Problem:


Pair of Primes

   We arrange the numbers between 1 and N (1 <= N <= 10000) in increasing
order and decreasing order like this:

1 2 3 4 5 6 7 8 9 . . . N
N . . . 9 8 7 6 5 4 3 2 1

Two numbers faced each other form a pair. Your task is to compute the number of pairs P such that both
numbers in the pairs are prime.

Input

Input contains several test cases. Each test case consists of an integer N in
one line.

Output

For each line of input, output P .

Sample Input

1
4
7
51

Output for the Sample Input

0
2
2
6



Sample input:
1
4
7
51


Sample output:
0
2
2
6

Submission status: Wrong Answer

Solution code:
import math
import bisect
primes=[2]
top=2
nlist=[2*x-1 for x in range(2,5000)]
while top<math.sqrt(10000):
    top=nlist[0]
    primes.append(top)
    newnlist=[]
    for i in nlist:
        if i%top!=0:
            newnlist.append(i)
    nlist=newnlist
primes=primes+nlist
while(1):
    try:
        n=int(raw_input())
    except:
        break
    if n%2==0:
        if n-1 in primes:
            print 2
        else:
            print 0
    else:
        ans=0
        center=(n+1)/2
        distc=[x-center for x in primes[:bisect.bisect(primes,n)-1]]
        if 0 in distc:
            ans=1
            il=bisect.bisect_left(distc,0)-1
            ir=bisect.bisect_left(distc,0)+1
        else:
            il=bisect.bisect_left(distc,0)-1
            ir=bisect.bisect_left(distc,0)
        while(il>=0 and ir<len(distc)):
            if distc[il]+distc[ir]==0:
                ans=ans+2
                il=il-1
                ir=ir+1
            elif distc[il]+distc[ir]<0:
                ir=ir+1
            else:
                il=il-1
        print ans

Submission status: Wrong Answer

Solution code:
import math
import bisect
primes=[2]
top=2
nlist=[2*x-1 for x in range(2,5000)]
while top<math.sqrt(10000):
    top=nlist[0]
    primes.append(top)
    newnlist=[]
    for i in nlist:
        if i%top!=0:
            newnlist.append(i)
    nlist=newnlist
primes=primes+nlist
while(1):
    try:
        n=int(raw_input())
    except:
        break
    if n%2==0:
        if n-1 in primes:
            print 2
        else:
            print 0
    else:
        ans=0
        center=(n+1)/2
        distc=[x-center for x in primes[:bisect.bisect(primes,n)]]
        print distc
        if 0 in distc:
            ans=1
            il=bisect.bisect_left(distc,0)-1
            ir=bisect.bisect_left(distc,0)+1
        else:
            il=bisect.bisect_left(distc,0)-1
            ir=bisect.bisect_left(distc,0)
        while(il>=0 and ir<len(distc)):
            if distc[il]+distc[ir]==0:
                ans=ans+2
                il=il-1
                ir=ir+1
            elif distc[il]+distc[ir]<0:
                ir=ir+1
            else:
                il=il-1
        print ans

Submission status: Wrong Answer

Solution code:
primes = [0, 0] + [1] * 9999
for i in range(2, 101):
    if primes[i]:
        for j in range(i*i, 10001, i):
            primes[j] = 0

while True:
    try:
        N = int(input())
    except:
        break
    print(sum(primes[i] & primes[-i] for i in range(1, N+1)))

Submission status: Wrong Answer

Solution code:
import math

def ifprime(num):
  if num == 1:
    return False
  for i in range(2,math.floor(num ** 0.5) + 1):
    if num % i:
      continue
    else:
      return False
  return True

while(True):
  try:
    num = int(input())
  except:
    break
  if num % 2 == 0:
    print(0)
    continue
  count = 0
  for i in range(1,num+1):
    if ifprime(i) and ifprime(num+1-i):
      count += 1
  print(count)

Submission status: Wrong Answer

Solution code:
import math

def ifprime(num):
  if num == 1:
    return False
  for i in range(2,math.floor(num ** 0.5) + 1):
    if num % i:
      continue
    else:
      return False
  return True

while(True):
  try:
    num = int(input())
  except:
    break
  if num % 2 == 0:
    print(0)
  else:
    count = 0
    for i in range(1,num+1):
      if ifprime(i) and ifprime(num+1-i):
        count += 1
    print(count)

