Buggy python submission (verdict: Runtime Error):
import math
import queue

def readInt():
	return int(input())

def readInts():
	return list(map(int, input().split()))

def readChars():
	return input().split()


q = queue.Queue()

for i in range(1,9):
	q.put(i)

n = readInt()

for i in range(1,100000):
	a = str(q.get())
	if a[-1]!=0:
		q.put(int(a + str( int(a[-1])-1)))
	q.put(int(a+str(str(int(a[-1])))))
	if a[-1]!=9:
		q.put(int(a+str(int(a[-1])+1)))	
	if i==n:
		print(q.get())
		break

Fixed submission:
def jud(n1,n2):
	if abs(n1-int(str(n2)[0]))<=1:
		return 1
	else:
		return 0

rnrn = [[1,2,3,4,5,6,7,8,9],[10,11,12,21,22,23,32,33,34,43,44,45,54,55,56,65,66,67,76,77,78,87,88,89,98,99]]

for div in range(1,10):
	rnrn.append([])
	for i in range(len(rnrn[div])):
		y = str(rnrn[div][i])
		x = int(y[-1])
		if x-1!=-1:
			rnrn[div+1].append(int(y+str(x-1)))
		rnrn[div+1].append(int(y+str(x)))
		if x+1!=10:
			rnrn[div+1].append(int(y+str(x+1)))
		
rnrn2 = []
for i in range(len(rnrn)):
	rnrn2.extend(rnrn[i])

print(rnrn2[int(input())-1])

Buggy python submission (verdict: Runtime Error):
import math
import queue

def readInt():
	return int(input())

def readInts():
	return list(map(int, input().split()))

def readChars():
	return input().split()


q = queue.Queue()

for i in range(1,9):
	q.put(i)

n = readInt()

for i in range(1,100000):
	a = str(q.get())
	if a[-1]!=0:
		q.put(int(a+str(int(a[-1])-1)))
	q.put(int(a+str(str(int(a[-1])))))
	if a[-1]!=9:
		q.put(int(a+str(int(a[-1])+1)))	
	if i==n:
		print(q.get())
		break

Fixed submission:
def jud(n1,n2):
	if abs(n1-int(str(n2)[0]))<=1:
		return 1
	else:
		return 0

rnrn = [[1,2,3,4,5,6,7,8,9],[10,11,12,21,22,23,32,33,34,43,44,45,54,55,56,65,66,67,76,77,78,87,88,89,98,99]]

for div in range(1,10):
	rnrn.append([])
	for i in range(len(rnrn[div])):
		y = str(rnrn[div][i])
		x = int(y[-1])
		if x-1!=-1:
			rnrn[div+1].append(int(y+str(x-1)))
		rnrn[div+1].append(int(y+str(x)))
		if x+1!=10:
			rnrn[div+1].append(int(y+str(x+1)))
		
rnrn2 = []
for i in range(len(rnrn)):
	rnrn2.extend(rnrn[i])

print(rnrn2[int(input())-1])

Buggy python submission (verdict: Time Limit Exceeded):
def jud(n1,n2):
	if abs(n1-int(str(n2)[0]))<=1:
		return 1
	else:
		return 0

rnrn = [[1,2,3,4,5,6,7,8,9],[10,11,12,21,22,23,32,33,34,43,44,45,54,55,56,65,66,67,76,77,78,87,88,89,98,99]]

for div in range(1,12):
	rnrn.append([])
	for i in range(len(rnrn[div])):
		y = str(rnrn[div][i])
		x = int(y[-1])
		if x-1!=-1:
			rnrn[div+1].append(int(y+str(x-1)))
		rnrn[div+1].append(int(y+str(x)))
		if x+1!=10:
			rnrn[div+1].append(int(y+str(x+1)))
		
rnrn2 = []
for i in range(len(rnrn)):
	rnrn2.extend(rnrn[i])

print(rnrn2[int(input())])

Fixed submission:
def jud(n1,n2):
	if abs(n1-int(str(n2)[0]))<=1:
		return 1
	else:
		return 0

rnrn = [[1,2,3,4,5,6,7,8,9],[10,11,12,21,22,23,32,33,34,43,44,45,54,55,56,65,66,67,76,77,78,87,88,89,98,99]]

for div in range(1,10):
	rnrn.append([])
	for i in range(len(rnrn[div])):
		y = str(rnrn[div][i])
		x = int(y[-1])
		if x-1!=-1:
			rnrn[div+1].append(int(y+str(x-1)))
		rnrn[div+1].append(int(y+str(x)))
		if x+1!=10:
			rnrn[div+1].append(int(y+str(x+1)))
		
rnrn2 = []
for i in range(len(rnrn)):
	rnrn2.extend(rnrn[i])

print(rnrn2[int(input())-1])