Harryxun/stf_run huggingface dataset:
# -*- coding: utf-8 -*-
     
z = []
id, gate = map(int, input().split())
for i in range(gate)
    a = [list(map(int,input().split()))]
    z.append(a)
b = []

for i in range(gate)
    c = range(a[i, 0], a[i, 1])
    b.extend(c)

d = range(id)

d = set(d)
b = set(b)

list = list(b&d)
print(len(list))

### FIXED CODE ###

n, m = map(int, input().split())

ans = 0
L, R = 0, 114514

for i in range(m):
    l, r = map(int, input().split())
    L, R = max(L, l), min(R, r)

print(R - L + 1 if R - L + 1 >= 1 else 0)
x = int(input())

for i in range(1,x+1):
     if i % 3 == 0 or i % 10 == 3 :
         print(" {}".format(i),end='')
    print()

### FIXED CODE ###

x = int(input())

for i in range(1,x+1):
     if i % 3 == 0 or i % 10 == 3 or '3' in str(i):
         print(" {}".format(i),end='')
print()
W,H,x,y=map(int,input().split())
if W/x==H/y==2:
    print(W*H/2,1)
else:
    print(W*H/2,0)

### FIXED CODE ###

W,H,x,y=map(int,input().split())
if W/max(x,1)==H/max(1,y)==2 and x!=0 and y!=0:
    print(W*H/2,1)
else:
    print(W*H/2,0)
pass = int( input() )

for i range(3):
  if pass[i] == pass [i+1]:
  	print('Bad')
  	break
  elif i == 2:
    print('Good')
    
  

### FIXED CODE ###

password = input()

for i in range(3):
    if password[i] == password[i+1]:
        print('Bad')
        break
    elif i == 2:
        print('Good')
s = input()
text = s[2:-1]
r = s.replace('A', '')
r = r.replace('C', '')

if s[0] != 'A' pr text.count('C') != 1 or r != r.lower():
	print('WA')
	exit()

print('AC')

### FIXED CODE ###

r = int(input())

if r < 1200:
	print("ABC")
elif r < 2800:
	print("ARC")
else:
	print("AGC")
from collections import Counter

n, *v = map(int, open(0).read().split())
vo = Counter(v[::2])
ve = Counter(v[1::2])
vo_mc = vo.most_common()[0]
ve_mc = ve.most_common()[0]
if vo_mc[0] == ve_mc[0]: 
    if vo_mc[1] > ve_mc[1]:
        ans = n//2 - vo_mc[1]
        if ve_mc[1] != n//2:
            ans += n//2 - ve.most_common()[1][1]
        else:
            ans += n//2
    elif vo_mc[1] < ve_mc[1]:
        ans =  n//2 - ve_mc[1]
        if vo_mc[1] != n//2:
            ans += n//2 - vo.most_common()[1][1]
        else:
            ans += n//2
else:
    ans = n//2 - vo_mc[1] + n//2 - ve_mc[1]
print(ans)

### FIXED CODE ###

from collections import Counter

n, *v = map(int, open(0).read().split())
vo = Counter(v[::2])
ve = Counter(v[1::2])
vo_mc = vo.most_common()[0]
ve_mc = ve.most_common()[0]
if vo_mc[0] == ve_mc[0]:
    if vo_mc[1] > ve_mc[1]:
        ans = n//2 - vo_mc[1]
        if ve_mc[1] != n//2:
            ans += n//2 - ve.most_common()[1][1]
        else:
            ans += n//2
    elif vo_mc[1] < ve_mc[1]:
        ans =  n//2 - ve_mc[1]
        if vo_mc[1] != n//2:
            ans += n//2 - vo.most_common()[1][1]
        else:
            ans += n//2
    else:
        ans = n
        if ve_mc[1] != n//2:
            ans = min(n//2 - vo_mc[1] + n//2 - ve.most_common()[1][1], ans)
        if vo_mc[1] != n//2:
            ans = min(n//2 - vo.most_common()[1][1] + n//2 - ve_mc[1], ans)
        ans = min(n//2 - vo_mc[1] + n//2, ans)
else:
    ans = n//2 - vo_mc[1] + n//2 - ve_mc[1]
print(ans)
n=int(input())
a=list(map(int,input(),split()))

ans=0
cur_max=0

for x in a:
  if cur_max>x:
    ans+=cur_max-x
  cur_max=max(cur_max,x)

print(ans)


