feat: 添加多个新的算法题实现，包括字符串最后一个单词长度、字符出现次数、朋友们的喜好和密码游戏

Author: tkzzzzzz6

niuke/problems/华为机试/HJ1.字符串最后一个单词的长度.py

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+# @nc app=nowcoder id=8c949ea5f36f422594b306a2300315da topic=37 question=21224 lang=Python3
+# 2026-04-26 19:40:38
+# https://www.nowcoder.com/practice/8c949ea5f36f422594b306a2300315da?tpId=37&tqId=21224
+# [HJ1] 字符串最后一个单词的长度
+
+# @nc code=start
+
+
+a = input().split()
+print(len(a[-1]))
+
+
+# @nc code=end

niuke/problems/华为机试/HJ2.计算某字符出现次数.py

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+'''
+Author: tkzzzzzz6
+Date: 2026-04-26 19:45:14
+LastEditors: tkzzzzzz6
+LastEditTime: 2026-04-26 20:10:59
+'''
+# @nc app=nowcoder id=a35ce98431874e3a820dbe4b2d0508b1 topic=37 question=21225 lang=Python3
+# 2026-04-26 19:45:14
+# https://www.nowcoder.com/practice/a35ce98431874e3a820dbe4b2d0508b1?tpId=37&tqId=21225
+# [HJ2] 计算某字符出现次数
+
+# @nc code=start
+
+import sys, math
+from collections import deque, defaultdict, Counter
+import heapq, bisect
+input = lambda: sys.stdin.readline().rstrip()
+
+def solve():
+    s = input().lower()
+    c = input().lower()
+    cnt = {}
+    print(s.count(c))
+
+if __name__ == "__main__":
+    t = 1
+    # t = int(input())
+    for _ in range(t):
+        solve()
+
+
+# @nc code=end

niuke/problems/牛客题霸-python入门到实践四十招/NP27.朋友们的喜好.py

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+'''
+Author: tkzzzzzz6
+Date: 2026-04-26 20:13:26
+LastEditors: tkzzzzzz6
+LastEditTime: 2026-04-26 20:15:05
+'''
+# @nc app=nowcoder id=c62ef46892ef4c478802df983f8624b7 topic=314 question=2549745 lang=Python3
+# 2026-04-26 20:13:26
+# https://www.nowcoder.com/practice/c62ef46892ef4c478802df983f8624b7?tpId=314&tqId=2549745
+# [NP27] 朋友们的喜好
+
+# @nc code=start
+
+import sys, math
+from collections import deque, defaultdict, Counter
+import heapq, bisect
+input = lambda: sys.stdin.readline().rstrip()
+
+def solve():
+    res = []
+    name = ['Niumei', 'YOLO', 'Niu Ke Le', 'Mona']
+    food = ['pizza', 'fish', 'potato', 'beef']
+    nums = [3, 6, 0, 3]
+
+    res.append(name)
+    res.append(food)
+    res.append(nums)
+
+    print(res)
+
+if __name__ == "__main__":
+    t = 1
+    # t = int(input())
+    for _ in range(t):
+        solve()
+
+
+# @nc code=end

niuke/problems/牛客题霸-python入门到实践四十招/NP28.密码游戏.py

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+'''
+Author: tkzzzzzz6
+Date: 2026-04-26 20:15:54
+LastEditors: tkzzzzzz6
+LastEditTime: 2026-04-26 20:16:05
+'''
+# @nc app=nowcoder id=36641ab168664384aff798ba7ce34bc1 topic=314 question=2583410 lang=Python3
+# 2026-04-26 20:15:54
+# https://www.nowcoder.com/practice/36641ab168664384aff798ba7ce34bc1?tpId=314&tqId=2583410
+# [NP28] 密码游戏
+
+# @nc code=start
+
+import sys, math
+from collections import deque, defaultdict, Counter
+import heapq, bisect
+input = lambda: sys.stdin.readline().rstrip()
+
+def solve():
+    s = input().strip()
+    a = [str((int(c) + 3)%9) for c in s]
+    a[0],a[2] = a[2],a[0]
+    a[3],a[1] = a[1],a[3]
+
+    print("".join(a))
+
+    
+
+if __name__ == "__main__":
+    t = 1
+    # t = int(input())
+    for _ in range(t):
+        solve()
+
+
+# @nc code=end