Harryxun/sft_time huggingface dataset:
### BUGGY CODE ###


def verify_anagrams(w1, w2):
    f = lambda y: "".join(sorted(map(lambda x: x.replace(' ', '').lower(), y)))
    return f(w1) == f(w2)
#print(verify_anagrams(s,s2))
N = int(input())
ans = 0
words = [input() for _ in range(N)]
for i in range(N):
    for j in range(i+1,N):
        if verify_anagrams(words[i],words[j]):
            ans += 1
print(ans)

### FIXED CODE ###


def verify_anagrams(w1, w2):
    f = lambda y: "".join(sorted(map(lambda x: x.replace(' ', '').lower(), y)))
    return f(w1) == f(w2)
#print(verify_anagrams(s,s2))
N = int(input())
ans = 0
unmatch_words = []
words = {}
for i in range(N):
    s = input()
    sorted_s = "".join(sorted(s))
    #print(sorted_s)
    if sorted_s in words:
        ans += words[sorted_s]
        words[sorted_s] += 1
    else:
        words[sorted_s] = 1


print(ans)
### BUGGY CODE ###

#!/usr/bin/python

import sys

def main(argv):
    line = sys.stdin.readline()
    while line:
        N, M = map(lambda x: int(x), line.split(" ", 2))

        services_1 = []
        services_n = []
        for i in xrange(M):
            a, b = map(lambda x: int(x), sys.stdin.readline().split(" ", 2))
            if a == 1:
                services_1.append(b)
            if b == N:
                services_n.append(a)

        if 1 in services_n:
            print("POSSIBLE")

        result = "IMPOSSIBLE"
        for service in services_n:
            if service == 1 or service in services_1:
                result = "POSSIBLE"
                break
        print result                

        line = sys.stdin.readline()

if __name__ == "__main__":
    main(sys.argv)

### FIXED CODE ###

#!/usr/bin/python

import sys

def main(argv):
    line = sys.stdin.readline()
    while line:
        N, M = map(lambda x: int(x), line.split(" ", 2))

        services_1 = {}
        services_n = []
        for i in xrange(M):
            a, b = map(lambda x: int(x), sys.stdin.readline().split(" ", 2))
            if a == 1:
                services_1[b] = True
            if b == N:
                services_n.append(a)

        if 1 in services_n:
            print("POSSIBLE")

        result = "IMPOSSIBLE"
        for service in services_n:
            if service == 1 or service in services_1:
                result = "POSSIBLE"
                break
        print result                

        line = sys.stdin.readline()

if __name__ == "__main__":
    main(sys.argv)
### BUGGY CODE ###

import math
import time

t = time.time()
def iip():
    return [int(i) for i in input().split()]

H, N = iip()
mp_for_damage = [10**9 for i in range(H+1)]
mp_for_damage[0] = 0
ab = []

for i in range(N):
    ab.append(iip())

ab= sorted(ab, key=lambda x:x[1], reverse=True)

for i in range(N):
    a, b = ab[i]
    for j in range(H+1):
        if a < H and mp_for_damage[a] < b:
            continue

        for k in range(1, a):
            if k > H:
                break
            mp_for_damage[k] = min(mp_for_damage[k], b)

        if j + a > H:
            break
        mp_for_damage[j+a] = min(mp_for_damage[j+a], mp_for_damage[j] + b)

#print(mp_for_damage)
print(mp_for_damage[H])

#print(time.time() - t)

### FIXED CODE ###

import math
import time


t = time.time()
def iip():
    return [int(i) for i in input().split()]

def main():
    H, N = iip()
    mp_for_damage = [10**9 for i in range(H+1)]
    mp_for_damage[0] = 0
    ab = []

    for i in range(N):
        ab.append(iip())

    ab= sorted(ab, key=lambda x:x[0]/x[1], reverse=True)

    for i in range(N):
        a, b = ab[i]

        for k in range(1, min(a, H) + 1):
            mp_for_damage[k] = min(mp_for_damage[k], b)
            # print(k, b)

        if a >= H:
            mp_for_damage[H] = min(mp_for_damage[H], b)
            continue

        if a < H and mp_for_damage[a] < b:
            continue

        for j in range(H-a+1):
            mp_for_damage[j+a] = min(mp_for_damage[j+a], mp_for_damage[j] + b)

