Delete divide_and_conquer/suffix_array_lcp.py

divide_and_conquer/suffix_array_lcp.py

@@ -1,62 +0,0 @@
-#!/usr/bin/env python3
-
-def build_suffix_array(s: str) -> list[int]:
-    """
-    Build the suffix array for the given string.
-
-    Parameters:
-        s (str): The input string.
-
-    Returns:
-        list[int]: The suffix array (a list of starting indices of
-                    suffixes in sorted order).
-    """
-    suffixes = [(s[i:], i) for i in range(len(s))]
-    suffixes.sort()  # Sort the suffixes lexicographically
-    suffix_array = [suffix[1] for suffix in suffixes]
-    return suffix_array
-
-def build_lcp_array(s: str, suffix_array: list[int]) -> list[int]:
-    """
-    Build the LCP array for the given string and suffix array.
-
-    Parameters:
-        s (str): The input string.
-        suffix_array (list[int]): The suffix array.
-
-    Returns:
-        list[int]: The LCP array.
-    """
-    n = len(s)
-    rank = [0] * n
-    lcp = [0] * n
-
-    # Compute the rank of each suffix
-    for i, suffix_index in enumerate(suffix_array):
-        rank[suffix_index] = i
-
-    # Compute the LCP array
-    h = 0
-    for i in range(n):
-        if rank[i] > 0:
-            j = suffix_array[rank[i] - 1]
-            while (i + h < n) and (j + h < n) and (s[i + h] == s[j + h]):
-                h += 1
-            lcp[rank[i]] = h
-            if h > 0:
-                h -= 1  # Decrease h for the next suffix
-    return lcp
-
-# Example usage
-if __name__ == "__main__":
-    s = "banana"
-    suffix_array = build_suffix_array(s)
-    lcp_array = build_lcp_array(s, suffix_array)
-
-    print("Suffix Array:")
-    for i in range(len(suffix_array)):
-        print(f"{suffix_array[i]}: {s[suffix_array[i]:]}")
-
-    print("\nLCP Array:")
-    for i in range(1, len(lcp_array)):
-        print(f"LCP between {s[suffix_array[i - 1]:]} and {s[suffix_array[i]]}: {lcp_array[i]}")