first commit

from old repository to a new repository

boj/3273.py

@@ -0,0 +1,24 @@
+import sys
+n=int(sys.stdin.readline().rstrip())
+arr=list(map(int,sys.stdin.readline().rstrip().split()))
+x=int(sys.stdin.readline().rstrip())
+
+count=0
+start=0
+end=n-1
+arr.sort()
+
+while True:
+    if start==end:
+        break
+    
+    res=arr[start]+arr[end]
+    if res==x:
+        count+=1
+        end-=1
+    elif res>x:
+        end-=1
+    else:
+        start+=1
+
+print(count)