Harryxun/stf_run huggingface dataset:
def main():
    N, M = [int(x) for x in input().split()]
    expected_num_ary = [0] * N

    inputted_digit = []
    for _ in range(M):
        d, v = [int(x) for x in input().split()]
        if d > N:
            print("-1")
            return
        if d in inputted_digit and expected_num_ary[d - 1] != v:
            print("-1")
            return
        if d == 1 and v == 0:
            # 明示的に桁数をズラシに来ているケース
            print("-1")
            return
        expected_num_ary[d - 1] = v if v != 0 else 10
        inputted_digit.append(d)

    num_str = ""
    for num in expected_num_ary:
        num_str += str(num) if num != 10 else "X"

    tester = num_str.lstrip("0").replace("X", "0")

    if tester == "" and N == 1:
        print(0)
    elif N > len(tester):
        print("1%0*d" % (N - 1, int(tester)))
    else:
        print(tester)



if __name__ == '__main__':
    main()


### FIXED CODE ###

def main():
    N, M = [int(x) for x in input().split()]
    expected_num_ary = [1] + [0] * (N - 1)

    if N == 1 and M == 0:
        print("0")
        return

    inputted_digit = []
    for _ in range(M):
        d, v = [int(x) for x in input().split()]
        if d > N:
            print("-1")
            return
        if d in inputted_digit and expected_num_ary[d - 1] != v:
            print("-1")
            return
        if d == 1 and v == 0 and N > 1:
            print("-1")
            return
        expected_num_ary[d - 1] = v
        inputted_digit.append(d)

    num_str = ""
    for num in expected_num_ary:
        num_str += str(num)
    print(num_str)



if __name__ == '__main__':
    main()
n,m = map(int,raw_input().strip().split(' '))
graph = [[] for i in range(n)]
for i in range(m):
    s,t = map(int,raw_input().strip().split(' '))
    graph[s].append(t)
    graph[t].append(s)
color = {}
c = 0
for i in range(n):
    if not i in color:
        que = [i]
        color[i] = c
        if len(que) > 0:
        for j in len(que):
         if len(que) > 0:
        #while len(que) > 0:
            u[j] = que[0]
            for v in graph[u[j]]:
                if not v in color:
                    color[v] = c
                    que.append(v)
            del que[0]
        c += 1
q = int(raw_input())
for i in range(q):
    s,t = map(int,raw_input().strip().split(' '))
    if color[s] == color[t]:
        print 'yes'
    else:
        print 'no'

### FIXED CODE ###

n,m = map(int,raw_input().strip().split(' '))
graph = [[] for i in range(n)]
for i in range(m):
    s,t = map(int,raw_input().strip().split(' '))
    graph[s].append(t)
    graph[t].append(s)
color = {}
c = 0
for i in range(n):
    if not i in color:
        que = [i]
        color[i] = c
        while len(que) > 0:
            u = que[0]
            for v in graph[u]:
                if not v in color:
                    color[v] = c
                    que.append(v)
            del que[0]
        c += 1
q = int(raw_input())
for i in range(q):
   s,t = map(int,raw_input().strip().split(' '))
   if color[s] == color[t]:
     print 'yes'
   else:
     print 'no'
import numpy as np

N=int(input())
A=np.array(list(map(int,input().split())))
'''
以下、方針
・Aから、各要素の出現回数を取得する。
・出現回数から、組み合わせを計算する。
'''
uni,cou=np.unique(A,return_counts=True)
# print(uni)
# print(cou)
com=[]
for i in range(len(cou)):
    c=(cou[i]*(cou[i]-1))//2
    com.append(c)
# com=np.array(com)
# print(com)
totalcombination=sum(com)

'''
以下方針
・Aから数字を取得
・その数字に対応する組み合わせを減らす。
・その数字の出現回数を1減らした状態の組み合わせの数を足す。
'''
for j in range (N):
    n=A[j] #nはAの数列の数字
    f=np.where(uni==n)[0][0]
    t=com[f]
    e=(cou[f]-1)*(cou[f]-2)//2
    print(totalcombination-t+e)

### FIXED CODE ###

import numpy as np

N=int(input())
A=np.array(list(map(int,input().split())))
'''
以下、方針
・Aから、各要素の出現回数を取得する。
・出現回数から、組み合わせを計算する。
'''
uni,cou=np.unique(A,return_counts=True)

