diff --git a/pyExercise/ex1/app1.py b/pyExercise/ex1/app1.py
index 9d8b4c6..f1f6d94 100644
--- a/pyExercise/ex1/app1.py
+++ b/pyExercise/ex1/app1.py
@@ -1 +1,79 @@
 print("this is app1 version 0.1")
+print("this will switch to version 0.2")
+
+#ex1
+'''
+for i in range(1,5):
+    for j in range(1,5):
+        for k in range(1,5):
+            if (i!=j and j!=k and i!=k):
+                print(i,j,k)
+'''
+
+#ex2
+'''
+import math
+for i in range(10000):
+    x=int(math.sqrt(i+100))
+    y=int(math.sqrt(i+268))
+    if(x*x==i+100 and y*y==i+268):
+        print("result: %d"%i)
+        break
+'''
+
+#ex3
+'''
+li=[]
+for i in range(3):
+    x=int(input("input integer:"))
+    li.append(x)
+li.sort()
+print(li)
+'''
+
+#ex4
+'''
+i=input("input number:")
+number=int(i)
+li=[]
+for it in range(0,number+1):
+    li.append(True)
+    
+li[0]=False
+li[1]=False
+li[2]=False
+for i in range(2,number+1):
+    j=i
+    mult=2
+    while j<number+1:
+        j=i*mult
+        mult+=1
+        if j<number+1:
+            li[j]=False
+for i in range(1,number+1):
+    if li[i]==True:
+        print(i)
+'''
+
+#ex5
+'''
+i=input("input number:")
+number=int(i)
+for n in range(1,number):
+    tmp=n
+    li=[]
+    while tmp!=0:
+        tmp2=tmp%10
+        li.append(tmp2)
+        tmp=tmp//10
+    count=0
+    for elem in li:
+        count+=elem**3
+    if count==n:
+        print(n)
+'''
+
+
+    
+    
+