let's solve more as a compensation

easy/find-the-index-of-the-first-occurence-in-string.py

@@ -0,0 +1,35 @@
+#!/usr/bin/python
+# yigid balaban <fyb@fybx.dev>
+# neetcode                      2024
+# easy / find the first occurence in a string
+
+# TC: O(n), MC: O(1)
+def solution(haystack: str, needle: str) -> int:
+    ph, pn = 0, 0
+    position = -1
+    while ph < len(haystack):
+        print(ph, haystack[ph], pn, needle[pn])
+        if haystack[ph] == needle[pn]:
+            if position == -1:
+                position = ph
+            pn += 1
+            if pn == len(needle):
+                break
+        else:
+            if pn != 0:
+                ph = position
+            position, pn = -1, 0
+        ph += 1
+    return position if pn == len(needle) else -1
+
+
+print(solution('sadbutsad', 'sad') == 0)
+print(solution('leetcode', 'lecola') == -1)
+print(solution('leetcode', 'etc') == 2)
+print(solution('a', 'a') == 0)
+print(solution('bbbab', 'ab') == 3)
+print(solution('bbbaaaab', 'ab') == 6)
+print(solution('aa', 'aaa') == -1)
+print(solution('a', 'aaa') == -1)
+print(solution('mississippi', 'issip') == 4)
+