diff --git a/sy5-3.py b/sy5-3.py
deleted file mode 100644
index f187490..0000000
--- a/sy5-3.py
+++ /dev/null
@@ -1,19 +0,0 @@
-from math import sqrt
-def isPrime(n):
-        m=int(sqrt(n))
-        for i in range(2,m+1):
-                if n%i ==0:
-                        return False
-        return True
-def countPrimes(start,end):
-       cnt=0
-       for i in range(start,end+1):
-               if(isPrime(i)):
-                       cnt+=1;
-
-       return cnt
-
-#主程序
-for start in range(1,1000,100):
-        print("%3d-%4d 有%d个素数"%\
-              (start,start+99,countPrimes(start,start+99)))