D".

Solutions (Python)

1. Solution

classSolution: defdiStringMatch(self, S: str) ->List[int]: b, e=0, len(S) A= [] fordiinS: ifdi=='I': A.append(b) b+=1elifdi=='D': A.append(e) e-=1A.append(b) returnA