diff --git a/Pipfile b/Pipfile
new file mode 100644
index 0000000..b5846df
--- /dev/null
+++ b/Pipfile
@@ -0,0 +1,11 @@
+[[source]]
+name = "pypi"
+url = "https://pypi.org/simple"
+verify_ssl = true
+
+[dev-packages]
+
+[packages]
+
+[requires]
+python_version = "3.8"
diff --git a/README.md b/README.md
index 46f9eea..cb1124f 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,3 @@
-# Tprogramming_184_2020
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+# Tprogramming_184_2020
+
+## Valeria Kosyh
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diff --git a/hello.py b/hello.py
new file mode 100644
index 0000000..06d272b
--- /dev/null
+++ b/hello.py
@@ -0,0 +1,47 @@
+import matplotlib.pyplot as plt
+import math
+
+def calc(a, b, x):
+    numerator = math.acos(x**2 - b**2)
+    denomerator = math.asin(x**2 - a**2)
+    y = numerator/denomerator
+
+    return y
+
+def task_a(a, b, xn, xk, dx):
+    x = xn
+    res = []
+
+    while x <= xk:
+        y = calc(a, b, x)
+        res.append((x, y))
+        x += dx
+
+    return res
+
+def task_b(a, b, x_arr):
+    res = []
+
+    for x in x_arr:
+        y = calc(a, b, x)
+        res.append((x, y))
+
+    return res
+
+if __name__ == "__main__" :
+    a = 0.05
+    b = 0.06
+    x = 0.2
+
+    a_res = task_a(a, b, 0.2, 0.95, 0.15)
+    form_a_res = ['%.2f' % x[0] for x in a_res]
+    print(*form_a_res, sep=' ')
+
+    x_arr = [0.15, 0.26, 0.37, 0.48, 0.56]
+    b_res = task_b(a, b, x_arr)
+    form_b_res = ['%.2f' % x[0] for x in b_res]
+    print(*form_b_res, sep=' ')
+
+    plt.plot(*zip(*a_res), 'b')
+    plt.plot(*zip(*b_res), 'r')
+    plt.show()
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