n = input()a = 99print('Hello, world!', n, '99 bottles of beer on the wall, 99 bottles of beer. ')print('Take one down and pass it around, ', end='')for i in range(1, 98):  a -= 1  print(a, 'bottles of beer on the wall. ')  print(a, 'bottles of beer on the wall,', a, 'bottles of beer. ')  print('Take one down and pass it around, ', end='')print('1 bottle of beer on the wall. ')print('1 bottle of beer on the wall, 1 bottle of beer. ')print('Take one down and pass it around, no more bottles of beer on the wall. ')print('No more bottles of beer on the wall, no more bottles of beer. ')print('Go to the store and buy some more, 99 bottles of beer on the wall. ')

# data = [ # ['*x*'], # [' xx'], # ['* *'] # ] # # n = int(input()) # for i in range(len(data)): # for x in range(n): # for j in range(len(data[i])): # for y in range(n): # print(data[i][j], end='') # print() # data = [ # ['*x*'], # [' xx'], # ['* *'] # ] # # data = [ # ['*','x','*'], # [' ','x','x'], # ['*',' ','*'] # ] # # data[0] = list(data[0]) # # print(data) # # for i in range(3): # print(data[i][0]) # data = [ # ['*','x','*'], # [' ','x','x'], # ['*',' ','*'] # ] # # n = int(input()) # for i in range(len(data)): # for x in range(n): # for j in range(len(data[i])): # for y in range(n): # print(data[i][j], end='') # print() n = input() a = 99 print('Hello, world!', n, '99 bottles of beer on the wall, 99 bottles of beer. ') print('Take one down and pass it around, ', end='') for i in range(98): a -= 1 print(a,'bottles of beer on the wall. ') print(a, 'bottles of beer on the wall,', a, 'bottles of beer. ') print('Take one down and pass it around, ', end='') print('1 bottle of beer on the wall. ') print('1 bottle of beer on the wall, 1 bottle of beer. ') print('Take one down and pass it around, no more bottles of beer on the wall. ') print('No more bottles of beer on the wall, no more bottles of beer. ') print('Go to the store and buy some more, 99 bottles of beer on the wall. ')

data = [    ['*x*'],    [' xx'],    ['* *']]a = int(input())for i in range(len(data)):    for j in range(len(data[i])):        for k in range(a):            print(data[i][j],end='')    print()

data = [ ['*x*'], [' xx'], ['* *'] ] a = int(input()) for i in range(len(data)): for j in range(len(data[i])): for k in range(len(data[i][j])): for q in range(a): print(data[i][j], end='') print()

data = [ ['*x*'], [' xx'], ['* *'] ] a = int(input()) for i in range(a): for j in range(a): print(data, end='') print()

a = list(input().split()) b = list(input().split()) x1, y1, x2, y2 x3, y3, x4, y4 2 5 6 9 2 6 6 10 꼭짓점 = 같은거 2개(문자 다음 숫자가 같아야하며 x1, y1 이랑 x4, y4가 같다고 할때 x3, y3가 x2, y2 보다 커지면 FACE가 된다) 모서리 = x1, x2랑 x3, x4가 같아야됨. 그리고 y3, y4가 y1, y2보다 작아야됨. y도 똑같이 적용됨 겹치는거1 = 겹치는거2 = 나머지 = 2 5 6 9 1 3 5 8

# a = list(input().split()) # a.sort() # print(*a) # a = [int(x) for x in input().split()] # a.sort() # print(*a) 꼭짓점 = 같은거 2개 모서리 = 같은거 1개 겹치는거1 = (else로 처리) 겹치는거2 = x1, x2, y1, y2 보다 작거나 같음(else로 처리) 나머지 = 겹치는게 없음

#include<stdio.h> int main() { int n, i, s[51], a=0; scanf("%d", &n); for(i=0; i<n-1; i++) { scanf("%d", &s[i]); a += s[i]; } printf("%d",n*(n+1)/2-a); return 0; }

# a = int(input()) # n = a // 3600 # b = n # x = (a % 3600) // 60 # y = a % 60 # print(b, x, y) # a = int(input()) # b = a // 3600 # n = b # x = (a % 3600) // 60 # y = a % 60 # print(n, x, y) import math # math.sqrt(10) # 3*3 = 9 # sqrt(9) > 3 # import math # # x1, y1 = map(int, input().split()) # x2, y2 = map(int, input().split()) # # p = math.sqrt((x1-x2) (x1-x2) + (y1-y2) (y1-y2)) # print("{:.2f}".format(p)) a, b = map(int, input().split()) x = 0 y = 0 n = 0 for i in range(a < b): if a >= b: a -= 2 print(a)

# a = list(input().split()) # a.reverse() # print(*a) a, b = list(map(int, input().split())) k = 0 t = 0 x = [i for i in range(a, b + 1) if i % 3 == 0] y = [i for i in range(a, b + 1) if i % 4 == 0] for i in range(len(x)): k += x[i] for i in range(len(y)): t += y[i] print(k + (-t))