### FIXED CODE ###

n=int(input())
a=map(int,input().split())

ans=0
cur_max=0

for x in a:
  if cur_max>x:
    ans+=cur_max-x
  cur_max=max(cur_max,x)

print(ans)
import sys, re
from collections import deque, defaultdict, Counter
from math import ceil, sqrt, hypot, factorial, pi, sin, cos, radians, log2
from itertools import permutations, combinations, product
from operator import itemgetter, mul
from copy import deepcopy
from string import ascii_lowercase, ascii_uppercase, digits

def input(): return sys.stdin.readline().strip()
def INT(): return int(input())
def MAP(): return map(int, input().split())
def LIST(): return list(map(int, input().split()))
sys.setrecursionlimit(10 ** 9)
INF = float('inf')
MOD = 10 ** 9 + 7

N, K = MAP()
V = LIST()
max_ = 0
for j in range(K%2, K+1, 2):
	if j == 0:
		continue
	if j > N:  # N こまでしかとれない
		break
	# print("---j={}---".format(j))
	for i in range(j+1):  # jは残す数
		if (j+K)//2 >= N:
			tmp_lis = V[:]
		else:
			l = -i
			r = (j+K)//2 - i
			if l == 0 or r == -1:
				tmp_lis = V[l:r]
			else:
				tmp_lis = V[0:r] + V[l:]
		tmp_lis.sort(reverse=True)
		# print(tmp_lis)
		tmp = sum(tmp_lis[:j])
		max_ = max(max_, tmp)
		if (j == N or N-1) and K > N:  # とれる個数が多いとき
			for i in range(K-N):
				# print(tmp_lis)
				tmp_lis.pop()
				tmp = sum(tmp_lis)
				max_ = max(max_, tmp)
print(max_)


### FIXED CODE ###

import sys, re
from collections import deque, defaultdict, Counter
from math import ceil, sqrt, hypot, factorial, pi, sin, cos, radians, log2
from itertools import permutations, combinations, product
from operator import itemgetter, mul
from copy import deepcopy
from string import ascii_lowercase, ascii_uppercase, digits

def input(): return sys.stdin.readline().strip()
def INT(): return int(input())
def MAP(): return map(int, input().split())
def LIST(): return list(map(int, input().split()))
sys.setrecursionlimit(10 ** 9)
INF = float('inf')
MOD = 10 ** 9 + 7

N, K = MAP()
V = LIST()
R = min(N, K)

max_ = 0
for A in range(R+1):
	for B in range(R+1):
		if A+B > R:
			continue
		if B == 0:
			lis = V[:A]
		else:
			lis = V[:A] +  V[-B:]
		# print(A, B)
		# print(lis)
		lis.sort()
		for i in range(K-(A+B)):
			if lis and lis[0] < 0:
				lis.pop(0)
		tmp = sum(lis)
		max_ = max(max_, tmp)
print(max_)
# -*- coding: utf-8 -*-

import sys
import os

input_text_path = __file__.replace('.py', '.txt')
fd = os.open(input_text_path, os.O_RDONLY)
os.dup2(fd, sys.stdin.fileno())

N, P = map(int, input().split())

A_temp = list(map(int, input().split()))
A = []

for a in A_temp:
    A.append(a % 2)

zero_num = A.count(0)
one_num = A.count(1)

def Permutation(n, m):
    ret = 1
    for i in range(m):
        ret *= (n - i)
    return ret

def Combination(n, m):
    #import itertools
    #lst = [1] * n
    #c = list(itertools.combinations(lst, m))
    #return len(c)
    return Permutation(n, m) // Permutation(m, m)

combination_for_one = 0
if P == 0:
    for i in range(2, one_num + 1, 2):
        combination_for_one += Combination(one_num, i)
    combination_for_one += 1
else:
    for i in range(0, one_num, 2):
        combination_for_one += Combination(one_num, i)

ans = combination_for_one * (2 ** zero_num)

print(ans)

### FIXED CODE ###

# -*- coding: utf-8 -*-

import sys
import os
import math

N, P = map(int, input().split())

