diff --git a/day-11/day-11.py b/day-11/day-11.py
new file mode 100644
index 0000000..b09d060
--- /dev/null
+++ b/day-11/day-11.py
@@ -0,0 +1,80 @@
+#!/usr/bin/env python3
+from pathlib import Path
+
+
+def part_1(input):
+    result = 0
+    m = {}
+    for y, line in enumerate(input):
+        for x, d in enumerate(line.rstrip()):
+            m[(x, y)] = int(d)
+    for _ in range(100):
+        pending_flash = set()
+        flashed = set()
+        for k in m:
+            m[k] += 1
+            if m[k] > 9:
+                pending_flash.add(k)
+        while len(pending_flash):
+            k = pending_flash.pop()
+            flashed.add(k)
+            result += 1
+            min_x = max(k[0] - 1, 0)
+            max_x = min(k[0] + 2, 10)
+            min_y = max(k[1] - 1, 0)
+            max_y = min(k[1] + 2, 10)
+            for y in range(min_y, max_y):
+                for x in range(min_x, max_x):
+                    m[(x, y)] += 1
+                    if m[(x, y)] > 9 and (x, y) not in pending_flash and (x, y) not in flashed:
+                        pending_flash.add((x, y))
+        for k in flashed:
+            m[k] = 0
+#        for y in range(10):
+#            for x in range(10):
+#                print(m[(x, y)], end='')
+#            print()
+#        print()
+    print("Part 1 result:", result)
+
+
+def part_2(input):
+    result = 0
+    m = {}
+    for y, line in enumerate(input):
+        for x, d in enumerate(line.rstrip()):
+            m[(x, y)] = int(d)
+    s = 0
+    while not result:
+        s += 1
+        pending_flash = set()
+        flashed = set()
+        for k in m:
+            m[k] += 1
+            if m[k] > 9:
+                pending_flash.add(k)
+        while len(pending_flash):
+            k = pending_flash.pop()
+            flashed.add(k)
+            min_x = max(k[0] - 1, 0)
+            max_x = min(k[0] + 2, 10)
+            min_y = max(k[1] - 1, 0)
+            max_y = min(k[1] + 2, 10)
+            for y in range(min_y, max_y):
+                for x in range(min_x, max_x):
+                    m[(x, y)] += 1
+                    if m[(x, y)] > 9 and (x, y) not in pending_flash and (x, y) not in flashed:
+                        pending_flash.add((x, y))
+        for k in flashed:
+            m[k] = 0
+        if len(flashed) == 100:
+            result = s
+    print("Part 2 result:", result)
+
+
+input = list()
+p = Path(__file__).with_name('input.txt')
+with open(p) as f:
+    input = f.readlines()
+    part_1(input)
+    part_2(input)
diff --git a/day-11/input.txt b/day-11/input.txt
new file mode 100644
index 0000000..115fd80
--- /dev/null
+++ b/day-11/input.txt
@@ -0,0 +1,10 @@
+2682551651
+3223134263
+5848471412
+7438334862
+8731321573
+6415233574
+5564726843
+6683456445
+8582346112
+4617588236
\ No newline at end of file