664. Strange Printer LeetCode Solution | Easy Approach

Minimum Cost to Merge Stones
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Strange Printer There is a strange printer with the following two special properties:

  • The printer can only print a sequence of the same character each time.
  • At each turn, the printer can print new characters starting from and ending at any place and will cover the original existing characters.

Given a string s, return the minimum number of turns the printer needed to print it.

Example 1:

Input: s = "aaabbb"
Output: 2
Explanation: Print "aaa" first and then print "bbb".

Example 2:

Input: s = "aba"
Output: 2
Explanation: Print "aaa" first and then print "b" from the second place of the string, which will cover the existing character 'a'.

Constraints:

  • 1 <= s.length <= 100
  • s consists of lowercase English letters.

Strange Printer Solutions

Time: O(n)
Space: O(n)

C++

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