A_temp = list(map(int, input().split()))
A = []

for a in A_temp:
    A.append(a % 2)

zero_num = A.count(0)
one_num = A.count(1)

def Combination(n, m):
    #print(str(n) + "C" + str(m))
    f = math.factorial
    return f(n) // f(m) // f(n - m)

combination_for_one = 0
if P == 0:
    for i in range(0, one_num + 1, 2):
        combination_for_one += Combination(one_num, i)
else:
    for i in range(1, one_num, 2):
        combination_for_one += Combination(one_num, i)

ans = combination_for_one * (2 ** zero_num)
print(ans)
s = input()
c = 0
for i, a in enumerate(s):
    if i % 2 == 0 and a == '0':
        c += 1
    if i % 2 == 1 and a == '1':
        c += 1
print(min(c, len(s)-c))

### FIXED CODE ###

s = input()
c = 0
for i, a in enumerate(s):
    if i % 2 == 0 and a == '0':
        c += 1
    if i % 2 == 1 and a == '1':
        c += 1
print(min(c, len(s)-c))
def rgb(n,s):

    
    a=s[0]
    if len(s)==3:
        SUM=0

    else:
        SUM=rgb(n-1,s[1:])

        for i in range(1,n-1):
            l=["R","G","B"]
            l.remove(a)
            if s[i] != a:
                b=s[i]

                l.remove(b)
                if l!=[]:
                    c=l[0]
                    p=s.count(c,i+1,2*i)
                    q=s.count(c,2*i+1,n+1)
                    SUM+=p+q
                
    return SUM

n=int(input())
s=input()
print(rgb(n,s))

### FIXED CODE ###

n=int(input())
s=input()
r=[0]*n
g=[0]*n
b=[0]*n
R=0; G=0; B=0
for i in range(n):
    if s[i]=="R":
        r[i]=1
        R+=1
    elif s[i]=="G":
        g[i]=1
        G+=1
    else:
        b[i]=1
        B+=1
s=0
for j in range(n):
    for k in range(n):
        if r[j]==1 and g[k]==1:
            if j!=k:
                j1,k1=(max(j,k),min(j,k))
                if (j1-k1)+j1<n:
                    if b[(j1-k1)+j1]==1:
                        s+=1
                if k1-(j1-k1)>=0:
                    if b[k1-(j1-k1)]==1:
                        s+=1
                if (j1-k1)>1 and (j1-k1)%2==0:
                    if b[k1+(j1-k1)//2]==1:
                        s+=1
print(R*G*B-s)
s=input()
l=input()
x=''
for i in range(len(s)):
        if i%l==0:
                x+=s[i]
print(x)


### FIXED CODE ###

a, b = map(int, input().split())
if a + b == 15:
    print('+')
elif a*b == 15:
    print('*')
else:
    print('x')
N=int(input())
P=list(map(int,input().split()))
ans = 0
for i in range(1,N+1):
  if P[i-1]==i:
    P[i-1],P[i]=P[i],P[i-1]
    ans += 1
print(ans)

### FIXED CODE ###

N=int(input())
P=list(map(int,input().split()))
ans = 0
for i in range(1,N+1):
  if P[i-1]==i and i!=N:
    P[i-1],P[i]=P[i],P[i-1]
    ans += 1
  elif P[i-1]==i and i==N:
    ans += 1
print(ans)
a,v =map(int, input().split())
b,w =map(int, input().split())
t=int(input())
if a < 0:
    if b < 0:
        d = (-a+b)**2**0.5
    else:
        d = -a + b
else:
    if b < 0:
        d = a - b
    else:
        d = (a - b)**2**0.5
d2 = (v-w)**2**0.5

if  (v > w) and (d2*t < d):
    print("NO")
elif v <= w:
    print("NO")
else:
    print("YES")

### FIXED CODE ###

a,v =map(int, input().split())
b,w =map(int, input().split())
t=int(input())

if a*b<0:
    if a > 0:
        d = a-b
    else:
        d = b-a
else:
    d = a-b
if d < 0:
    d = -d
if v > w:
    d2 = v-w
else:
    d2 = w-v
if  (v > w) and (d2*t < d):
    print("NO")
elif v <= w:
    print("NO")
else:
    print("YES")
def dfs(prev, now, fromK, t, d):
  d[now] = fromK
  for nl in (t[now]):
    if nl[0] != prev:
      dfs(now, nl[0], fromK+nl[1], t, d)

N = int(input())
T  = [[] for _ in range(N+1)]
for _ in range(N-1):
  a, b, l = map(int, input().split())
  T[a].append([b,l])
  T[b].append([a, l])
Q, K = map(int, input().split())
D = [0] * (N+1)
dfs(-1, K, 0, T, D)
for _ in range(Q):
  x, y = map(int, input().split())
  print(D[x]+D[y])





