diff --git "a/\320\233\320\260\320\261\320\276\321\200\320\260\321\202\320\276\321\200\320\275\320\260\321\217 \321\200\320\260\320\261\320\276\321\202\320\260 4/task_1.py" "b/\320\233\320\260\320\261\320\276\321\200\320\260\321\202\320\276\321\200\320\275\320\260\321\217 \321\200\320\260\320\261\320\276\321\202\320\260 4/task_1.py"
new file mode 100644
index 0000000..9f2d083
--- /dev/null
+++ "b/\320\233\320\260\320\261\320\276\321\200\320\260\321\202\320\276\321\200\320\275\320\260\321\217 \321\200\320\260\320\261\320\276\321\202\320\260 4/task_1.py"	
@@ -0,0 +1,12 @@
+# TODO решите задачу
+import json
+
+
+def task() -> float:
+    with open('input.json', 'r') as file:
+        data = json.load(file)
+    product_sum = sum(item["score"] * item["weight"] for item in data)
+    return round(product_sum, 3)
+
+
+print(task())
diff --git "a/\320\233\320\260\320\261\320\276\321\200\320\260\321\202\320\276\321\200\320\275\320\260\321\217 \321\200\320\260\320\261\320\276\321\202\320\260 4/task_2.py" "b/\320\233\320\260\320\261\320\276\321\200\320\260\321\202\320\276\321\200\320\275\320\260\321\217 \321\200\320\260\320\261\320\276\321\202\320\260 4/task_2.py"
new file mode 100644
index 0000000..2077471
--- /dev/null
+++ "b/\320\233\320\260\320\261\320\276\321\200\320\260\321\202\320\276\321\200\320\275\320\260\321\217 \321\200\320\260\320\261\320\276\321\202\320\260 4/task_2.py"	
@@ -0,0 +1,25 @@
+# TODO импортировать необходимые молули
+import json
+import csv
+
+INPUT_FILENAME = "input.csv"
+OUTPUT_FILENAME = "output.json"
+
+
+def task(delimiter=',', line_terminator='\n') -> None:
+    with open(INPUT_FILENAME, newline='') as csvfile:
+        csvreader = csv.DictReader(csvfile, delimiter=delimiter)
+        data = []
+        for row in csvreader:
+            data.append(row)
+            with open(OUTPUT_FILENAME, 'w') as jsonfile:
+                json.dump(data, jsonfile, indent=4)
+
+
+if __name__ == '__main__':
+    # Нужно для проверки
+    task()
+
+    with open(OUTPUT_FILENAME) as output_f:
+        for line in output_f:
+            print(line, end="")