Submission status: Wrong Answer

Solution code:
#-*- coding:utf-8 -*-
import sys

#入力されたデータに関して2つとも素数の組の数を返す
def both_prime(num):

    #素数リストの生成
    M = 10001
    primes = [1]*M
    primes[0], primes[1] = 0,0
    for i in range(2,101):
        if primes[i]:
            j = 2
            while j*i < M:
                primes[j*i] = 0
                j += 1

    #各データについて偶数奇数で場合分け
    #偶数
    if num%2 == 0:
        if primes[num-1]:
            return "2"
        else:
            return "0"
    elif num==3:
        return "1"
    #奇数
    else:
        c = 0 #カウント
        for i in range(num/2):
            if (i+1)%2==0:
                continue
            else:
                if primes[i+1] and primes[num-i]:
                    c += 1
        return c*2

if __name__=="__main__":
    lines = []
    for line in sys.stdin:
        print both_prime(int(line.replace("\n","")))

Submission status: Wrong Answer

Solution code:
#-*- coding:utf-8 -*-
import sys

#入力されたデータに関して2つとも素数の組の数を返す
def both_prime(num):

    #素数リストの生成
    M = 10001
    primes = [1]*M
    primes[0], primes[1] = 0,0
    for i in range(2,101):
        if primes[i]:
            j = 2
            while j*i < M:
                primes[j*i] = 0
                j += 1

    #各データについて偶数奇数で場合分け
    #偶数
    if num%2 == 0:
        if primes[num-1]:
            return "2"
        else:
            return "0"
    elif num==3:
        return "1"
    #奇数
    else:
        c = 0 #カウント
        for i in range(num/2):
            if (i+1)%2==0:
                continue
            else:
                if primes[i+1] and primes[num-i]:
                    c += 1
        return c*2

if __name__=="__main__":
    while 1:
        try:
            print both_prime(int(raw_input()))
        except EOFError:
            break

Submission status: Wrong Answer

Solution code:
#-*- coding:utf-8 -*-

#素数リストの生成
M = 10001
primes = [1]*M
primes[0], primes[1] = 0,0
for i in range(2,101):
    if primes[i]:
        j = 2
        while j*i < M:
            primes[j*i] = 0
            j += 1


#入力されたデータに関して2つとも素数の組の数を返す
def both_prime(num):

    #各データについて偶数奇数で場合分け
    #偶数
    if num%2 == 0:
        if primes[num-1]:
            return "2"
        else:
            return "0"
    elif num==3:
        return "1"
    #奇数
    else:
        c = 0 #カウント
        for i in range(num/2):
            if (i+1)%2==0:
                continue
            else:
                if primes[i+1] and primes[num-i]:
                    c += 1
        return c*2

if __name__=="__main__":
    while 1:
        try:
            n = int(raw_input())
            print both_prime(n)
        except EOFError:
            break

Submission status: Wrong Answer

Solution code:
import math
r = 10000
sqrt = int(math.sqrt(r))
p = [1 for i in range(r)]
p[0] = 0
for i in range(sqrt):
    if p[i]:
        p[2*i+1::i+1] = [0 for j in range(2*i+1,r,i+1)]
prime = []
for i in range(r):
    if p[i]:
        prime.append(i+1)

while True:
    try:
        n = int(raw_input())
        count = 0
        for i in prime:
            if i > n:
                break
            if p[i-1]*p[n-i-2] == 1:
                count += 1
        print count
    except:
        break

Submission status: Wrong Answer

Solution code:
import math
r = 9000
sqrt = int(math.sqrt(r))
p = [1 for i in range(r)]
p[0] = 0
for i in range(sqrt):
    if p[i]:
        p[2*i+1::i+1] = [0 for j in range(2*i+1,r,i+1)]
prime = []
for i in range(r):
    if p[i]:
        prime.append(i)

while True:
    try:
        n = int(raw_input())
        count = 0
        for i in prime:
            if i > n-1:
                break
            if p[i]*p[n-i-1] == 1:
                count += 1
        print count
    except:
        break