    #print(mp_for_damage)
    #print(mp_for_damage)
    print(mp_for_damage[H])

    #print(time.time() - t)

main()
### BUGGY CODE ###

n = int(input())
l = []
r = [0]*10**5
res = 0

num = 0

for i in range(n):
    an = list(input())
    an.sort()
    an = "".join(map(str, an))
    #print(an)
    if an not in l:
        l.append(an)
        num += 1
    r[l.index(an)] += 1

z = 0
r = r[:num]
#print(r)
for i in range(1,max(r)+1):
    #print(j)
    z += i-1
    if i in r:
        res += z*r.count(i)
else:
    print(res)


### FIXED CODE ###

# original_author prd_xxx
from collections import Counter

N = int(input())
S = [input() for i in range(N)]

# collections.Counter()を使うと0回目の時にバグらないので23行目elseを省略可能
ctr = Counter()
ctr = {}
ans = 0

for s in S:
    # 文字列を昇順に並べ替え
    # 文字列をリスト化し、sortしたものを文字列化
    a = ''.join(sorted(list(s)))

    # ソート済み文字列が以前に存在していたら、答えに前回の合計値を加算する
    # 1..0 2..1 3..3 4..6 5..10 ... 組み合わせの数n(n-1)/2があり、
    # 最後にO(n)で計算も可能だが、冗長。
    # 一個ずつ処理していくと、
    # 1..0 2..+1(1) 3..+2(3) 4..+3(6) 5..+4(10)の増加になる
    if a in ctr:
        ans += ctr[a]
    else:
        ctr[a] = 0

    ctr[a] += 1

print(ans)
### BUGGY CODE ###

n = int(input())
if n % 2:
    temp = int((1 + n-1) * ((n-1) / 2))
else:
    temp = int((1 + n-1) * ((n-1) // 2) + -(-n // 2))
for i in range(1, n):
    if n % (i+1) > i:
        temp += n-i
print(temp)

### FIXED CODE ###

n = int(input())
print(n * (n-1)//2)
### BUGGY CODE ###

from collections import deque
n,x,y=map(int,input().split())
t=deque()
for i in range(1,n+1):
    for j in range(i+1,n+1):
        t.append(min(abs(j-i),abs(i-x)+abs(j-y)+1))



for k in range(1,n):
    print(t.count(k))

### FIXED CODE ###


n,x,y=map(int,input().split())
t=[0]*n
for i in range(1,n+1):
    for j in range(i+1,n+1):
        t[min(abs(j-i),abs(i-x)+abs(j-y)+1)]+=1


print(*t[1:],sep='\n')
### BUGGY CODE ###

n,q = map(int,input().split())
s = str(input())
k = [ 1 if s[i-1] == "A" and s[i] == "C" else 0  for i in range(n)]
#print(k)
for i in range(q):
    a,b = map(int,input().split())
    a -= 1
    b -= 1
    #print(k[a:b+1])
    ans = sum(k[a:b+1])
    if k[a] == 1:
        ans -= 1
    print(ans)

### FIXED CODE ###

from itertools import *
n,q = map(int,input().split())
s = str(input())
k = [ 1 if s[i-1] == "A" and s[i] == "C" else 0  for i in range(n)]
cumsum = list(accumulate(k))
#print(k)
#print(cumsum)
for i in range(q):
    a,b = map(int,input().split())
    a -= 1
    b -= 1
    #print(k[a:b+1])
    ans = cumsum[b] - cumsum[a]
    """
    if k[a] == 1:
        ans -= 1
    """
    print(ans)
### BUGGY CODE ###

