first commit

from old repository to a new repository

boj/1931.py

@@ -0,0 +1,16 @@
+n=int(input())
+arr=[]
+
+for _ in range(n):
+    arr.append(tuple(map(int,input().split())))
+
+arr.sort(key=lambda x:(x[1],x[0]))
+last=0
+count=0
+
+for i in arr:
+    if i[0] >= last:
+        count+=1
+        last=i[1]
+
+print(count)