Submission status: Time Limit Exceeded

Solution code:
def prime_table(n):
    list = [True for _ in xrange(n + 1)]
    i = 2
    while i * i <= n:
        if list[i]:
            j = i + i
        while j <= n:
            list[j] = False
            j += i
        i += 1

    table = [i for i in xrange(n + 1) if list[i] and i >= 2]
    return table

table = prime_table(10000)
while True:
    try:
        n = int(raw_input())
    except EOFError:
        break
    
    l = [i for i in xrange(1,n+1)]
    r = l[::-1]
    ans = 0
    for j,k in zip(l,r):
        if j in table and k in table:
            ans += 1
    print ans

Submission status: Time Limit Exceeded

Solution code:
def prime_table(n):
    list = [True for _ in xrange(n + 1)]
    i = 2
    while i * i <= n:
        if list[i]:
            j = i + i
        while j <= n:
            list[j] = False
            j += i
        i += 1

    table = [i for i in xrange(n + 1) if list[i] and i >= 2]
    return table

table = prime_table(10000)
while True:
    try:
        n = int(raw_input())
    except EOFError:
        break
    
    l = (i for i in xrange(1,n+1))
    r = (i for i in xrange(n,0,-1))
    ans = 0
    for j,k in zip(l,r):
        if j in table and k in table:
            ans += 1
    print ans

Submission status: Time Limit Exceeded

Solution code:
import math
import bisect
primes=[2]
top=2
nlist=[2*x-1 for x in range(2,5000)]
while top<math.sqrt(10000):
    top=nlist[0]
    primes.append(top)
    newnlist=[]
    for i in nlist:
        if i%top!=0:
            newnlist.append(i)
    nlist=newnlist
primes=primes+nlist
while(1):
    try:
        n=int(raw_input())
    except:
        break
    if n%2==0:
        if n-1 in primes:
            print 2
        else:
            print 0
    else:
        ans=0
        center=(n+1)/2
        distc=[x-center for x in primes]
        if 0 in distc:
            ans=1
            il=bisect.bisect_left(distc,0)-1
            ir=bisect.bisect_left(distc,0)+1
        else:
            il=bisect.bisect_left(distc,0)-1
            ir=bisect.bisect_left(distc,0)
        while(il>=0 and ir<len(primes)):
            if primes[ir]<n+1:
                if distc[il]+distc[ir]==0:
                    ans=ans+2
                    il=il-1
                    ir=ir+1
                elif distc[il]+distc[ir]<0:
                    ir=ir+1
                else:
                    il=il-1
        print ans

Submission status: Time Limit Exceeded

Solution code:
class primes:
    primelist = [2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47]
    maxpval = 47
    

def addprime(num, p):
    maxval = p.maxpval
    while maxval < num:
        maxval += 1
        flag = False
        for prime in p.primelist:
            if maxval % prime == 0:
                flag = True
                break
        if flag == False:
            p.primelist.append(maxval)
            p.maxpval = maxval

def main():
    p = primes()
    # a = int(input())
    # addprime(a, p)
    # print(p.primelist)
    # print(p.maxpval)

    import sys
    l = []
    for line in sys.stdin:
        l.append(line)

    length = len(l)
    for i in range(length):
        count = 0
        width = int(l[i])
        number = int(l[i])
        addprime(width, p)

        if width % 2 == 0:
            width = width // 2
        else:
            width = (width // 2) + 1

        for j in range(width):
            if (j + 1) in p.primelist and (number - j) in p.primelist:
                count += 2
        print(count)


if __name__ == "__main__":
    main()