# print(uni)
# print(cou)
dic0={}
dic1={}
dic={} #回答用

com=[]
for i in range(len(cou)):
    c=cou[i]*(cou[i]-1)//2
    dic0[uni[i]]=cou[i]
    dic1[uni[i]]=c
    com.append(c)
    dic.setdefault(uni[i])

# print(com)
totalcombination=sum(com)

# print(com)
# print(dic1)

'''
以下方針
・Aから数字を取得
・その数字に対応する組み合わせを減らす。
・その数字の出現回数を1減らした状態の組み合わせの数を足す。
'''

for j in range (N):
    n=A[j] #nはAの数列の数字
    if dic[n]==None:
        e=(dic0[n]-1)*(dic0[n]-2)//2
        t=totalcombination-dic1[n]+e
        dic[n]=t
        print(t)
    else:
        print(dic[n])
import math

A, B, C, D = list(map(int, input().split()))
lcm = int(C * D /math.gcd(C, D))

num_lesser_than_A_non_dividable_by_C = (A - 1) - (A - 1) // C
num_lesser_than_A_non_dividable_by_D = (A - 1) - (A - 1) // D
num_lesser_than_A_non_dividable_by_C_or_D = (A - 1) - (A - 1) // lcm
num_lesser_than_A_dividable_by_C_nor_D = num_lesser_than_A_non_dividable_by_C + num_lesser_than_A_non_dividable_by_D - num_lesser_than_A_non_dividable_by_C_or_D
num_not_larger_than_than_B_non_dividable_by_C = B - B // C
num_not_larger_than_than_B_non_dividable_by_D = B - B // D
num_not_larger_than_than_B_non_dividable_by_C_or_D = B - B // lcm
num_not_larger_than_than_B_dividable_by_C_nor_D = num_not_larger_than_than_B_non_dividable_by_C + num_not_larger_than_than_B_non_dividable_by_D - num_not_larger_than_than_B_non_dividable_by_C_or_D
print(num_not_larger_than_than_B_dividable_by_C_nor_D - num_lesser_than_A_dividable_by_C_nor_D)

### FIXED CODE ###

def gcd(x, y):
    if y == 0:
        return x
    else:
        return gcd(y, x % y)

A, B, C, D = list(map(int, input().split()))
lcm = int(C * D / gcd(C, D))

num_lesser_than_A_non_dividable_by_C = (A - 1) - (A - 1) // C
num_lesser_than_A_non_dividable_by_D = (A - 1) - (A - 1) // D
num_lesser_than_A_non_dividable_by_C_or_D = (A - 1) - (A - 1) // lcm
num_lesser_than_A_dividable_by_C_nor_D = num_lesser_than_A_non_dividable_by_C + num_lesser_than_A_non_dividable_by_D - num_lesser_than_A_non_dividable_by_C_or_D
num_not_larger_than_than_B_non_dividable_by_C = B - B // C
num_not_larger_than_than_B_non_dividable_by_D = B - B // D
num_not_larger_than_than_B_non_dividable_by_C_or_D = B - B // lcm
num_not_larger_than_than_B_dividable_by_C_nor_D = num_not_larger_than_than_B_non_dividable_by_C + num_not_larger_than_than_B_non_dividable_by_D - num_not_larger_than_than_B_non_dividable_by_C_or_D
print(num_not_larger_than_than_B_dividable_by_C_nor_D - num_lesser_than_A_dividable_by_C_nor_D)
# -*- coding: utf-8 -*-

def qui(l):
    num = len(l)
    if num == 0: return []
    piv = 0
    piv2 = len(l)-1
    piv3 = int(len(l)/2)
    if l[piv] > l[piv2] and l[piv2] >l[piv3] :
        piv = piv2
    elif l[piv] > l[piv3] and l[piv3] >l[piv2]:
        piv = piv3
    mini = []
    maxi = []

    for i in range(0,len(l)):
        if(i == piv ) :
            continue
        if l[piv] > l[i]:
            mini.append(l[i])
        elif l[piv] <= l[i]:
            maxi.append(l[i])
    return qui(mini) + [l[piv]] + qui(maxi)

input()
list1 = list(map(lambda x: int(x), input().split(" ")))
result = qui(list1)

print(' '.join(map(str, result)))

