diff --git a/app/main.py b/app/main.py
index fa56336e..8ba808b0 100644
--- a/app/main.py
+++ b/app/main.py
@@ -1 +1,26 @@
-# write your code here
+import matplotlib.pyplot as plt
+import random
+
+
+def flip_coin() -> dict:
+    result = {i: 0.0 for i in range(11)}
+    for _ in range(10000):
+        flip_res = [random.choice([0, 1]) for _ in range(10)]
+        head = sum(flip_res)
+        result[head] += 1
+
+    for key in result:
+        result[key] = round((result[key] / 10000) * 100, 2)
+
+    return result
+
+
+def draw_gaussian_distribution_graph(result: dict) -> None:
+    x_ = list(result.keys())
+    y_ = list(result.values())
+
+    plt.plot(x_, y_)
+    plt.title("Gaussian Distribution")
+    plt.xlabel("Heads count")
+    plt.ylabel("Drop percentage")
+    plt.show()
diff --git a/requirements.txt b/app/requirements.txt
similarity index 88%
rename from requirements.txt
rename to app/requirements.txt
index 3f202d6e..afff6807 100644
--- a/requirements.txt
+++ b/app/requirements.txt
@@ -3,4 +3,4 @@ flake8-annotations==2.9.1
 flake8-quotes==3.3.1
 flake8-variables-names==0.0.5
 pep8-naming==0.13.2
-pytest==7.1.3
+pytest==7.1.3
\ No newline at end of file