diff --git a/numberFour.py b/numberFour.py
new file mode 100644
index 0000000..5a5ad55
--- /dev/null
+++ b/numberFour.py
@@ -0,0 +1,24 @@
+def repeatedString(s, n):
+    # Write your code here
+    a = 0
+    for word in s:
+        if word == "a":
+            a += 1
+
+    b = n // len(s)
+
+    c = 0
+    last = s[:n % len(s)]
+    for huruf in last:
+        print(huruf)
+        if huruf == "a":
+            c += 1
+
+    hasil = a * b + c
+    return hasil
+
+
+s = "aba"
+n = 10
+result = repeatedString(s, n)
+print(result)
\ No newline at end of file
diff --git a/numberOne.py b/numberOne.py
new file mode 100644
index 0000000..6dda8b5
--- /dev/null
+++ b/numberOne.py
@@ -0,0 +1,18 @@
+def sockMerchant(ar):
+    temp = {}
+    hasil = 0
+
+    for angka in ar:
+        if angka not in temp:
+            temp[angka] = 1
+        else:
+            temp[angka] = temp[angka] + 1
+
+    for total in temp:
+        hasil = hasil + temp[total] // 2
+    return hasil
+
+n = 9
+ar = [10, 20, 20, 10, 10, 30, 50, 10, 20]
+result = sockMerchant(ar)
+print(result)
\ No newline at end of file
diff --git a/numberThree.py b/numberThree.py
new file mode 100644
index 0000000..7c47d51
--- /dev/null
+++ b/numberThree.py
@@ -0,0 +1,24 @@
+
+
+def migratoryBirds(n, arr):
+    # Write your code here
+    bird = [0, 0, 0, 0, 0, 0]
+
+    for number in arr:
+        bird[number] += 1
+
+    maxs = max(bird)
+    for n in range(0, len(bird)):
+        if bird[n] >= maxs:
+            maxs = bird[n]
+
+    index = bird.index(maxs)
+    # print('The index of e:', index)
+
+    return index
+
+
+n = 6
+arr = [1, 4, 4, 4, 5, 3]
+result = migratoryBirds(n, arr)
+print(result)
diff --git a/numberTwo.py b/numberTwo.py
new file mode 100644
index 0000000..6990905
--- /dev/null
+++ b/numberTwo.py
@@ -0,0 +1,25 @@
+def angryProfessor(k, a):
+    # Write your code here
+    temp = 0
+
+    for data in a:
+        if data <= 0:
+            temp += 1
+
+    # print("kapasitas", k)
+    # print("tepat waktu", len(temp))
+    if temp >= k:
+        hasil = "NO"
+    else:
+        hasil = "YES"
+
+    return hasil
+
+
+
+n, k = [4, 3]
+a = [-1, -3, 4, 2]
+result = angryProfessor(k, a)
+print(result)
+
+