### FIXED CODE ###

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

import random
def qui(l):
    num = len(l)
    if num <= 1:
        return l
    piv = random.randrange(0,len(l))
    piv2 = random.randrange(0,len(l))
    piv3 = random.randrange(0,len(l))
    if (l[piv] > l[piv2]) and (l[piv2] > l[piv3]):
        piv = piv2
    elif (l[piv] > l[piv3]) and (l[piv3] > l[piv2]):
        piv = piv3
    elif (l[piv] < l[piv2]) and (l[piv2] < l[piv3]):
        piv = piv2
    elif (l[piv] < l[piv3]) and (l[piv3] < l[piv2]):
        piv = piv3
    else:
        pass
    mini = []
    middlei = []
    maxi = []

    for i in range(0,len(l)):
        if l[i] == l[piv]:
            middlei.append(l[i])
        elif l[piv] > l[i]:
            mini.append(l[i])
        elif l[piv] <= l[i]:
            maxi.append(l[i])
    mini = qui(mini)
    maxi = qui(maxi)
    return mini+ middlei+maxi
input()
list1 = input().split(" ")
for i in range(0, len(list1)):
    list1[i] = int(list1[i])

result = qui(list1)

print(' '.join(map(str, result)))
a,b=input().split()
a=int(a)
b=list(b)
b=[int(b[0]),int(b[2]),int(b[3])]
c=a*b[0]+a*b[2]//10+a*b[3]//100
print(c)

### FIXED CODE ###

a,b=input().split()
a=int(a)
b=list(b)
b=[int(b[0]),int(b[2]),int(b[3])]
c=(a*b[0]*100+a*b[1]*10+a*b[2])//100
print(c)
h,w=map(int,input().split())
if h==w==1:
    print(1)
    sys.exit()
if h%2==0 and w%2==0:
    print(int(h*w/2))
elif h%2==1 and w%2==1:
    print(int(h*w/2)+1)
else:
    print(int(h*w/2))

### FIXED CODE ###

import sys
h,w=map(int,input().split())
if h==1 or w==1:
    print(1)
    sys.exit()
if h%2==0 and w%2==0:
    print(int(h*w/2))
elif h%2==1 and w%2==1:
    print(int(h*w/2)+1)
else:
    print(int(h*w/2))
N = int(input())
c = 0
n = 0
list = []
for l in range(1,N+1):
    list = []
    for i in range(1,l+1):
        if i*i + j*j + i*j > l:
            break;       
        for j in range(1,l+1):
            if i*i + j*j + i*j > l:
                break;
            for k in range(1,l+1):
                #print(i,j,k,l)
                if i*i + j*j + k*k + i*j +j*k + i*k > l:
                    break;
                if i*i + j*j + k*k + i*j +j*k + i*k == l:
                    list.append(1)
                    break;
    print(sum(list))

### FIXED CODE ###

N = int(input())
list = [0]*(N+1)
for i in range(1,100):  
    for j in range(1,100):
        a = i*i + j*j + i*j
        for k in range(1,100):
            a = i*i + j*j + k*k + i*j +j*k + i*k
            if a <= N:
                list[a] += 1
for i in range(1,N+1):
    print(list[i])
import.math
A, B, C, D = map(int, input().split())
sita = A*30+B*0.5-B*6
sitas = 0
if sita > 180:
  sitas = 360 - sita
elif -180<= sita < 0:
  sitas = sita * -1
elif sita < -180:
  sitas = sita + 360
else:
  sitas = sita
print(math.sqrt(C**2+D**2-2*C*D*(math.cos(sitas))))

### FIXED CODE ###

def resolve():
    import math
    A, B, H, M = map(int, input().split())
    sita = abs(H*30+M*0.5-M*6)
    if sita > 180:
        sita = 360 - sita
    print(math.sqrt(A**2+B**2-2*A*B*math.cos(math.radians(sita))))
resolve()
N, X = map(int, input().split())
m = [int(input()) for i in range(1, N+1)]

diff = X - sum(m)
print(N+(diff//min(m)))


