結果

問題 No.1657 Sum is Prime (Easy Version)
ユーザー McGregorshMcGregorsh
提出日時 2022-07-24 09:18:22
言語 PyPy3
(7.3.15)
結果
AC  
実行時間 391 ms / 2,000 ms
コード長 3,628 bytes
コンパイル時間 339 ms
コンパイル使用メモリ 87,116 KB
実行使用メモリ 116,264 KB
最終ジャッジ日時 2023-09-20 06:37:43
合計ジャッジ時間 10,866 ms
ジャッジサーバーID
（参考情報） 		judge13 / judge11
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テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 368 ms
115,960 KB
testcase_01 AC 368 ms
115,956 KB
testcase_02 AC 374 ms
116,016 KB
testcase_03 AC 363 ms
115,988 KB
testcase_04 AC 372 ms
115,796 KB
testcase_05 AC 372 ms
115,912 KB
testcase_06 AC 363 ms
116,264 KB
testcase_07 AC 363 ms
116,016 KB
testcase_08 AC 371 ms
115,936 KB
testcase_09 AC 371 ms
116,008 KB
testcase_10 AC 377 ms
116,040 KB
testcase_11 AC 369 ms
116,084 KB
testcase_12 AC 379 ms
115,924 KB
testcase_13 AC 375 ms
116,168 KB
testcase_14 AC 370 ms
116,084 KB
testcase_15 AC 373 ms
116,100 KB
testcase_16 AC 376 ms
115,984 KB
testcase_17 AC 365 ms
116,056 KB
testcase_18 AC 372 ms
116,000 KB
testcase_19 AC 382 ms
115,968 KB
testcase_20 AC 379 ms
116,260 KB
testcase_21 AC 391 ms
115,996 KB
testcase_22 AC 367 ms
115,860 KB
testcase_23 AC 379 ms
116,012 KB
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ソースコード

diff # 

###N以下の素数列挙###

import math 
def sieve_of_eratosthenes(n):
	  prime = [True for i in range(n+1)]
	  prime[0] = False
	  prime[1] = False
	  
	  sqrt_n = math.ceil(math.sqrt(n))
	  for i in range(2, sqrt_n+1):
	  	  if prime[i]:
	  	  	  for j in range(2*i, n+1, i):
	  	  	  	  prime[j] = False
	  return prime


###N以上K以下の素数列挙###

import math

def segment_sieve(a, b):
	  sqrt_b = math.ceil(math.sqrt(b))
	  prime_small = [True for i in range(sqrt_b)]
	  prime = [True for i in range(b-a+1)]
	  
	  for i in range(2, sqrt_b):
	  	  if prime_small[i]:
	  	  	  for j in range(2*i, sqrt_b, i):
	  	  	  	  prime_small[j] = False
	  	  	  for j in range((a+i-1)//i*i, b+1, i):
	  	  	  	  #print('j: ', j)
	  	  	  	  prime[j-a] = False
	  return prime


###n進数から10進数変換###

def base_10(num_n,n):
	  num_10 = 0
	  for s in str(num_n):
	  	  num_10 *= n
	  	  num_10 += int(s)
	  return num_10


###10進数からn進数変換###

def base_n(num_10,n):
	  str_n = ''
	  while num_10:
	  	  if num_10%n>=10:
	  	  	  return -1
	  	  str_n += str(num_10%n)
	  	  num_10 //= n
	  return int(str_n[::-1])


###複数の数の最大公約数、最小公倍数###

from functools import reduce

# 最大公約数
def gcd_list(num_list: list) -> int:
	  return reduce(gcd, num_list)

# 最小公倍数
def lcm_base(x: int, y: int) -> int:
	  return (x * y) // gcd(x, y)
def lcm_list(num_list: list):
	  return reduce(lcm_base, num_list, 1)


###約数列挙###

def make_divisors(n):
	  lower_divisors, upper_divisors = [], []
	  i = 1
	  while i * i <= n:
	  	  if n % i == 0:
	  	  	  lower_divisors.append(i)
	  	  	  if i != n // i:
	  	  	  	  upper_divisors.append(n//i)
	  	  i += 1
	  return lower_divisors + upper_divisors[::-1]


###順列###

def nPr(n, r):
	  npr = 1
	  for i in range(n, n-r, -1):
	  	  npr *= i
	  return npr


###組合せ###

def nCr(n, r):
	  factr = 1
	  r = min(r, n - r)
	  for i in range(r, 1, -1):
	  	  factr *= i
	  return nPr(n, r)/factr



import sys, re
from fractions import Fraction
from math import ceil, floor, sqrt, pi, factorial, gcd
from copy import deepcopy
from collections import Counter, deque, defaultdict
from heapq import heapify, heappop, heappush
from itertools import accumulate, product, combinations, combinations_with_replacement, permutations
from bisect import bisect, bisect_left, bisect_right
from functools import reduce
from decimal import Decimal, getcontext
def i_input(): return int(input())
def i_map(): return map(int, input().split())
def i_list(): return list(i_map())
def i_row(N): return [i_input() for _ in range(N)]
def i_row_list(N): return [i_list() for _ in range(N)]
def s_input(): return input()
def s_map(): return input().split()
def s_list(): return list(s_map())
def s_row(N): return [s_input for _ in range(N)]
def s_row_str(N): return [s_list() for _ in range(N)]
def s_row_list(N): return [list(s_input()) for _ in range(N)]
def lcm(a, b): return a * b // gcd(a, b)
def get_distance(x1, y1, x2, y2):
	  d = sqrt((x2 - x1) ** 2 + (y2 - y1) ** 2)
	  return d
def rotate(table):
   	  n_fild = []
   	  for x in zip(*table[::-1]):
   	  	  n_fild.append(x)
   	  return n_fild
sys.setrecursionlimit(10 ** 7)
INF = float('inf')
MOD = 10 ** 9 + 7
MOD2 = 998244353


###関数コピーしたか？###
def main():
   
   l, r = i_map()
   
   nums = sieve_of_eratosthenes(3 * (10 ** 6))
   
   cou = 0
   for i in range(l, r+1):
   	  if nums[i]:
   	  	  cou += 1
   	  if i + 1 > r:
   	        continue
   	  if nums[i+(i+1)]:
   	  	  cou += 1
   print(cou)
   
if __name__ == '__main__':
    main()
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