class my_tree:
    def __init__(self):
        self.t = {}
    def addNode(self, i, c=[]):
        self.t[i] = {'parent':-1, 'type': 'root', 'c':c}
        ti = self.t[i]
        for j in self.t.keys():
            tj = self.t[j]
            if j in ti['c'] :
                tj['parent'] = i
                if tj['c']:
                    tj['type'] = 'internal node'
                else:
                    tj['type'] = 'leaf'
            elif i in tj['c']:
                ti['parent'] = j
                if ti['c']:
                    ti['type'] = 'internal node'
                else:
                    ti['type'] = 'leaf'
    def getDepth(self, i):
        p_id = self.t[i]['parent']
        if p_id==-1: return 0
        return self.getDepth(p_id) + 1
    def getParentId(self, i): return self.t[i]['parent']
    def getNodeType(self, i): return self.t[i]['type']
    def getChildren(self, i): return self.t[i]['c']
    def getIdList(self)     : return sorted(self.t.keys())

if __name__=='__main__':
    n = int(input())
    tree = my_tree()
    for _ in range(n):
        node = list(map(int,input().split()))
        i = node[0]
        c = node[2:] if node[1] > 0 else []
        tree.addNode(i,c)
    
    for i in tree.getIdList():        
        print("node {0}: parent = {1}, depth = {2}, {3}, {4}".format(\
                i, tree.getParentId(i), tree.getDepth(i), tree.getNodeType(i), tree.getChildren(i)))

### FIXED CODE ###

from collections import namedtuple
Node = namedtuple('Node', ['parent', 'children'])

class my_tree:
    def __init__(self, N=[]):
        self.T = {}
        for ni in N: self.addNode(ni)

    def addNode(self, n):
        p = self.T.get(n[0],Node(-1,[None])).parent
        self.T[n[0]] = Node(p,n[2:])
        for c in n[2:]:
            cc = self.T.get(c,Node(-1,[None])).children
            self.T[c] = Node(n[0],cc)

    def getParent(self, i): return self.T[i].parent

    def getChildren(self, i): return self.T[i].children

    def getDepth(self, i):
        if self.T[i].parent == -1: return 0
        return self.getDepth(self.T[i].parent) + 1

    def getNodeType(self, i):
        if self.T[i].parent == -1: return 'root'
        if self.T[i].children    : return 'internal node'
        return 'leaf'

    def getIdList(self): return sorted(self.T.keys())

 
if __name__=='__main__':
    n = int(input())
    N = [None]*n
    for i in range(n): N[i] = list(map(int,input().split()))
    tree = my_tree(N)
     
    for i in tree.getIdList():        
        print("node {0}: parent = {1}, depth = {2}, {3}, {4}".format(\
                i, tree.getParent(i), tree.getDepth(i), tree.getNodeType(i), tree.getChildren(i)))
### BUGGY CODE ###

n=int(input())
S=input()
dictR=[]
dictG=[]
dictB=[]
for i in range(len(S)):
    if S[i]=="R":
        dictR.append(i)
    elif S[i]=="G":
        dictG.append(i)
    else:
        dictB.append(i)
sum=len(dictR)*len(dictG)*len(dictB)
if sum!=0:
    for i in dictR:
        for j in dictG:
            for k in dictB:
                maxi=max(i,max(j,k))
                mini=min(i,min(j,k))
                medi=i+j+k-maxi-mini
                if maxi-medi==medi-mini:
                    sum-=1

print(sum)

### FIXED CODE ###

n=int(input())
S=input()
R={}
G={}
B={}
r=0
g=0
b=0
for i in range(n):
    if S[i] == 'R':
        R[i] = None
    elif S[i] == 'G':
        G[i] = None
    else:
        B[i] = None
cnt=len(R)*len(G)*len(B)
for b in B:
    for g in G:
        if (b+g)/2 in R:
            cnt-=1
for b in B:
    for r in R:
        if (b+r)/2 in G:
            cnt-=1
for r in R:
    for g in G:
        if (r+g)/2 in B:
            cnt-=1
print(cnt)
### BUGGY CODE ###

n = int(input())
Ls = list(map(int, input().split()))
cnt = 0


def check(a, b, c):
    if a < b+c and b < c + a and c < a + b:
        return True
    else:
        return False


for i in range(n):
    for j in range(i+1, n):
        a = Ls[i]
        b = Ls[j]
        M = [Ls[m] for m in range(j+1, n)]
        if M:
            if a - b >= max(M) or b - a >= max(M) or min(M) >= a + b:
                continue
        for k in range(j+1, n):
            if check(a, b, Ls[k]):
                cnt += 1
print(cnt)