### FIXED CODE ###

S = str(input())
count = S.count('o')

print(700 + count*100)
S=input()
K=int(input())
S2 = S*2
tmp=0
tmp2=0
for i in range(1,S):
    if S[i-1]==S[i]:
        S[i]="0"
        tmp += 1

for i in range(1,S2):
    if S2[i-1]==S2[i]:
        S[i]="0"
        tmp2 += 1
print(tmp+tmp*(K-1))

### FIXED CODE ###

S=list(input())
K=int(input())
S2 = S*2
tmp=0
tmp2=0

if all([S[i] == S[0] for i in range(1,len(S))]):
    print((len(S)*K)//2)
    exit()
for i in range(1,len(S)):
    if S[i-1]==S[i]:
        S[i]="0"
        tmp += 1

for i in range(1,len(S2)):
    if S2[i-1]==S2[i]:
        S2[i]="0"
        tmp2 += 1

print(tmp+(tmp2-tmp)*(K-1))
n = int(input())
ans = 1;
tem = 0
ok = 1
s = input().split()
for i in s:
    if(int(i) == 0):
        tem = 1
        break
    ans *= int(i) 
    if(ans > 10**18):
        ok = 0
if(tem):
    print(0)
elif(ok)
    print(ans)
else:
    print("-1")


### FIXED CODE ###

n = int(input())
ans = 1;
tem = 0
ok = 1
s = input().split()
for i in s:
    if(int(i) == 0):
        tem = 1
        break
    if(ok == 1):
        ans *= int(i) 
        if(ans > 10**18):
            ok = 0
if(tem):
    print(0)
elif(ok):
    print(ans)
else:
    print("-1")
H, N = map(int, input().split())
x = [list(map(int, input().split())) for n in range(N)]
x = [[tmp[i] for tmp in x] for i in range(len(x[0]))]
A = x[0]
B = x[1]

import sys
sys.setrecursionlimit(max(1000, H))

memo = dict()
def ibis(H):
    if H in memo.keys():
        return memo[H]
    if H <= 0:
        return 0
    mp = []
    for n in range(N):
        mp.append(B[n] + ibis(H - A[n]))
    memo[H] = min(mp)
    return memo[H]

print(ibis(H))

### FIXED CODE ###

H, N = map(int, input().split())
x = [list(map(int, input().split())) for n in range(N)]
x = [[tmp[i] for tmp in x] for i in range(len(x[0]))]
A = x[0]
B = x[1]

def ibis(H, A, B):
    dp = [max(B) * H] * (H + 1)
    dp[0] = 0
    for h in range(H):
        for n in range(N):
            hp = min(h + A[n], H)
            dp[hp] = min(dp[hp], dp[h] + B[n])
    return dp[H]

print(ibis(H, A, B))
def solve(n: int, s: str) -> str:
    def inc(c: str, n: int) -> str:
        tbl = {
            0: 'A',
            1: 'B',
            2: 'C',
            3: 'D',
            4: 'E',
            5: 'F',
            6: 'G',
            7: 'H',
            8: 'I',
            9: 'J',
            10: 'K',
            11: 'L',
            12: 'M',
            13: 'N',
            14: 'O',
            15: 'P',
            16: 'Q',
            17: 'R',
            18: 'S',
            19: 'T',
            20: 'U',
            21: 'V',
            23: 'W',
            24: 'X',
            25: 'Y',
            26: 'Z',
        }
        rev_tbl = {v: k for k, v in tbl.items()}
        idx = (rev_tbl[c] + n) % len(tbl)
        return tbl[idx]

    return ''.join([inc(c, n) for c in s])


n = int(input().strip())
s = input().strip()
print(solve(n, s))


### FIXED CODE ###

def solve(n: int, s: str) -> str:
    def inc(c: str, n: int) -> str:
        tbl = {
            0: 'A',
            1: 'B',
            2: 'C',
            3: 'D',
            4: 'E',
            5: 'F',
            6: 'G',
            7: 'H',
            8: 'I',
            9: 'J',
            10: 'K',
            11: 'L',
            12: 'M',
            13: 'N',
            14: 'O',
            15: 'P',
            16: 'Q',
            17: 'R',
            18: 'S',
            19: 'T',
            20: 'U',
            21: 'V',
            22: 'W',
            23: 'X',
            24: 'Y',
            25: 'Z',
        }
        rev_tbl = {v: k for k, v in tbl.items()}
        idx = (rev_tbl[c] + n) % len(tbl)
        return tbl[idx]

    return ''.join([inc(c, n) for c in s])


n = int(input().strip())
s = input().strip()
print(solve(n, s))
s = input()

for i in range(1, 8):
    a, b = i, 7-i
    l, r = k[:i], k[i:]
    
    if l in s and r in s:
        print("YES")
        exit()

print('NO')


