Merge pull request #6 from CASPER-REPSAC/neva

Solve 10845, 1406, 1874.py

Author: Nevaland

baekjoon/10845/neva/10845.py

@@ -0,0 +1,49 @@
+from sys import stdin
+
+
+class Queue:
+    def __init__(self):
+        self.queue = list()
+        self.queue_size = 0
+
+    def push(self, x):
+        self.queue.append(x)
+        self.queue_size += 1
+
+    def pop(self):
+        if self.empty():
+            return -1
+        else:
+            self.queue_size -= 1
+            return self.queue.pop(0)
+
+    def size(self):
+        return self.queue_size
+
+    def empty(self):
+        if self.queue_size == 0:
+            return 1
+        else:
+            return 0
+
+    def front(self):
+        if self.empty():
+            return -1
+        else:
+            return self.queue[0]
+
+    def back(self):
+        if self.empty():
+            return -1
+        else:
+            return self.queue[-1]
+
+
+queue = Queue()
+for _ in range(int(stdin.readline())):
+    cmd_args = stdin.readline().split()
+
+    if cmd_args[0] == "push":
+        getattr(queue, cmd_args[0])(cmd_args[1])
+    else:
+        print(getattr(queue, cmd_args[0])())

baekjoon/10866/neva/10866.py

@@ -0,0 +1,41 @@
+from sys import stdin
+
+
+class Editor:
+    def __init__(self, data):
+        self.left_stack = list(data)
+        self.right_stack = list()
+
+    def print(self):
+        print(''.join(self.left_stack + self.right_stack[::-1]))
+
+    def left_cursor(self):
+        if self.left_stack:
+            self.right_stack.append(self.left_stack.pop())
+
+    def right_cursor(self):
+        if self.right_stack:
+            self.left_stack.append(self.right_stack.pop())
+
+    def press(self, data):
+        self.left_stack.append(data)
+
+    def backspace(self):
+        if self.left_stack:
+            self.left_stack.pop()
+
+
+editor = Editor(stdin.readline().strip())
+for _ in range(int(stdin.readline())):
+    cmd_args = stdin.readline().split()
+
+    if cmd_args[0] == "L":
+        editor.left_cursor()
+    elif cmd_args[0] == "D":
+        editor.right_cursor()
+    elif cmd_args[0] == "B":
+        editor.backspace()
+    elif cmd_args[0] == "P":
+        editor.press(cmd_args[1])
+
+editor.print()

baekjoon/1158/neva/1158.py

@@ -0,0 +1,27 @@
+from sys import stdin
+from sys import exit
+
+sequence = list()
+for _ in range(int(stdin.readline())):
+    sequence.append(int(stdin.readline()))
+
+seq_cnt = 1
+delay_stack = [1]
+instructions = ['+']
+
+for seq_value in sequence:
+    if seq_cnt < seq_value:
+        for i in range(seq_cnt + 1, seq_value + 1):
+            delay_stack.append(i)
+            instructions.append('+')
+        seq_cnt = seq_value
+
+    if seq_value <= seq_cnt and delay_stack \
+            and delay_stack[-1] == seq_value:
+        delay_stack.pop()
+        instructions.append('-')
+    else:
+        print("NO")
+        exit(0)
+
+print('\n'.join(instructions))