diff --git a/python/Pipfile b/python/Pipfile
index 0f6a6f3..2ae2840 100644
--- a/python/Pipfile
+++ b/python/Pipfile
@@ -10,7 +10,7 @@ mypy = "*"
 flake8 = "*"
 
 [requires]
-python_version = "3.9"
+python_version = "3.11"
 
 [scripts]
 start = "python ./src/main.py"
diff --git a/python/src/main.py b/python/src/main.py
index e37a77c..2aa4b7f 100644
--- a/python/src/main.py
+++ b/python/src/main.py
@@ -2,6 +2,76 @@ def summ(a: int, b: int) -> int:
     return a + b
 
 
+def sum_of_minimums(numbers):
+    result = 0
+    for i in range(len(numbers)):
+        minimum = None
+        for j in range(len(numbers[0])):
+            if (minimum is None or minimum > numbers[i][j]):
+                minimum = numbers[i][j]
+        result += minimum
+    return result
+
+
+def find_all(array, n):
+    result = []
+    for idx, element in enumerate(array):
+        if element == n:
+            result.append(idx)
+    return result
+
+
+def correct_polish_letters(st):
+    st = st.replace('ą', 'a')
+    st = st.replace('ć', 'c')
+    st = st.replace('ę', 'e')
+    st = st.replace('ł', 'l')
+    st = st.replace('ń', 'n')
+    st = st.replace('ó', 'o')
+    st = st.replace('ś', 's')
+    st = st.replace('ź', 'z')
+    st = st.replace('ż', 'z')
+    return st
+
+
+def paperwork(n, m):
+    if n < 0 or m < 0:
+        return 0
+    else:
+        return n * m
+
+
+def monkey_count(n):
+    count = []
+    for i in range(n):
+        count.append(i + 1)
+    return count
+
+
+def hero(bullets, dragons):
+    if bullets < dragons * 2:
+        return False
+    else:
+        return True
+
+
+def even_or_odd(number):
+    if number % 2 == 0:
+        return "Even"
+    else:
+        return "Odd"
+
+
+def count_sheeps(sheep):
+    if sheep is not None:
+        answer = 0
+        for item in sheep:
+            if item:
+                answer += 1
+        return answer
+    return 0
+
+
 if __name__ == "__main__":
     print("Hello world")
     print(summ(3, 4))