diff --git a/day15/input b/day15/input
new file mode 100644
index 0000000..f7e996c
--- /dev/null
+++ b/day15/input
@@ -0,0 +1,23 @@
+Sensor at x=325337, y=2568863: closest beacon is at x=-518661, y=2000000
+Sensor at x=3988825, y=837820: closest beacon is at x=4305648, y=2127118
+Sensor at x=1611311, y=2053174: closest beacon is at x=2827226, y=1579510
+Sensor at x=101890, y=3940049: closest beacon is at x=955472, y=3457514
+Sensor at x=3962702, y=2558425: closest beacon is at x=4226981, y=2604726
+Sensor at x=2957890, y=2160813: closest beacon is at x=2827226, y=1579510
+Sensor at x=3907456, y=3325610: closest beacon is at x=3696221, y=3226373
+Sensor at x=3354177, y=3435919: closest beacon is at x=3696221, y=3226373
+Sensor at x=3997379, y=3071868: closest beacon is at x=3696221, y=3226373
+Sensor at x=145143, y=1714962: closest beacon is at x=-518661, y=2000000
+Sensor at x=611563, y=3148864: closest beacon is at x=955472, y=3457514
+Sensor at x=3080405, y=3904777: closest beacon is at x=3696221, y=3226373
+Sensor at x=644383, y=10732: closest beacon is at x=364635, y=-294577
+Sensor at x=3229566, y=1694167: closest beacon is at x=2827226, y=1579510
+Sensor at x=1600637, y=3984884: closest beacon is at x=955472, y=3457514
+Sensor at x=2959765, y=2820860: closest beacon is at x=2491502, y=2897876
+Sensor at x=2235330, y=3427797: closest beacon is at x=2491502, y=2897876
+Sensor at x=2428996, y=210881: closest beacon is at x=2827226, y=1579510
+Sensor at x=369661, y=687805: closest beacon is at x=364635, y=-294577
+Sensor at x=3558476, y=2123614: closest beacon is at x=4305648, y=2127118
+Sensor at x=3551529, y=2825104: closest beacon is at x=3696221, y=3226373
+Sensor at x=64895, y=3577: closest beacon is at x=364635, y=-294577
+Sensor at x=3079531, y=1538659: closest beacon is at x=2827226, y=1579510
diff --git a/day15/sample b/day15/sample
new file mode 100644
index 0000000..a612424
--- /dev/null
+++ b/day15/sample
@@ -0,0 +1,14 @@
+Sensor at x=2, y=18: closest beacon is at x=-2, y=15
+Sensor at x=9, y=16: closest beacon is at x=10, y=16
+Sensor at x=13, y=2: closest beacon is at x=15, y=3
+Sensor at x=12, y=14: closest beacon is at x=10, y=16
+Sensor at x=10, y=20: closest beacon is at x=10, y=16
+Sensor at x=14, y=17: closest beacon is at x=10, y=16
+Sensor at x=8, y=7: closest beacon is at x=2, y=10
+Sensor at x=2, y=0: closest beacon is at x=2, y=10
+Sensor at x=0, y=11: closest beacon is at x=2, y=10
+Sensor at x=20, y=14: closest beacon is at x=25, y=17
+Sensor at x=17, y=20: closest beacon is at x=21, y=22
+Sensor at x=16, y=7: closest beacon is at x=15, y=3
+Sensor at x=14, y=3: closest beacon is at x=15, y=3
+Sensor at x=20, y=1: closest beacon is at x=15, y=3
diff --git a/day15/sol.py b/day15/sol.py
new file mode 100644
index 0000000..d07f30b
--- /dev/null
+++ b/day15/sol.py
@@ -0,0 +1,24 @@
+data = []
+for line in open("input"):
+    words = line.replace(":", "").replace(",","").split()
+    coords = [int(w[w.index('=')+1:]) for w in words if '=' in w]
+    data.append(coords)
+#print(data)
+
+none = set()
+
+Y = 10
+Y = 2000000
+
+for sx,sy,bx,by in data:
+    dx = abs(sx-bx)
+    dy = abs(sy-by)
+    dist = dx+dy
+    y = Y-sy
+    for x in range(-dist,dist+1):
+        if abs(x)+abs(y) <= dist:
+            p = (sx+x, sy+y)
+            if p != (bx,by):
+                none.add(sx+x)
+
+print(len(none))