Submission status: Time Limit Exceeded

Solution code:
class primes:
    primelist = [2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 157, 163, 167,173, 179, 181, 191, 193, 197, 199, 211, 223, 227, 229, 233, 239, 241, 251, 257, 263, 269,271, 277, 281, 283, 293, 307, 311, 313, 317, 331, 337, 347, 349, 353, 359, 367, 373, 379,383, 389, 397, 401, 409, 419, 421, 431, 433, 439, 443, 449, 457, 461, 463, 467, 479, 487,491, 499, 503, 509, 521, 523, 541, 547, 557, 563, 569, 571, 577, 587, 593, 599, 601, 607,613, 617, 619, 631, 641, 643, 647, 653, 659, 661, 673, 677, 683, 691, 701, 709, 719, 727,733, 739, 743, 751, 757, 761, 769, 773, 787, 797, 809, 811, 821, 823, 827, 829, 839, 853,857, 859, 863, 877, 881, 883, 887, 907, 911, 919, 929, 937, 941, 947, 953, 967, 971]
    maxpval = 971
    

def addprime(num, p):
    maxval = p.maxpval
    while maxval < num:
        maxval += 1
        flag = False
        for prime in p.primelist:
            if maxval % prime == 0:
                flag = True
                break
        if flag == False:
            p.primelist.append(maxval)
            p.maxpval = maxval

def main():
    p = primes()
    # a = int(input())
    # addprime(a, p)
    # print(p.primelist)
    # print(p.maxpval)

    import sys
    l = []
    for line in sys.stdin:
        l.append(line)

    length = len(l)
    for i in range(length):
        count = 0
        width = int(l[i])
        number = int(l[i])
        addprime(width, p)

        if width % 2 == 0:
            width = width // 2
        else:
            width = (width // 2) + 1

        for j in range(width):
            if (j + 1) in p.primelist and (number - j) in p.primelist:
                count += 2
        print(count)


if __name__ == "__main__":
    main()

Submission status: Time Limit Exceeded

Solution code:
import sys
import math

primes = []
for n in range(2, 10001):
    is_prime = True
    for prime in primes:
        if prime > math.sqrt(n):
            break
        if n % prime == 0:
            is_prime = False
            break
    if is_prime:
        primes.append(n)


def __main__():
    ns = [[int(n) for n in line.strip().split()][0] for line in sys.stdin]
    p = 0
    for n in ns:
        pairs = [m for m in range(n, 0, -1) if n-m+1 in primes and m in primes]
        print(len(pairs))

if __name__ == "__main__":
    __main__()

Submission status: Time Limit Exceeded

Solution code:
import sys
import math

primes = []
for n in range(2, 10001):
    is_prime = True
    for prime in primes:
        if prime > math.sqrt(n):
            break
        if n % prime == 0:
            is_prime = False
            break
    if is_prime:
        primes.append(n)


def __main__():
    ns = [[int(n) for n in line.strip().split()][0] for line in sys.stdin]
    for n in ns:
        print(len([m for m in range(n//2, 0, -1) if n-m+1 in primes and m in primes])*2)

if __name__ == "__main__":
    __main__()

Submission status: Time Limit Exceeded

Solution code:
import sys


def is_prime(n, primes):
    for prime in primes:
        if prime ** 2 > n:
            return True
        if n % prime == 0:
            return False
    return True


def count_prime():
    primes = [2, 3]
    for i in range(5, 10001, 2):
        if is_prime(i, primes):
            primes.append(i)

    return primes

primes = count_prime()

for line in sys.stdin:
    n = int(line)
    count = 0

    for i in range(1, n+1):
        j = n - i + 1
        if i in primes and j in primes:
            count += 1

    print(count)