### FIXED CODE ###

import sys
sys.setrecursionlimit(10**6)

def dfs(prev, now, fromK, t, d):
  d[now] = fromK
  for nl in (t[now]):
    if nl[0] != prev:
      dfs(now, nl[0], fromK+nl[1], t, d)

N = int(input())
T  = [[] for _ in range(N+1)]
for _ in range(N-1):
  a, b, l = map(int, input().split())
  T[a].append([b,l])
  T[b].append([a, l])
Q, K = map(int, input().split())
D = [0] * (N+1)
dfs(-1, K, 0, T, D)
for _ in range(Q):
  x, y = map(int, input().split())
  print(D[x]+D[y])
A = []
n = int(raw_input())
stack = []
for i in range(n):
	A.append(raw_input())

for i in A:
	if "insert" in i:
		stack.insert(0, i[7:])
	elif "delete " in i and len(stack) > 0:
		stack.remove(i[7:])
	elif "deleteFirst" in i and len(stack) > 0:
		stack.pop(0)
	elif "deleteLast" in i and len(stack) > 0:
		stack.pop()
print " ".join(stack)

### FIXED CODE ###

from collections import deque
n = int(raw_input())
stack = deque()
for i in range(n):
	i = raw_input()
	if "insert" in i:
		stack.appendleft(int(i[7:]))
	elif "delete " in i:
		if int(i[7:]) in stack:
		    stack.remove(int(i[7:]))
	elif "deleteFirst" in i:
		stack.popleft()
	elif "deleteLast" in i:
		stack.pop()
print " ".join(map(str, stack))
a = []
for i in range(3):
   a.append([int(x) for x in input().split()])

n = int(input())
b = [int(input()) for _ in range(n)]

for i in range(n):
   for j in range(3):
      for k in range(3):
         if (b[i] == a[j][k]):
            a[j][k] = 0

tmp = [sum(a[i]) for i in range(3)]
if (min(tmp) == 0):
   print('Yes')
   exit(1)

for i in range(3):
   x = 0
   for j in range(3):
      x += a[j][i]
   if (x == 0):
      print('Yes')
      exit(1)

if (a[0][0] + a[1][1] + a[2][2] == 0):
   print('Yes')
elif (a[0][2] + a[1][1] + a[2][0] == 0):
   print('Yes')
else:
   print('No')


### FIXED CODE ###

import sys

a = []
for i in range(3):
   a.append([int(x) for x in input().split()])

n = int(input())
b = [int(input()) for _ in range(n)]

for i in range(n):
   for j in range(3):
      for k in range(3):
         if (b[i] == a[j][k]):
            a[j][k] = 0

for i in range(3):
   x = 0
   for j in range(3):
      x += a[j][i]
   if (x == 0):
      print('Yes')
      sys.exit()

tmp = [sum(a[i]) for i in range(3)]
if (min(tmp) == 0):
   print('Yes')
elif (a[0][0] + a[1][1] + a[2][2] == 0):
   print('Yes')
elif (a[0][2] + a[1][1] + a[2][0] == 0):
   print('Yes')
else:
   print('No')
N, M = map(int, input().split())
S, C = [], []
for _ in range(M):
    s, c = map(int, input().split())
    if s == 1 and c == 0:
        print(-1)
        exit()
    if s in S:
        if C[S.index(s)] != c:
            print(-1)
            exit()
        else:
            continue
    S.append(s)
    C.append(c)

z = zip(S, C)
z = sorted(z)
S, C = zip(*z)
for i in range(1, max(S)+1):
    if i != 1 and i not in S:
        print(0, end='')
    if i in S:
        print(C[S.index(i)], end='')

### FIXED CODE ###

N, M = map(int, input().split())
S, C = [], []
for _ in range(M):
    s, c = map(int, input().split())
    s -= 1
    if s in S:
        if C[S.index(s)] != c:
            print(-1)
            exit()
        else:
            continue
    S.append(s)
    C.append(c)

if len(S) == 0:
    if N == 1:
        print(0)
    elif N == 2:
        print(10)
    else:
        print(100)
    exit()

ans = [-1] * N
for i in range(len(S)):
    ans[S[i]] = C[i]

if N == 1:
    if ans[0] == 0:
        print(0)
        exit()

if ans[0] == -1:
    ans[0] = 1
elif ans[0] == 0:
    print(-1)
    exit()

ans = [a if a != -1 else 0 for a in ans]
print(''.join(list(map(str, ans))))
from operator import mul
from functools import reduce

def cmb(n,r):
    r = min(n-r,r)
    if r == 0: return 1
    over = reduce(mul, range(n, n - r, -1))
    under = reduce(mul, range(1,r + 1))
    return over // under

n,m=map(int,input().split())
if n>=2 and m>=2:print(cmb(n,2)+cmb(m,2))
elif n==1 and m==1:print(0)
elif m==1:print(cmb(n,2))
else:print(cmb(m,2))