### FIXED CODE ###

import sys
from math import ceil, floor
from collections import deque, Counter, defaultdict
from fractions import gcd
from bisect import bisect_right
input = lambda: sys.stdin.readline().rstrip()


def eprint(s):
    sys.stderr.write('DEBUG: {}'.format(s))
    return


def main():
    n = int(input())
    Ls = list(map(int, input().split()))
    Ls.sort()
    cnt = 0
    for i in range(0,n-2):
        for j in range(i+1,n-1):
            #k以下なら良い
            k =  Ls[i] + Ls[j] -1
            # bisect_right(Ls, k)個の要素が左にある
            # 答え: bisect_right(Ls, k) - j
            cnt += max(bisect_right(Ls, k) - j-1, 0)
            # print(Ls, Ls[i],Ls[j],k, bisect_right(Ls,k)-j-1)
    print(cnt)
            

if __name__ == '__main__':
    main()
### BUGGY CODE ###

import sys
from bisect import bisect as br, bisect_left as bl
readline = sys.stdin.readline

N = int(readline())
A = list(map(int, readline().split()))
B = list(map(int, readline().split()))
A.sort()
B.sort()
cnta = [0]*29
cntb = [0]*29
for idx in range(N):
    a, b = A[idx], B[idx]
    for i in range(29):
        if (1<<i) & a:
            cnta[i] = 1 - cnta[i]
        if (1<<i) & b:
            cntb[i] = 1 - cntb[i]

carry = [0]*30
bwa = [0]*N
bwb = [0]*N
for i in range(29):
    for idx in range(N):
        if (1<<i) & B[idx]:
            bwb[idx] |= 1<<i
    bwbc = sorted(bwb)
    m = (1<<(i+1))-1
    for idx in range(N):
        a = A[idx]&m 
        carry[i+1] += (N - bl(bwbc, m+1 if a == 0 else m&(-a)))%2
        
ans = 0
for i in range(29):
    if (carry[i] + (cnta[i]+cntb[i])*N) % 2 == 1:
        ans |= 1<<i
print(ans)

### FIXED CODE ###

import sys
readline = sys.stdin.readline

N = int(readline())
A = list(map(int, readline().split()))
B = list(map(int, readline().split()))
A.sort()
B.sort()
cnta = [0]*29
cntb = [0]*29
for idx in range(N):
    a, b = A[idx], B[idx]
    for i in range(29):
        if (1<<i) & a:
            cnta[i] = 1 - cnta[i]
        if (1<<i) & b:
            cntb[i] = 1 - cntb[i]

carry = [0]*30
bwa = [0]*N
bwb = [0]*N
for i in range(29):
    m = (1<<(i+1))-1
    bwbc = sorted([b&m for b in B])
    bwac = sorted([m+1 if a&m == 0 else m&(-(a&m)) for a in A])
    r = N
    for idx in range(N-1, -1, -1):
        a = bwac[idx]
        while r and bwbc[r-1] >= a:
            r -= 1
        carry[i+1] += N - r
        
ans = 0
for i in range(29):
    if (carry[i] + (cnta[i]+cntb[i])*N) % 2 == 1:
        ans |= 1<<i
print(ans)
### BUGGY CODE ###

d1 = {}
def popcount(n):
    if n not in d1:
        q = n
        s = 0
        while q > 0:
            q, r = divmod(q, 2)
            s += r
        d1[n] = s
    return d1[n]

