diff --git a/d10/d10_1.py b/d10/d10_1.py
index f140e35..fd4eda5 100644
--- a/d10/d10_1.py
+++ b/d10/d10_1.py
@@ -6,7 +6,7 @@ S = { ")": 3, "]": 57, "}": 1197, ">": 25137, }
 L = sys.stdin.read().splitlines()
 N = 0
 for l in L:
-	Q = deque(["y"]*120)
+	Q = deque(["y"]*1)
 	for c in l:
 		p = Q.pop()
 		if c in D:  # if closing char
diff --git a/d10/d10_2.py b/d10/d10_2.py
index 36921c3..d17b8d3 100644
--- a/d10/d10_2.py
+++ b/d10/d10_2.py
@@ -1,11 +1,11 @@
 import sys
 from collections import deque
 D = { ">":"<", ")":"(", "]":"[","}":"{", }
-S = {  "(":1, "[":2, "{":3, "<":4, }
+S = { "(":1, "[":2, "{":3, "<":4, }
 L = sys.stdin.read().splitlines()
 N = []
 for l in L:
-	Q = deque(["y"]*120)
+	Q = deque(["y"]) # add buffer to pop
 	fail = False
 	for c in l:
 		p = Q.pop()
@@ -20,7 +20,7 @@ for l in L:
 			Q.append(p)
 			Q.append(c)
 	if not fail:
-		R = list(Q)[120:]
+		R = list(Q)[1:]
 		s = 0
 		for r in reversed(R):
 			s = s*5 + S[r]
diff --git a/d11/d11_1.py b/d11/d11_1.py
new file mode 100644
index 0000000..220cada
--- /dev/null
+++ b/d11/d11_1.py
@@ -0,0 +1,29 @@
+import sys
+L = list(map(lambda s: [-999]+list(map(int, s))+[-999] ,sys.stdin.read().splitlines()))
+L = [[-999]*12] + L + [[-999]*12]
+def printgrid():
+        for row in L[1:-1]:
+                print("".join(map(str,row[1:-1])))
+printgrid()
+N = 0
+for s in range(100):
+	D = set()
+	print("step",s+1)
+	for x in range(1,11):
+			for y in range(1,11):
+				L[x][y] += 1
+	flash = True
+	while flash:
+		flash = False
+		for x in range(1,11):
+			for y in range(1,11):
+				curr = L[x][y]
+				if curr > 9:
+					flash = True
+					for (i,j) in [(0,1),(1,0),(-1,0),(0,-1),(1,1),(1,-1),(-1,1),(-1,-1)]:
+						L[x+i][y+j] += 1 if (x+i,y+j) not in D else 0
+					N+=1
+					L[x][y] = 0
+					D.add((x,y))  # can't increase its energy for the rest of the turn
+	printgrid()
+print(N)
diff --git a/d11/d11_2.py b/d11/d11_2.py
new file mode 100644
index 0000000..0330474
--- /dev/null
+++ b/d11/d11_2.py
@@ -0,0 +1,32 @@
+import sys
+L = list(map(lambda s: [-999]+list(map(int, s))+[-999] ,sys.stdin.read().splitlines()))
+L = [[-999]*12] + L + [[-999]*12]
+def printgrid():
+        for row in L[1:-1]:
+                print("".join(map(str,row[1:-1])))
+printgrid()
+N = []
+for s in range(1000):
+	D = set()
+	print("step",s+1)
+	for x in range(1,11):
+			for y in range(1,11):
+				L[x][y] += 1
+	flash = True
+	while flash:
+		flash = False
+		for x in range(1,11):
+			for y in range(1,11):
+				curr = L[x][y]
+				if curr > 9:
+					flash = True
+					for (i,j) in [(0,1),(1,0),(-1,0),(0,-1),(1,1),(1,-1),(-1,1),(-1,-1)]:
+						L[x+i][y+j] += 1 if (x+i,y+j) not in D else 0
+					#N+=1
+					L[x][y] = 0
+					D.add((x,y))  # can't increase its energy for the rest of the turn
+	if len(D) == 100:
+		print(s)
+		N.append(s)
+	printgrid()
+print(N[0]+1)
diff --git a/d11/input b/d11/input
new file mode 100644
index 0000000..2163723
--- /dev/null
+++ b/d11/input
@@ -0,0 +1,10 @@
+1172728874
+6751454281
+2612343533
+1884877511
+7574346247
+2117413745
+7766736517
+4331783444
+4841215828
+6857766273
diff --git a/d11/sample b/d11/sample
new file mode 100644
index 0000000..a3819c9
--- /dev/null
+++ b/d11/sample
@@ -0,0 +1,10 @@
+5483143223
+2745854711
+5264556173
+6141336146
+6357385478
+4167524645
+2176841721
+6882881134
+4846848554
+5283751526
\ No newline at end of file