### FIXED CODE ###

s = input()

k = 'keyence'

for i in range(len(s)):
    for j in range(i, len(s)):
        t = s[:i] + s[j:]
        if k == t:
            print('YES')
            exit()

print('NO')
314159265 358979323846264338

### FIXED CODE ###

x,y=list(map(int,input().split()))
c=0
while(True):
    if(x<=y):
        x=x*2
        c+=1
    else:
        break

print(c)
from math import sqrt
x1,x2,y1,y2=map(float, print().split())
a=abs(x1-y1)
b=abs(x2-y2)
s=sqrt(a+b)
print(s)


### FIXED CODE ###

from math import sqrt
x1,x2,y1,y2=map(float,input().split())
a=abs(x1-y1)**2
b=abs(x2-y2)**2
s=sqrt(a+b)
print(s)
N = int(input())
print((10000-n)%1000)

### FIXED CODE ###

N = int(input())
if N%1000 == 0:
    print(0)
else:
    print(1000-N%1000)
x,y=map(int,input().split())
for i in range(x+1):
    if 4*i+(x-i)*2=y:
        print("Yes")
        exit()
print("No")

### FIXED CODE ###

x,y=map(int,input().split())
for i in range(x+1):
    if 4*i+(x-i)*2==y:
        print("Yes")
        exit()
print("No")
n, d = map(int,input().split())
s == 0
for i in range(n):
	x, y = map(int,input().split())
	if x**2 + y**2 <= d**2:
		s = s + 1
		else:
			s = s
print(s)

### FIXED CODE ###

n, d = map(int, input().split())
s = 0
for i in range(n):
	x, y = map(int, input().split())
	if x**2+y**2 <= d**2:
		s += 1
print(s)
def dist(X1,X2):
  d=X1-X2
  d=[x**2 for x in d]
  d=sum(d)
  return d
 
count=int(0)
N,D=map(int,input().split())
X=list(range(N))
for i in range(N):
  X[i]=list(map(int,input().split()))
for i in range(N):
  for j in range(i+1:N):
    d=dist(X[i],X[j])
    if isinstance(d,int):
      count=count+1
print(count)

### FIXED CODE ###

import math

def dist(X1,X2):
  d=[abs(X1[i]-X2[i]) for i in range(len(X1))]
  d=[x**2 for x in d]
  d=sum(d)
  d=math.sqrt(d)
  return d
 
count=int(0)
N,D=map(int,input().split())
X=list(range(N))
for i in range(N):
  X[i]=list(map(int,input().split()))
for i in range(N):
  for j in range(i+1,N):
    d=dist(X[i],X[j])
    if d.is_integer():
      count=count+1
print(count)
n,k=map(int,input().split())
h=list(map(int,input().split()))

h.sort(reverse=True)
if k > 0:
  for i in range(k):
    h[i]=0
print(sum(h))

### FIXED CODE ###

n,k=map(int,input().split())
h=list(map(int,input().split()))

h.sort(reverse=True)

if k>n:
  k=n

for i in range(k):
  h[i]=0

sum_=0
for hh in h:
  sum_+=hh
print(sum_)
import math

N,X=input().split()
N=int(N)
X=int(X)
x = [int(i) for i in input().split()]
x.append(X)
x.sort()
de=[]#deference 差
for i in range( 0, len(x)-1 ):
    dei=x[i+1]-x[i]
    if(dei>0):
        de.append(dei)

#最大公約数だった
#その数を作る素因数をすべて抜き出し、
#一致するものをすべて抜き出せばできる
gcd=de[0]#最大公約数
for i in range(1,len(de)):
    gcd=math.gcd(gcd,de[i])
print(gcd)

### FIXED CODE ###

#import math
import fractions

N,X=input().split()
N=int(N)
X=int(X)
x = [int(i) for i in input().split()]
x.append(X)
x.sort()
de=[]#deference 差
for i in range( 0, len(x)-1 ):
    dei=x[i+1]-x[i]
    if(dei>0):
        de.append(dei)