# a = input() # for i in range(len(a)): # if a[i] != ' ': # x = ord(a[i]) - 3 # if x < ord('a'): # x += 26 # x = chr(x) # print(x, end='') # else: # print(' ', end='') # a = list(map(int, input().split())) # a.sort(reverse=True) # print(*a) # a = list(map(int, input().split())) # a.reverse() # print(*a) # a = list(map(int, input().split())) # n = sum(a) # b = n / len(a) # print(round(b, 1)) # x = 0 # y = 0 # for i in range(len(a)): # if a[i] >= b: # x += 1 # else: # y += 1 # print(x, y)

# n = input() # a = list(map(int, input().split())) # a.sort(reverse=True) # print(a[0]) # a = input() # for i in range(len(a)): # if a[i] != ' ': # x = ord(a[i]) - 3 # if x < ord('a'): # x += 26 # x = chr(x) # print(x, end='') # else: # print(' ', end='') # # a = int(input()) # for i in range(a): # print('hello') # a, b = map(int, input().split()) # n = a / b # print(round(n, 1)) # print(int(n)) # print(a**b)

# a = list(map(int, input().split())) # a.sort() # for i in a: # print(i, end=' ') # a1, a2 = map(int, input().split()) # b1, b2 = map(int, input().split()) # c1, c2 = map(int, input().split()) # d = a1 * a2 # e = b1 * b2 # f = c1 * c2 # # if e > d and e > f: # print(e) # elif f > d and f > e: # print(f) # else: # print(d) # for i in range(1, 101): # print(i, end=' ') # a = int(input()) # for i in range(1, a+1): # print(i, end=' ') # a = list(input()) # a.reverse() # for i in a: # print(i, end='') # a = int(input()) # for i in range(a+1): # print(i) # a = list(input().split()) # a.sort(reverse=True) # print(a[2]) # n = int(input()) # a = list(input().split()) # print(a[0], a[n//2], a[n-1]) # a, b = map(int, input().split()) # print(a ** b)

''' a = 74 b = a // 10 c = a % 10 b >>> 7 c >>> 4 p = 90 - 74 p = 16 // 5 p = 3 > 6 q = 90 - 75 q = 15 // 5 q = 3 >5 ''' # a, b = map(int, input().split()) # n = (89 - a) // 5 # n = b + n + 1 # print(n) # a, b, c = map(int, input().split()) # n = (89 - a) // 5 # n = b + n + 1 # # if n > c: # print('win') # # elif n == c: # print('same') # # else: # print('lose') # a, b, c = map(int, input().split()) # a = a - b + c # a = a % 10 # # if a == 0: # print('대박') # # else: # print('그럭저럭') # a, b = map(int, input().split()) # if a % 2 == 0: # print('짝수+', end='') # # if a % 2 == 1: # print('홀수+', end='') # # if b % 2 == 0: # print('짝수=', end='') # # if b % 2 == 1: # print('홀수=', end='') # # if (a + b) % 2 == 0: # print('짝수', end='') # # if (a + b) % 2 == 1: # print('홀수', end='')

# for i in range(50): # print('print', end ='') # for i in range(20): # print('hello', end='') # print(' ', end='') # for j in range(30): # print('world', end='') # a = input() # b = input() # c = input() # d = input() # print(a) # print(b) # print(c) # print(d) # a = input() # print(a) # a, b = map(int, input().split()) # print(a+b) # a, b = map(int, input().split()) # print(a, '+', b, '=', a + b) # print(a, '-', b, '=', a - b) # print(a, '*', b, '=', a * b) # print(a, '/', b, '=', a // b) # print(a, '%', b, '=', a % b) # a = int(input()) # print(a*123456789)

a, b = map(int, input().split()) for i in range(1, a+1): if a//i==0:

# a, b = map(int, input().split()) # x = a if a < b else b # # s = 0 # for i in range(1, x+1): # if a % i == 0 and b % i == 0: # s = i # # print(s) # # c = a // s # v = b // s # # print(c*v*s) a, b = map(int, input().split()) for i in range(1, ): print(a)

# t = int(input()) # a = 300 # b = 60 # c = 10 # if not t%10==0: # print('-1') # else : # print(t//a, (t%a)//b, ((t%a)%b)//c)

# a = int(input()) # b = 0 # if a <= 500: # b = a * 70 / 100 # elif 500 < a and a <= 1500: # b = 350 + (a - 500) * 40 / 100 # elif 1500 < a and a <= 4500: # b = 750 + (a - 1500) * 15 / 100 # elif 4500 < a and a <= 10000: # b = 1200 + (a - 4500) * 5 / 100 # else : # b = 1475 + (a - 10000) * 2 / 100 # print(int(b)) a = int(input()) if :

# a = int(input()) # b = 0 # if a <= 500: # b = a * 70 / 100 # elif 500 < a and a <= 1500: # b = 350 + (a - 500) * 40 / 100 # elif 1500 < a and a <= 4500: # b = 750 + (a - 1500) * 15 / 100 # elif 4500 < a and a <= 10000: # b = 1200 + (a - 4500) * 5 / 100 # else : # b = 1475 + (a - 10000) * 2 / 100 # print('%.0f' %b) # x = input() # s = 0 # for i in range(1, len(x)): # if x[i-1] == x[i]: # s += 5 # else : # s += 10 # print(s + 10) a = input() sum = 0 for i in range(len(a)): x, y = input().split() x = int(x) y = int(y) n = y % x sum += n print(sum)