first commit

from old repository to a new repository

boj/10866.py

@@ -0,0 +1,42 @@
+from sys import stdin
+from collections import deque
+n=int(stdin.readline().rstrip())
+dq=deque()
+
+for _ in range(n):
+    s=stdin.readline().rstrip().split()
+
+    if len(s)==1:
+        if s[0]=='pop_front':
+            if len(dq)==0:
+                print(-1)
+            else:
+                print(dq.popleft())
+        elif s[0]=='pop_back':
+            if len(dq)==0:
+                print(-1)
+            else:
+                print(dq.pop())
+        elif s[0]=='front':
+            if len(dq)==0:
+                print(-1)
+            else:
+                print(dq[0])
+        elif s[0]=='back':
+            if len(dq)==0:
+                print(-1)
+            else:
+                print(dq[-1])
+        elif s[0]=='size':
+            print(len(dq))
+        else:
+            if len(dq)==0:
+                print(1)
+            else:
+                print(0)
+    else:
+        if s[0]=='push_front':
+            dq.appendleft(int(s[1]))
+        else:
+            dq.append(int(s[1]))
+