adding python solution

inclusao-de-subintervalos/src/saad.py

@@ -0,0 +1,29 @@
+import sys
+
+
+def main() -> None:
+    data = list(map(int, sys.stdin.buffer.read().split()))
+    n = data[0]
+
+    intervals = []
+    index = 1
+    for _ in range(n):
+        left = data[index]
+        right = data[index + 1]
+        intervals.append((left, right))
+        index += 2
+
+    intervals.sort(key=lambda interval: (interval[0], -interval[1]))
+
+    last_covered = intervals[0][1]
+    count = 1
+    for _, right in intervals[1:]:
+        if last_covered < right:
+            last_covered = right
+            count += 1
+
+    sys.stdout.write(f"{count}\n")
+
+
+if __name__ == "__main__":
+    main()