Submission status: Time Limit Exceeded

Solution code:
import sys
import math

# primes = []
# for n in range(2, 10001):
#     is_prime = True
#     for prime in primes:
#         if prime > math.sqrt(n):
#             break
#         if n % prime == 0:
#             is_prime = False
#             break
#     if is_prime:
#         primes.append(n)
primes = [2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199, 211, 223, 227, 229, 233, 239, 241, 251, 257, 263, 269, 271, 277, 281, 283, 293, 307, 311, 313, 317, 331, 337, 347, 349, 353, 359, 367, 373, 379, 383, 389, 397, 401, 409, 419, 421, 431, 433, 439, 443, 449, 457, 461, 463, 467, 479, 487, 491, 499, 503, 509, 521, 523, 541, 547, 557, 563, 569, 571, 577, 587, 593, 599, 601, 607, 613, 617, 619, 631, 641, 643, 647, 653, 659, 661, 673, 677, 683, 691, 701, 709, 719, 727, 733, 739, 743, 751, 757, 761, 769, 773, 787, 797, 809, 811, 821, 823, 827, 829, 839, 853, 857, 859, 863, 877, 881, 883, 887, 907, 911, 919, 929, 937, 941, 947, 953, 967, 971, 977, 983, 991, 997, 1009, 1013, 1019, 1021, 1031, 1033, 1039, 1049, 1051, 1061, 1063, 1069, 1087, 1091, 1093, 1097, 1103, 1109, 1117, 1123, 1129, 1151, 1153, 1163, 1171, 1181, 1187, 1193, 1201, 1213, 1217, 1223, 1229, 1231, 1237, 1249, 1259, 1277, 1279, 1283, 1289, 1291, 1297, 1301, 1303, 1307, 1319, 1321, 1327, 1361, 1367, 1373, 1381, 1399, 1409, 1423, 1427, 1429, 1433, 1439, 1447, 1451, 1453, 1459, 1471, 1481, 1483, 1487, 1489, 1493, 1499, 1511, 1523, 1531, 1543, 1549, 1553, 1559, 1567, 1571, 1579, 1583, 1597, 1601, 1607, 1609, 1613, 1619, 1621, 1627, 1637, 1657, 1663, 1667, 1669, 1693, 1697, 1699, 1709, 1721, 1723, 1733, 1741, 1747, 1753, 1759, 1777, 1783, 1787, 1789, 1801, 1811, 1823, 1831, 1847, 1861, 1867, 1871, 1873, 1877, 1879, 1889, 1901, 1907, 1913, 1931, 1933, 1949, 1951, 1973, 1979, 1987, 1993, 1997, 1999, 2003, 2011, 2017, 2027, 2029, 2039, 2053, 2063, 2069, 2081, 2083, 2087, 2089, 2099, 2111, 2113, 2129, 2131, 2137, 2141, 2143, 2153, 2161, 2179, 2203, 2207, 2213, 2221, 2237, 2239, 2243, 2251, 2267, 2269, 2273, 2281, 2287, 2293, 2297, 2309, 2311, 2333, 2339, 2341, 2347, 2351, 2357, 2371, 2377, 2381, 2383, 2389, 2393, 2399, 2411, 2417, 2423, 2437, 2441, 2447, 2459, 2467, 2473, 2477, 2503, 2521, 2531, 2539, 2543, 2549, 2551, 2557, 2579, 2591, 2593, 2609, 2617, 2621, 2633, 2647, 2657, 2659, 2663, 2671, 2677, 2683, 2687, 2689, 2693, 2699, 2707, 2711, 2713, 2719, 2729, 2731, 2741, 2749, 2753, 2767, 2777, 2789, 2791, 2797, 2801, 2803, 2819, 2833, 2837, 2843, 2851, 2857, 2861, 2879, 2887, 2897, 2903, 2909, 2917, 2927, 2939, 2953, 2957, 2963, 2969, 2971, 2999, 3001, 3011, 3019, 3023, 3037, 3041, 3049, 3061, 3067, 3079, 3083, 3089, 3109, 3119, 3121, 3137, 3163, 3167, 3169, 3181, 3187, 3191, 3203, 3209, 3217, 3221, 3229, 3251, 3253, 3257, 3259, 3271, 3299, 3301, 3307, 3313, 3319, 3323, 3329, 3331, 3343, 3347, 