#最大公約数だった
#その数を作る素因数をすべて抜き出し、
#一致するものをすべて抜き出せばできる
gcddd=de[0]#最大公約数
for i in range(1,len(de)):
    gcddd=fractions.gcd(gcddd,de[i])
print(gcddd)
num = input()
for i in range(len(num)):
  if num[i] == '1':
    num[i] = '9'
  else:
    num[i] = '1'
print(num)

### FIXED CODE ###

num = input()
out = ''
for i in range(len(num)):
  if num[i] == '1':
    out += '9'
  else:
    out += '1'
print(out)
S = input()

if (1 <= S[:2] <= 12) & (1 <= S[2:] <= 12):
    print('AMBIGUOUS')
elif (1 <= S[:2] <= 12) & ((S[2:] == 0) or (13 <= S[2:])):
    print('MMYY')
elif (1 <= S[2:] <= 12) & ((S[:2] == 0) or (13 <= S[:2])):
    print('YYMM')
else:
    print('NA')

### FIXED CODE ###

S = input()

#print(type(S[:2]))
#print(type(int(S[:2])))

if (1 <= int(S[:2]) <= 12) & (1 <= int(S[2:]) <= 12):
    print('AMBIGUOUS')
elif (1 <= int(S[:2]) <= 12) & ((int(S[2:]) == 0) or (13 <= int(S[2:]))):
    print('MMYY')
elif (1 <= int(S[2:]) <= 12) & ((int(S[:2]) == 0) or (13 <= int(S[:2]))):
    print('YYMM')
else:
    print('NA')
n=int(input())
s=input().sort()
print(s[:n]+s[n:])

### FIXED CODE ###

n=int(input())
s=input()
word=""
for i in range(len(s)):
    if ord(s[i])+n>90:
        word+=chr(ord(s[i])+n-26)
    else:
        word+=chr(ord(s[i])+n)
print(word)
H, W, M = map(int, input().split())
h = [0 for i in range(H)]
w = [0 for i in range(W)]
DP = []
for i in range(M):
    hh, ww = map(int, input().split())
    h[hh - 1] += 1
    w[ww - 1] += 1
    DP.append((hh - 1, ww - 1))

hhh = max(h)
www = max(w)
hhhh = [i for i, x in enumerate(h) if x == hhh]
wwww = [i for i, x in enumerate(w) if x == www]
check = 0

print(DP)
print(hhh, www)
print(hhhh, wwww)
for i in hhhh:
    for j in wwww:
        if (i, j) not in DP:
            check = 1
            break
print(hhh + www - (1 - check))


### FIXED CODE ###

H, W, M = map(int, input().split())
h = [0 for i in range(H)]
w = [0 for i in range(W)]
DP = set()
for i in range(M):
    hh, ww = map(int, input().split())
    h[hh - 1] += 1
    w[ww - 1] += 1
    DP.add((hh - 1, ww - 1))

hhh = max(h)
www = max(w)
hhhh = [i for i, x in enumerate(h) if x == hhh]
wwww = [i for i, x in enumerate(w) if x == www]
check = 0

for i in hhhh:
    for j in wwww:
        if (i, j) not in DP:
            print(hhh + www)
            exit()
print(hhh + www - 1)
from math import *
a,b,c,d=map(int,input().split())
lcm=lambda x,y:x*y//gcd(x,y)
def f(a,b,c):
    return (b - a + 1) // c + (1 if b % c <= a % c else 0)

if c != 1 and d != 1:
    print ((b-a+1) - f(a,b,c) - f(a,b,d) + f(a,b,lcm(c,d)))
else:
    print (0)

### FIXED CODE ###

from math import *
from fractions import *
a,b,c,d=map(int,input().split())

def lcm(a,b):
    return a * b // gcd(a, b)

def f(a,b,c):
    return (b - a + 1) // c + (1 if b % c <= a % c else 0)

if c != 1 and d != 1:
    print ((b-a+1) - (b // c - ceil(a / c) + 1) - (b // d - ceil(a / d) + 1) + (b // lcm(c, d) - ceil(a / lcm(c, d)) + 1))
else:
    print (0)
N = int(input())
S = list(map(str,input().split()))
K = int(input())

for i in range(N):
  if S[i] != S[K]:
    S[i] = str("*")
print(S)