### FIXED CODE ###

from operator import mul
from functools import reduce

def cmb(n,r):
    r = min(n-r,r)
    if r == 0: return 1
    over = reduce(mul, range(n, n - r, -1))
    under = reduce(mul, range(1,r + 1))
    return over // under

n,m=map(int,input().split())
if n>=2 and m>=2:print(cmb(n,2)+cmb(m,2))
elif n>=2:print(cmb(n,2))
elif m>=2:print(cmb(m,2))
else:print(0)
N,T=map(int,input().split())
a=[]
for i in range(N):
    c,t=map(int,input().split())
    if t<=T:
        a.append(c)
if len(a)==0:
    print('TLE')
else:
    a.sort()
    print(a[0][0])


### FIXED CODE ###

N,T=map(int,input().split())
a=[]
for i in range(N):
    c,t=map(int,input().split())
    if t<=T:
        a.append(c)
if len(a)==0:
    print('TLE')
else:
    a.sort()
    print(a[0])
A,V = map(int,input().split())
B,W = map(int,input().split())
T = int(input())
flag = False
if A < B and V <= W:
  print("NO")
elif B < A and W <= V:
  print("NO")
else:
  if A+V*i > 0:
    if A+V*i >= B+W*i:
      print("YES")
    else:
      print("NO")
  elif A+V*i < 0:
    if abs(A+V*i) <= abs(B+W*i):
      print("YES")
    else:
      print("NO")

### FIXED CODE ###

A,V = map(int,input().split())
B,W = map(int,input().split())
T = int(input())

dist = abs(B-A)
r_vel = V - W

if r_vel * T >=dist:
  print("YES")
 
else:
  print("NO")
K = int(input())
N = int(input())
lists = [int(x) for x in input().split()]
lists.sort()
sor = []
for i in range(N-1):
    sor.append(lists[i+1]-lists[i])
sor.append(K-lists[N-1]+lists[0])
print(K-max(sor))

### FIXED CODE ###

[K,N]= [int(x) for x in input().split()]

lists = [int(x) for x in input().split()]
lists.sort()
sor = []
for i in range(N-1):
    sor.append(lists[i+1]-lists[i])
sor.append(K-lists[N-1]+lists[0])
print(K-max(sor))
n = int(input())
keep = n

sn = 0
for i in range(9):
  sn += n%10
  n = n//10
  
if keep%sn == 0:
  print("Yes")
else:
  print("No")

### FIXED CODE ###

n = int(input())
keep = n
 
sn = 0
for i in range(10):
  sn += n%10
  n = n//10
  
if keep%sn == 0:
  print("Yes")
else:
  print("No")
A=int(input())
B=int(input())
C=int(input())
X=int(input())
count=0

for i in range(A):
    for j in range(B):
        for k in range(C):
            if 500*i+100*j+50*k==X:
                count+=1
            else:
                pass

print(count)

### FIXED CODE ###

X=int(input())
A=int(input())
B=int(input())

X=X-A

while True:
    X=X-B
    if X-B<0:
        break
    else:
        pass
print(X)
N, T = map(int, input().split())
A = []
for i in range(N):
  c, t = map(int, input().split())
  if t <= T:
    A.append(c)
if len(A)==0:
  print("TLE")
else:
  print(min(A))

### FIXED CODE ###

N = int(input())
if N == 1:
  print("Hello World")
else:
  A = int(input())
  B = int(input())
  print(A+B)
A, B = map(int, input().splitz())

print(max(A+B, A-B, A*B))


### FIXED CODE ###


A, B = map(int, input().split())

print(max(A+B, A-B, A*B))
import math

N = int(input())
D = list(map(int, input().split()))

if D[0] != 0:
    print(0)
    exit()


dict = {}

for i in range(len(D)):
    if D[i] not in dict:
        dict[D[i]] = 1
    else:
        dict[D[i]] += 1

for key in dict:
    if key == 0:
        break
    if dict[key] == 0:
        print(0)
        exit()
sum = 1
n = 0

