🏣 Clean up for arxiv

book/ebook_src/builtin_structures/ransom_note.py

@@ -0,0 +1,34 @@
+#!/usr/bin/env python
+
+__author__ = "bt3"
+
+
+
+from collections import Counter
+
+def check_if_ransom_note(magazines, note):
+    count = Counter()
+    pm, pn = 0, 0
+
+    while pn < len(note) and pm < len(magazines):
+        char_note = note[pn]
+        if count[char_note]>0:
+            count[char_note] -= 1
+            pn += 1
+        else:
+            char_magazine = magazines[pm]
+            count[char_magazine] += 1
+            pm +=1
+
+    return pn == len(note)
+
+
+
+if __name__ == '__main__':
+
+    magazines1 = "avfegthhgrebvkdsvnijnvyijfdmckdsmovkmmfvskumvl;cdkmioswckofjbkreenyukjemjgnmkmvkmnvdkmvkr g gmvdvmldm vldfkmbldkmlvdkm"
+    magazines2 = "adfsfa"
+    note = "you should disobey"
+
+    print(check_if_ransom_note(magazines1, note))
+    print(check_if_ransom_note(magazines2, note))