d2 = {}
def f(n):
    X = [n]
    c = 0
    while n != 0:
        if n in d2:
            k = d2[n]
            break
        n %= popcount(n)
        c += 1
        X.append(n)
    else:
        k = 0
    for i, x in enumerate(X[::-1]):
        d2[x] = i+ k
    return c + k

n, X = open(0).read().split()
n = int(n)
x = int(X, 2)
X = list(map(int, X))
c = popcount(x)
for i in range(n):
    if X[i]:
        y = x - 2**(n-i-1)
        t = c-1
    else:
        y = x + 2**(n-i-1)
        t = c+1
    if y != 0:
        print(f(y%t) + 1)
    else:
        print(0)

### FIXED CODE ###

n, X = open(0).read().split()
n = int(n)
x = int(X, 2)
X = list(map(int, X))

def popcount(n):
    return bin(n).count('1')

ma = 2 * 10**5 + 1
dp = [0] * ma
for i in range(1, ma):
    dp[i] = dp[i % popcount(i)] + 1

c = popcount(x)
a = x % (c+1)
if c == 1:
    for i in range(n):
        if X[i]:
            print(0)
        else:
            print(dp[(a + pow(2, n-i-1, c+1)) % (c+1)] + 1)
else:
    b = x % (c-1)
    for i in range(n):
        if X[i]:
            print(dp[(b - pow(2, n-i-1, c-1)) % (c-1)] + 1)
        else:
            print(dp[(a + pow(2, n-i-1, c+1)) % (c+1)] + 1)
### BUGGY CODE ###

def main():
  N, K, C=map(int, input().split())
  S = input()
  L,R=[0]*K,[0]*K
  n, k=0, 0
  while k < K:
    if S[n]=='o':
      L[k]=n+1
      k+=1
      n += C
    n+=1
  #print(L)
  S=S[::-1]
  n, k=0, 0
  while k < K:
    if S[n]=='o':
      R[k]=N-n
      k+=1
      n += C
    n+=1

  for l in L:
    if l in R:
      print(l)

if __name__=='__main__':
  main()


### FIXED CODE ###

def main():
  N, K, C=map(int, input().split())
  S = input()

  R=[0]*K
  n, k=N-1, 0
  while k < K:
    if S[n]=='o':
      R[k]=n+1
      k+=1
      n -= C
    n-=1
  R=R[::-1]
  
  n, k=0, 0
  while k < K:
    if S[n]=='o':
      if n+1 == R[k]:
        print(n+1)
      k+=1
      n += C
    n+=1
  #print(L)
  

  
if __name__=='__main__':
  main()
### BUGGY CODE ###

from sys import stdin
import sys
import math

K = int(input())

amount = 0
for a in range(1, K+1):
    for b in range(1, K+1):
        for c in range(1, K+1):
            amount += math.gcd(a, math.gcd(b, c))

print(amount)


### FIXED CODE ###

import math

K = int(input())

amount = 0
for a in range(1, K+1):
    for b in range(1, K+1):
        gcd_ab = math.gcd(a, b)
        for c in range(1, K+1):
            amount += math.gcd(gcd_ab, c)

print(amount)
### BUGGY CODE ###

a, b, q = list(map(int, input().split()))
s = [int(input()) for _ in range(a)]
t = [int(input()) for _ in range(b)]
x = [int(input()) for _ in range(q)]

def bs(z, st):
    l = 0
    r = len(st) - 1
    while r - l != 1:
        m = (l + r) // 2
        if st[m] == z:
            return m
        elif st[m] < z:
            l = m
        else:
            r = m
    return l

for xi in x:
    tmps = []
    tmpt = []
    if xi <= s[0]:
        tmps.append(s[0] - xi)
    elif s[-1] <= xi:
        tmps.append(s[-1] - xi)
    else:
        tmp = bs(xi, s)
        tmps.append(s[tmp] - xi)
        tmps.append(s[tmp + 1] - xi)

    if xi <= t[0]:
        tmpt.append(t[0] - xi)
    elif t[-1] <= xi:
        tmpt.append(t[-1] - xi)
    else:
        tmp = bs(xi, t)
        tmpt.append(t[tmp] - xi)
        tmpt.append(t[tmp + 1] - xi)
    anss = []
    for i in tmps:
        for j in tmpt:
            if i // abs(i) == j // abs(j):
                anss.append(max(abs(i), abs(j)))
            else:
                maxij = max(abs(i), abs(j)) 
                minij = min(abs(i), abs(j)) 
                anss.append(abs(maxij + minij * 2))
    anss.sort()
    print(anss[0])