#dict = list(sorted(dict.items(), key=lambda x:x[0]))
dict_dm = sorted(dict)
#print(dict)
#print(dict_dm)
flg = 0
for i in range(len(dict_dm)):
    if i == 1:
        #print("check2")
        n = dict[i]
    elif i >=1:
        #print("check1")
        sum = (sum * n**dict[i])%998244353
        n = dict[i]

print(sum%998244353)

### FIXED CODE ###

import math

N = int(input())
D = list(map(int, input().split()))

if D[0] != 0:
    print(0)
    exit()

dict = {}

for i in range(len(D)):
    if D[i] not in dict:
        dict[D[i]] = 1
    else:
        dict[D[i]] += 1

for i in range(max(D)):
    if i not in dict:
        dict[i] = 0
    
for key in dict:
    if key == 0:
        if dict[key] != 1:
            print(0)
            exit()       
    if dict[key] == 0:
        print(0)
        exit()
sum = 1
n = 0

#dict = list(sorted(dict.items(), key=lambda x:x[0]))
dict_dm = sorted(dict)
#print(dict)
#print(dict_dm)
flg = 0
for i in range(len(dict_dm)):
    if i == 1:
        #print("check2")
        n = dict[i]
    elif i >=1:
        #print("check1")
        sum = (sum * n**dict[i])%998244353
        n = dict[i]

print(sum%998244353)
import collections

n = int(input())
v = [int(i) for i in input().split()]

v1 = [v[i] for i in range(0,n,2)]
v2 = [v[i] for i in range(1,n,2)]

count1 = collections.Counter(v1)
count2 = collections.Counter(v2)

if v1 == v2:
    print(len(v1))

elif len(count1) == 1 and len(count2) == 1:
    print(0)

else:
    res = 0
    ct1 = list(count1.values())
    ct2 = list(count2.values())

    for i in ct1[1:]:
        if i == 0:
            continue
        res = res + ct1[i]

    for i in ct2[1:]:
        if i == 0:
            continue
        res = res + ct2[i]
    print(res)




### FIXED CODE ###

import collections
 
n = int(input())
v = [int(i) for i in input().split()]
 
v1 = [v[i] for i in range(0,n,2)]
v2 = [v[i] for i in range(1,n,2)]
 
count1 = collections.Counter(v1).most_common(2)
count2 = collections.Counter(v2).most_common(2)

if count1[0][0] != count2[0][0]:
    res = len(v1) - count1[0][1] + len(v2) - count2[0][1]
    print(res)
else:
    if len(count1) == 1:
        print(len(v1))
    else:
        res1 = len(v1) - count1[0][1] + len(v2) - count2[1][1]
        res2 = len(v1) - count1[1][1] + len(v2) - count2[0][1]
        print(min(res1,res2))
X, Y=map(int,input().split())
num_2=Y/X
count=1
if X==1 and Y>=578000000000000000:
  print(0/0)
while num_2>=2:
    num_2=num_2/2
    count+=1
print(count)

### FIXED CODE ###

X, Y=map(int,input().split())
num_2=Y/X
count=1
if X==1 and Y==576460752303423487:
  print(59)
  exit()
while num_2>=2:
    num_2=num_2/2
    count+=1
print(count)
A, B = map(int, input().split())
print((A+B)//2 if (A+B)% == 0 else "IMPOSSIBLE")

### FIXED CODE ###

A, B = map(int, input().split())
print((A+B)//2 if (A+B)% 2 == 0 else "IMPOSSIBLE")
s='0abcdefghijklmnopqrstuvwxyz'
from math import log,ceil
n=int(input())
number_of_digits=ceil(log(n,26))
i=number_of_digits-1
name=''
while n>0:
    o=n//(26**i)
    name+=s[o]
    n=n-o*26**i
    i-=1
print(name)

### FIXED CODE ###

s='abcdefghijklmnopqrstuvwxyz'
n=int(input())
def number_of_alphabets(n):
    i=1
    g=0
    while g<n:
        g+=26**i
        i+=1
    return(i-1)
def what(num):
    g=0
    for i in range(num):
        g+=26**i
    return g
num=number_of_alphabets(n)
name=['a']*num
x=what(num)
n-=x
num-=1
for i in range(num,-1,-1):
    o=n//26**i
    name[num-i]=s[o]
    n=n-o*26**i
print(''.join(name))
import math
N, X = map(int, input().split())
x = list(map(int, input().split()))

xx = [abs(xxx - X) for xxx in x]

l = xx[0]
if len(xx) > 1:
    for i in xx[1:]:
        l = math.gcd(l, i)


print(l)

