Leetcode Problem 664. Strange Printer

664. Strange Printer

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Define a helper function solve(left, right) that returns the minimum number of operations needed to print the substring s[left..right].\n2. If dp[left][right] is not -1, return its value as the result has already been computed.\n3. Initialize dp[left][right] with a large value (e.g., the length of the string).\n4. Find the leftmost index j where s[j] differs from s[right].\n5. For each index i from left to right - 1, if s[i] differs from s[right], update dp[left][right] with the minimum of its current value and 1 + solve(j, i) + solve(i + 1, right).\n6. If no such j is found (the substring consists of the same character), set dp[left][right] to 0.\n7. Return dp[left][right].\n8. The final answer is solve(0, n - 1) + 1, where n is the length of the string.

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