### FIXED CODE ###

a, b, q = list(map(int, input().split()))
s = [int(input()) for _ in range(a)]
t = [int(input()) for _ in range(b)]
x = [int(input()) for _ in range(q)]

def bs(z, st):
    l = 0
    r = len(st) - 1
    while r - l != 1:
        m = (l + r) // 2
        if st[m] <= z:
            l = m
        else:
            r = m
    return l

for xi in x:
    tmps = []
    tmpt = []
    if xi <= s[0]:
        tmps.append(s[0] - xi)
    elif s[-1] <= xi:
        tmps.append(s[-1] - xi)
    else:
        tmp = bs(xi, s)
        tmps.append(s[tmp] - xi)
        tmps.append(s[tmp + 1] - xi)

    if xi <= t[0]:
        tmpt.append(t[0] - xi)
    elif t[-1] <= xi:
        tmpt.append(t[-1] - xi)
    else:
        tmp = bs(xi, t)
        tmpt.append(t[tmp] - xi)
        tmpt.append(t[tmp + 1] - xi)
    anss = []
    for i in tmps:
        for j in tmpt:
            if i // abs(i) == j // abs(j):
                anss.append(max(abs(i), abs(j)))
            else:
                maxij = max(abs(i), abs(j)) 
                minij = min(abs(i), abs(j)) 
                anss.append(abs(maxij + minij * 2))
    anss.sort()
    print(anss[0])
### BUGGY CODE ###

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

banned_list = []
for i in range(M):
    banned_list.append(tuple(map(int,input().split())))

banned_list = sorted(banned_list,key=lambda x:x[1])
status = [1 for _ in range(N-1)]
counter = 0
for i in range(M):
    a = banned_list[i][0]
    b = banned_list[i][1]
    if not 0 in status[a-1:b-1]:
        counter += 1
        status[b-2] = 0
print(counter)

### FIXED CODE ###

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

banned_list = []
for i in range(M):
    banned_list.append(tuple(map(int,input().split())))
banned_list = sorted(banned_list,key=lambda x:x[1])
#status = [1 for _ in range(N-1)]
status = set()
counter = 0
for i in range(M):
    a = banned_list[i][0]
    b = banned_list[i][1]
    if len([one for one in status if (one >= a-1 and one < b-1)]) == 0:
        status  |= {b-2}
        counter += 1
print(counter)
### BUGGY CODE ###

K,S = map(int,input().split())
count = 0

for a in range(K+1):
    for b in range(K+1):
        for c in range(K+1):
            if a+b+c == S:
                count =count +1

print(count)

### FIXED CODE ###

K,S = map(int,input().split())
count = 0
for a in range(K+1):
    for b in range(K+1):
        x = S - (a+b)
        if x <= K and  x >= 0:
            count = count + 1
                
print(count)
### BUGGY CODE ###

#!/usr/bin/env python3
import sys

MOD = 1000000007  # type: int


def solve(N: int, A: "List[int]"):
    a_sum = [int()]*60

    for a in A:

        for i, r_a in enumerate(format(a, "b")[::-1]):
            if r_a == "1":
                a_sum[i] += 1

    a_sum = [a_s_*(2**i)%MOD for i, a_s_ in zip(range(60), a_sum)]

    ans = 0
    for a in A:
        for i, r_a in enumerate(format(a, "b")[::-1]):
            if r_a == "0":
                ans += a_sum[i]
        
        for ic in range(i+1,60):
            ans+=a_sum[ic]
            ans%=MOD

    print(ans%MOD)

    return


# Generated by 1.1.6 https://github.com/kyuridenamida/atcoder-tools  (tips: You use the default template now. You can remove this line by using your custom template)
def main():
    def iterate_tokens():
        for line in sys.stdin:
            for word in line.split():
                yield word
    tokens = iterate_tokens()
    N = int(next(tokens))  # type: int
    A = [int(next(tokens)) for _ in range(N)]  # type: "List[int]"
    solve(N, A)

if __name__ == '__main__':
    main()


