diff --git a/ASSIGNMENTS/ATM Problem solved in Python b/ASSIGNMENTS/ATM Problem solved in Python
new file mode 100644
index 00000000..2a26dc88
--- /dev/null
+++ b/ASSIGNMENTS/ATM Problem solved in Python	
@@ -0,0 +1,12 @@
+t=int(input())
+for _ in range(t):
+    n,k=map(int,input().split())
+    arr=list(map(int,input().split()))
+    s=""
+    for i in range(n):
+        if arr[i]<=k:
+            k-=arr[i]
+            s+='1'
+        else:
+            s+='0'
+    print(s)            
diff --git a/OPEN CHALLENGE/Decimal to Binary and Binary to Decimal b/OPEN CHALLENGE/Decimal to Binary and Binary to Decimal
new file mode 100644
index 00000000..1645d432
--- /dev/null
+++ b/OPEN CHALLENGE/Decimal to Binary and Binary to Decimal	
@@ -0,0 +1,21 @@
+def Binary(n):
+    global s
+    if(n > 1): 
+        Binary(n//2)
+    s+=str(n%2)
+    return s
+
+def decimal(n):
+    n=int(n)
+    deci, i= 0, 0
+    while(n!= 0): 
+        dec = n% 10
+        deci = deci + dec * pow(2, i) 
+        n = n//10
+        i += 1
+    return deci
+
+s=""
+print(Binary(1234))
+print(decimal(11010))
+