3th task

TaskA03/task03.py

@@ -0,0 +1,32 @@
+def is_numeric(s):
+    for char in s:
+        if char < '0' or char > '9': 
+            return False
+    return True
+
+def find_lines_with_date_from_file(filename):
+    result = []
+
+    with open(filename, 'r', encoding='utf-8') as file:
+        lines = file.readlines()
+
+    for line in lines:
+        i = 0
+        while i < len(line):
+            if i + 3 < len(line):
+                year_candidate = line[i:i+4]
+                if is_numeric(year_candidate):
+                    year = int(year_candidate)
+                    if 1900 <= year <= 1999:
+                        if i + 6 < len(line) and line[i+4] == ' ' and line[i+5:i+7] == 'r.':
+                            result.append(line.strip()) 
+                            break  
+            i += 1  
+
+    return result
+
+filename = 'TaskA03/simple.in'  
+output = find_lines_with_date_from_file(filename)
+
+for line in output:
+    print(line)