### FIXED CODE ###

#!/usr/bin/env python3
import sys

MOD = 1000000007  # type: int


def solve(N: int, A: "List[int]"):
    A = [format(a, "b")[::-1] for a in A]
    a_sum = [int()]*60

    for a in A:
        for i, r_a in enumerate(a):
            if r_a == "1":
                a_sum[i] += 1

    a_sum = [a_s_*(2**i)%MOD for i, a_s_ in zip(range(60), a_sum)]
    a_acc_sum = [_ for _ in a_sum]
    
    for x in range(1,60):
        a_acc_sum[x] = a_acc_sum[x-1] + a_acc_sum[x] 
    
    ans = 0
    for a in A:
        for i, r_a in enumerate(a):
            if r_a == "0":
                ans += a_sum[i]
        
        ans += a_acc_sum[59] - a_acc_sum[i]

        # for ic in range(i+1,60):
            # ans+=a_sum[ic]
            # ans%=MOD

    print(ans%MOD)

    return


# Generated by 1.1.6 https://github.com/kyuridenamida/atcoder-tools  (tips: You use the default template now. You can remove this line by using your custom template)
def main():
    def iterate_tokens():
        for line in sys.stdin:
            for word in line.split():
                yield word
    tokens = iterate_tokens()
    N = int(next(tokens))  # type: int
    A = [int(next(tokens)) for _ in range(N)]  # type: "List[int]"
    solve(N, A)

if __name__ == '__main__':
    main()
### BUGGY CODE ###

N=int(input())
number=list(map(int,input().split()))
Q=int(input())
for i in range(Q):
    B,C=map(int,input().split())
    if B in number:
        for i in range(N):
            if number[i]==B:
                number[i]=C
    print(sum(number))

### FIXED CODE ###

from collections import Counter
N=int(input())
number=list(map(int,input().split()))
sum_number=sum(number)
Q=int(input())
number_count=Counter(number)


for _ in range(Q):
    B,C=map(int,input().split())
    sum_number += (C-B)*number_count[B]
    number_count[C] += number_count[B]
    number_count[B] = 0
    print(sum_number)
### BUGGY CODE ###

import bisect
import sys
input = sys.stdin.buffer.readline
N,D,A= map(int,input().split())
XH = [list(map(int,input().split())) for i in range(N)]
XH.sort()
X,H = [list(x) for x in zip(*XH)]

ans = 0
for i in range(N):
    x = X[i]
    if H[i] <= 0:
        continue
    cnt_bom = -(-H[i] // A)
    ans += cnt_bom
    damage = cnt_bom * A
    ind = bisect.bisect_right(X,x+2*D)
    for j in range(i,ind):
        H[j] -= damage
print(ans)


### FIXED CODE ###

import bisect
import sys
input = sys.stdin.buffer.readline
N,D,A= map(int,input().split())
XH = [list(map(int,input().split())) for i in range(N)]
XH.sort()
X,H = [list(x) for x in zip(*XH)]

ans = 0
cum = [0]*N
dam = 0
for i in range(N):
    dam += cum[i]
    H[i] -= dam
    x = X[i]
    if H[i] <= 0:
        continue
    cnt_bom = -(-H[i] // A)
    ans += cnt_bom
    damage = cnt_bom * A
    ind = bisect.bisect_right(X,x+2*D)
    if i+1 < N:
        cum[i+1] += damage 
    if ind < N:
        cum[ind] -=damage 

print(ans)