### FIXED CODE ###

N = int(input())
S = list(input())
K = int(input())

for i in range(N):
	if S[i] != S[K-1]:
		S[i] = "*"
S_changed = "".join(S)
print(S_changed)
a,b=map(int,input().split())
if a+b=15:
    print('+')
elif a*b=15:
    print('*')
else:
    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())
l = []
for i in range(n):
    s, p = input().split()
    l.appen([s, -int(p), i + 1])

l.sort()
for i in l:
    print(i[2])

### FIXED CODE ###

a, p = list(map(int,input().split()))

ans = (a * 3 + p) // 2
print(ans)
N = (int,input())
if N % 2 == 0:
    print(N // 2);
else:
    print(N // 2 + 1)

### FIXED CODE ###

N = int(input())
if N % 2 == 0:
    print(N // 2);
else:
    print(N // 2 + 1)
s = str(input())

if s == ABC:
  print('ARC')
else:
  if s == ARC:
    print('ABC')

### FIXED CODE ###

s = str(input())

if s == 'ABC':
  print('ARC')
else:
  if s == 'ARC':
    print('ABC')
def main():
    s=input()
    string=('dream','erase')

    i=0
    n=len(s)
    while i<n:
        st=s[i:i+5]
        if st==string[0]:
            i+=5
            st=s[i:i+2]
            if st=='er':
                if s[i+2]!='a':
                    i+=2
        
        elif st==string[1]:
            i+=5
            if i==n:
              break
            if s[i]=='r':
                i+=1
        
        else:
            print('NO')
            exit()
    print('YES')
if  __name__=='__main__':
    main()

### FIXED CODE ###

def main():
    s=input()
    string=('dream','erase')

    i=0
    n=len(s)
    while i<n:
        st=s[i:i+5]
        if st==string[0]:
            i+=5
            st=s[i:i+2]
            if st=='er':
                if i+2==n:
                    break
                if s[i+2]!='a':
                    i+=2
        
        elif st==string[1]:
            i+=5
            if i==n:
                break
            if s[i]=='r':
                i+=1
        
        else:
            print('NO')
            exit()
    print('YES')
if  __name__=='__main__':
    main()
N,X=map(int,input().split())
m=[]
for i in range(N):
    m.append(int(input()))

res=X-sum(m)
num=N
while res>min(m):
    c=math.floor(res/min(m))
    num+=c
    res=res-c*min(m)
print(num)


### FIXED CODE ###

import math
N,X=map(int,input().split())
m=[int(input()) for i in range(N)]
res=X-sum(m)
num=N
while res>min(m):
    c=math.floor(res/min(m))
    num+=c
    res=res-c*min(m)
print(num)
import math
N,D,A=map(int,input().split())
l=[]
for i in range(N):
  k=list(map(int,input().split()))
  l.append(k)
l.sort()
ans=0
for i in range(N):
  h=l[i][1]
  if h<=0:continue
  d=l[i][0]+D
  time=math.ceil(h/A)
  s=set()
  for j in range(i,n):
    if abs(d-l[j][0])<=D:
      s.add(j)
    else:break
  for k in s:
    l[k][1]-=time*A
  ans+=time
print(ans)
  	


### FIXED CODE ###

import math
N,D,A=map(int,input().split())
l=[]
for i in range(N):
  k=list(map(int,input().split()))
  l.append(k)
l.sort()
S=[0]*N
ma=[0]*N
tmp=N-1
for i in reversed(range(N)):
  x=l[i][0]
  for j in reversed(range(0,tmp)):
    if abs(l[j][0]-(x-D))>D:
      ma[i]=j+1
      tmp=j+1
      break
  else:
    ma[i]=0
    tmp=0
ans=0
S[0]=math.ceil(l[0][1]/A)
for i in range(1,N):
  h=l[i][1]
  left=S[ma[i]-1] if ma[i]>0 else 0
  right=S[i-1]
  sum_=(right-left)*A
  if h<=sum_:
    S[i]=S[i-1]
    continue
  time=math.ceil((h-sum_)/A)
  S[i]=time+S[i-1]
print(S[N-1])