upgrade to python3;add some validator examples

examples/multi_solution_validator.py

@@ -0,0 +1,58 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+"""
+多解答案验证程序
+适用于有多个正确答案的题目，如排序、排列等
+使用: python multi_solution_validator.py input.txt expected.txt result.txt
+"""
+
+import sys
+import re
+
+
+def main():
+    if len(sys.argv) != 4:
+        print("WA")
+        return
+    
+    try:
+        # 读取标准答案
+        with open(sys.argv[2], 'r') as f:
+            expected = f.read().strip()
+        
+        # 读取用户输出
+        with open(sys.argv[3], 'r') as f:
+            result = f.read().strip()
+        
+        # 去除多余的空白字符
+        expected = re.sub(r'\s+', ' ', expected)
+        result = re.sub(r'\s+', ' ', result)
+        
+        # 解析数字
+        try:
+            expected_nums = list(map(int, expected.split()))
+            result_nums = list(map(int, result.split()))
+        except ValueError:
+            print("WA")
+            return
+        
+        # 检查数量是否相同
+        if len(expected_nums) != len(result_nums):
+            print("WA")
+            return
+        
+        # 检查是否包含相同的元素（允许不同的排列）
+        if sorted(expected_nums) != sorted(result_nums):
+            print("WA")
+            return
+        
+        # 如果需要检查特定的排序顺序，可以添加额外的验证
+        # 这里我们接受任何包含相同元素的排列
+        print("AC")
+        
+    except Exception:
+        print("WA")
+
+
+if __name__ == "__main__":
+    main()