diff --git a/soal1.py b/soal1.py
new file mode 100644
index 0000000..f93267c
--- /dev/null
+++ b/soal1.py
@@ -0,0 +1,43 @@
+#!/bin/python3
+
+import math
+import os
+import random
+import re
+import sys
+
+#
+# Complete the 'sockMerchant' function below.
+#
+# The function is expected to return an INTEGER.
+# The function accepts following parameters:
+#  1. INTEGER n
+#  2. INTEGER_ARRAY ar
+#
+
+def sockMerchant(n, ar):
+    socks={}
+    count=0
+    
+    for i in ar:
+        if i not in socks:
+            socks[i]=1
+            continue
+        socks[i]+=1
+    
+    for i in socks.values():
+        count+=i//2
+    return count    
+
+if __name__ == '__main__':
+    fptr = open(os.environ['OUTPUT_PATH'], 'w')
+
+    n = int(input().strip())
+
+    ar = list(map(int, input().rstrip().split()))
+
+    result = sockMerchant(n, ar)
+
+    fptr.write(str(result) + '\n')
+
+    fptr.close()
\ No newline at end of file
diff --git a/soal2.py b/soal2.py
new file mode 100644
index 0000000..11f09b6
--- /dev/null
+++ b/soal2.py
@@ -0,0 +1,49 @@
+#!/bin/python3
+
+import math
+import os
+import random
+import re
+import sys
+
+#
+# Complete the 'angryProfessor' function below.
+#
+# The function is expected to return a STRING.
+# The function accepts following parameters:
+#  1. INTEGER k
+#  2. INTEGER_ARRAY a
+#
+
+def angryProfessor(k, a):
+    present=0;
+    
+    for i in a:
+        if i<=0:
+            present+=1;
+            
+    if(present<k):
+        return "YES";
+    else:
+        return "NO";
+        
+
+if __name__ == '__main__':
+    fptr = open(os.environ['OUTPUT_PATH'], 'w')
+
+    t = int(input().strip())
+
+    for t_itr in range(t):
+        first_multiple_input = input().rstrip().split()
+
+        n = int(first_multiple_input[0])
+
+        k = int(first_multiple_input[1])
+
+        a = list(map(int, input().rstrip().split()))
+
+        result = angryProfessor(k, a)
+
+        fptr.write(result + '\n')
+
+    fptr.close()
diff --git a/soal3.py b/soal3.py
new file mode 100644
index 0000000..e69de29
diff --git a/soal4.py b/soal4.py
new file mode 100644
index 0000000..82d7e00
--- /dev/null
+++ b/soal4.py
@@ -0,0 +1,44 @@
+#!/bin/python3
+
+import math
+import os
+import random
+import re
+import sys
+
+#
+# Complete the 'repeatedString' function below.
+#
+# The function is expected to return a LONG_INTEGER.
+# The function accepts following parameters:
+#  1. STRING s
+#  2. LONG_INTEGER n
+#
+
+def repeatedString(s, n):
+    total=0
+    
+    for i in s:
+        if i == 'a':
+            total += 1
+            
+    total = n//len(s) * total
+    
+    for i in s[:n%len(s)]:
+        if i == 'a':
+            total += 1
+            
+    return total
+
+if __name__ == '__main__':
+    fptr = open(os.environ['OUTPUT_PATH'], 'w')
+
+    s = input()
+
+    n = int(input().strip())
+
+    result = repeatedString(s, n)
+
+    fptr.write(str(result) + '\n')
+
+    fptr.close()