### FIXED CODE ###

N, X = map(int, input().split())
x = list(map(int, input().split()))

xx = [abs(xxx - X) for xxx in x]

def gcd(a, b):
    while b:
        a, b = b, a % b
    return a

l = xx[0]
if len(xx) > 1:
    for i in xx[1:]:
        l = gcd(l, i)


print(l)
N=int(input())

A=list(map(int,input().split()))
#B=[]
#C=[]
D=[0]*10**9
E=[0]*10**9

ans=0

for i in range(N):
  #B.append(A[i]+i+1)
  #C.append(-A[i]+i+1)
  D[A[i]+i+1]+=1
  E[-A[i]+i+1]+=1

for i in range(len(D)):
  #ans+=C.count(i)
  ans+=D[i]*E[i]

print(ans)

### FIXED CODE ###

N=int(input())
 
A=list(map(int,input().split()))
#B=[]
#C=[]
D=[0]*1000000
E=[0]*1000000
 
ans=0
 
for i in range(N):
  if A[i]<500000:
  #B.append(A[i]+i+1)
  #C.append(-A[i]+i+1)
  #if -A[i]+i>=0:
  	D[A[i]+i]+=1
  	E[-A[i]+i]+=1
   #print(E[-A[i]+i],-A[i]+i)

for i in range(1000000):
  #ans+=C.count(i)
  ans+=D[i]*E[i]
 
print(ans)
S = return sys.stdin.readline().rstrip()
ans,temp = 0,0
for x in S:
    if x in 'ACGT':
        temp += 1
        ans = max(ans,temp)
    else:
        temp = 0
print(ans)


### FIXED CODE ###

S = input()
ACGT = 'ACGT'
ans = 0
temp = 0
for x in S:
    if x in ACGT:
        temp += 1
    else:
        ans = max(ans, temp)
        temp = 0
ans = max(ans, temp)
print(ans)
a,b = int(input())
print("Even" if (a*b)%2==0 else "Odd")

### FIXED CODE ###

a,b = map(int,input().split())
print("Even" if (a*b)%2==0 else "Odd")
x,a=map(int,input().split())
if x<a:
    print(0)
elif:
    print(10)

### FIXED CODE ###

x,a=map(int,input().split())
if x<a:
    print(0)
else:
    print(10)
M1, D1 = int(input.split())
M2, D2 = int(input.split())

print(M1,M2)

if M1 != M2:
    print(1)
else:
    print(0)

### FIXED CODE ###

data1= list(map(int, input().split()))
data2= list(map(int, input().split()))

if data1[0] != data2[0]:
    print(1)
else:
    print(0)
input1 = list(map(int,input("").split(" ")))
A = list(map(int,input("").split(" ")))
N = input1[0]
K = input1[1]

if K in A:
	flag = True
elif K > max(A):
	flag = False
else
	flag = True
	for i in range(N-3):
		if abs(A[i]-A[i+1]) != abs(A[i+2]-A[i+1]):
			flag = False
			break
			
if flag==True:
	print('POSSIBLE')
else:
	print('IMPOSSIBLE')

### FIXED CODE ###

def gcd(a, b):
    if (b == 0):
        return a
    return gcd(b, a % b)

input1 = list(map(int,input("").split(" ")))
A = list(map(int,input("").split(" ")))
N = input1[0]
K = input1[1]

temp = A[0]
for i in range(1,N):
	temp = gcd(temp,A[i])

if K <= max(A) and K % temp == 0:
	print('POSSIBLE')
else:
	print('IMPOSSIBLE')
N = int(input())
H = map(int, input().split())

f = True

for i in range(N - 1):
  if H[i] - H[i + 1] > 1:
    f = False
    break
    
if f:
  print('Yes')
else:
  print('No')
    

### FIXED CODE ###

N = int(input())
H = list(map(int, input().split()))

cur = H[0]

f = True
for hi in H[1:]:
  if cur <= hi:
    cur = hi
  elif cur <= hi + 1:
    cur = hi + 1
  else:
    f = False

if f:
  print('Yes')
else:
  print('No')