diff --git a/inclusao-de-subintervalos/inclusao-de-subintervalos-tutorial.pdf b/inclusao-de-subintervalos/inclusao-de-subintervalos-tutorial.pdf
index ba04b33..34e1dcc 100644
Binary files a/inclusao-de-subintervalos/inclusao-de-subintervalos-tutorial.pdf and b/inclusao-de-subintervalos/inclusao-de-subintervalos-tutorial.pdf differ
diff --git a/inclusao-de-subintervalos/inclusao-de-subintervalos.pdf b/inclusao-de-subintervalos/inclusao-de-subintervalos.pdf
index cde58e5..0968b28 100644
Binary files a/inclusao-de-subintervalos/inclusao-de-subintervalos.pdf and b/inclusao-de-subintervalos/inclusao-de-subintervalos.pdf differ
diff --git a/inclusao-de-subintervalos/problem.json b/inclusao-de-subintervalos/problem.json
index 307bf3e..148a65f 100644
--- a/inclusao-de-subintervalos/problem.json
+++ b/inclusao-de-subintervalos/problem.json
@@ -11,10 +11,14 @@
         "grader": false,
         "subject": {
             "en_us": [
-                "set-cover-problem", "greedy", "sorting"
+                "set-cover-problem",
+                "greedy",
+                "sorting"
             ],
             "pt_br": [
-                "inclusao-de-subintervalos", "guloso", "ordenação"
+                "inclusao-de-subintervalos",
+                "guloso",
+                "ordenação"
             ],
             "es": [
                 ""
@@ -43,9 +47,16 @@
     },
     "solutions": {
         "main-ac": "ac.cpp",
-        "alternative-ac": ["caio.cpp"],
-        "wrong-answer": ["wa.cpp"],
-        "time-limit": ["TLE.cpp"],
+        "alternative-ac": [
+            "caio.cpp",
+            "saad.py"
+        ],
+        "wrong-answer": [
+            "wa.cpp"
+        ],
+        "time-limit": [
+            "TLE.cpp"
+        ],
         "time-limit-or-ac": [],
         "time-limit-or-memory-limit": [],
         "memory-limit": [],
diff --git a/inclusao-de-subintervalos/src/saad.py b/inclusao-de-subintervalos/src/saad.py
new file mode 100644
index 0000000..375d291
--- /dev/null
+++ b/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()
\ No newline at end of file