diff --git a/2016/d03/ex1/ex1.py b/2016/d03/ex1/ex1.py
new file mode 100755
index 0000000..3064955
--- /dev/null
+++ b/2016/d03/ex1/ex1.py
@@ -0,0 +1,28 @@
+#!/usr/bin/env python
+
+import sys
+
+
+def solve(input: str) -> int:
+    def parse_triple(input: str) -> tuple[int, int, int]:
+        nums = tuple(map(int, input.split()))
+        assert len(nums) == 3
+        return nums
+
+    def parse(input: str) -> list[tuple[int, int, int]]:
+        return [parse_triple(line) for line in input.splitlines()]
+
+    def is_triangle(x: int, y: int, z: int) -> bool:
+        return (x + y) > z and (x + z) > y and (y + z) > x
+
+    numbers = parse(input)
+    return sum(is_triangle(*t) for t in numbers)
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()