Solve string problems

Author: Nevaland

baekjoon/11720/neva/11720.py

@@ -0,0 +1,4 @@
+from sys import stdin
+
+stdin.readline()
+print(sum(map(int, list(stdin.readline().strip()))))

baekjoon/1316/neva/1316.py

@@ -0,0 +1,22 @@
+from sys import stdin
+
+words_num = int(stdin.readline())
+
+def is_group_word(word):
+  pre = ''
+  pre_chars = []
+  for char in word:
+    if pre != char:
+      if char not in pre_chars:
+        pre_chars.append(char)
+      else:
+        return False
+      pre = char
+  return True
+
+cnt_group_word = 0
+for _ in range(words_num):
+  if is_group_word(stdin.readline().strip()):
+    cnt_group_word += 1
+
+print(cnt_group_word)

baekjoon/3029/neva/3029.py

@@ -0,0 +1,21 @@
+from sys import stdin
+
+now_h, now_m, now_s = map(int, stdin.readline().strip().split(':'))
+throw_h, throw_m, throw_s = map(int, stdin.readline().strip().split(':'))
+
+now_time = now_h * 3600 + now_m * 60 + now_s
+throw_time = throw_h * 3600 + throw_m * 60 + throw_s
+wait_time = throw_time - now_time
+
+if wait_time < 0:
+  wait_time += 86400
+elif wait_time == 0:
+  wait_time = 86400
+
+wait_h = wait_time // 3600
+wait_time -= wait_h * 3600
+wait_m = wait_time // 60
+wait_time -= wait_m * 60
+wait_s = wait_time
+
+print("%02d:%02d:%02d" % (wait_h, wait_m, wait_s))

baekjoon/9046/neva/9046.py

@@ -0,0 +1,20 @@
+from sys import stdin
+
+string_num = int(stdin.readline())
+
+for _ in range(string_num):
+  chars = {}
+  string = list(stdin.readline().strip())
+
+  for char in string:
+    if char in chars:
+      chars[char] += 1
+    elif ' ' != char:
+      chars[char] = 1
+
+  max_values = [k for k, v in chars.items() if max(chars.values()) == v]
+  
+  if 1 < len(max_values):
+    print("?")
+  else:
+    print(max_values[0])