3359, 3361, 3371, 3373, 3389, 3391, 3407, 3413, 3433, 3449, 3457, 3461, 3463, 3467, 3469, 3491, 3499, 3511, 3517, 3527, 3529, 3533, 3539, 3541, 3547, 3557, 3559, 3571, 3581, 3583, 3593, 3607, 3613, 3617, 3623, 3631, 3637, 3643, 3659, 3671, 3673, 3677, 3691, 3697, 3701, 3709, 3719, 3727, 3733, 3739, 3761, 3767, 3769, 3779, 3793, 3797, 3803, 3821, 3823, 3833, 3847, 3851, 3853, 3863, 3877, 3881, 3889, 3907, 3911, 3917, 3919, 3923, 3929, 3931, 3943, 3947, 3967, 3989, 4001, 4003, 4007, 4013, 4019, 4021, 4027, 4049, 4051, 4057, 4073, 4079, 4091, 4093, 4099, 4111, 4127, 4129, 4133, 4139, 4153, 4157, 4159, 4177, 4201, 4211, 4217, 4219, 4229, 4231, 4241, 4243, 4253, 4259, 4261, 4271, 4273, 4283, 4289, 4297, 4327, 4337, 4339, 4349, 4357, 4363, 4373, 4391, 4397, 4409, 4421, 4423, 4441, 4447, 4451, 4457, 4463, 4481, 4483, 4493, 4507, 4513, 4517, 4519, 4523, 4547, 4549, 4561, 4567, 4583, 4591, 4597, 4603, 4621, 4637, 4639, 4643, 4649, 4651, 4657,
          4663, 4673, 4679, 4691, 4703, 4721, 4723, 4729, 4733, 4751, 4759, 4783, 4787, 4789, 4793, 4799, 4801, 4813, 4817, 4831, 4861, 4871, 4877, 4889, 4903, 4909, 4919, 4931, 4933, 4937, 4943, 4951, 4957, 4967, 4969, 4973, 4987, 4993, 4999, 5003, 5009, 5011, 5021, 5023, 5039, 5051, 5059, 5077, 5081, 5087, 5099, 5101, 5107, 5113, 5119, 5147, 5153, 5167, 5171, 5179, 5189, 5197, 5209, 5227, 5231, 5233, 5237, 5261, 5273, 5279, 5281, 5297, 5303, 5309, 5323, 5333, 5347, 5351, 5381, 5387, 5393, 5399, 5407, 5413, 5417, 5419, 5431, 5437, 5441, 5443, 5449, 5471, 5477, 5479, 5483, 5501, 5503, 5507, 5519, 5521, 5527, 5531, 5557, 5563, 5569, 5573, 5581, 5591, 5623, 5639, 5641, 5647, 5651, 5653, 5657, 5659, 5669, 5683, 5689, 5693, 5701, 5711, 5717, 5737, 5741, 5743, 5749, 5779, 5783, 5791, 5801, 5807, 5813, 5821, 5827, 5839, 5843, 5849, 5851, 5857, 5861, 5867, 5869, 5879, 5881, 5897, 5903, 5923, 5927, 5939, 5953, 5981, 5987, 6007, 6011, 6029, 6037, 6043, 6047, 6053, 6067, 6073, 6079, 6089, 6091, 6101, 6113, 6121, 6131, 6133, 6143, 6151, 6163, 6173, 6197, 6199, 6203, 6211, 6217, 6221, 6229, 6247, 6257, 6263, 6269, 6271, 6277, 6287, 6299, 6301, 6311, 6317, 6323, 6329, 6337, 6343, 6353, 6359, 6361, 6367, 6373, 6379, 6389, 6397, 6421, 6427, 6449, 6451, 6469, 6473, 6481, 6491, 6521, 6529, 6547, 6551, 6553, 6563, 6569, 6571, 6577, 6581, 6599, 6607, 6619, 6637, 6653, 6659, 6661, 6673, 6679, 6689, 6691, 6701, 6703, 6709, 6719, 6733, 6737, 6761, 6763, 6779, 6781, 6791, 6793, 6803, 6823, 6827, 6829, 6833, 6841, 6857, 6863, 6869, 6871, 6883, 6899, 6907, 6911, 6917, 6947, 6949, 6959, 6961, 6967, 6971, 6977, 6983, 6991, 6997, 7001, 7013, 7019, 7027, 7039, 7043, 7057, 7069, 7079, 7103, 7109, 7121, 7127, 7129, 7151, 7159, 7177, 7187, 7193, 7207, 7211, 7213, 7219, 7229, 7237, 7243, 7247, 7253, 7283, 7297, 7307, 7309, 7321, 7331, 7333, 7349, 7351, 7369, 7393, 7411, 7417, 7433, 7451, 7457, 7459, 7477, 7481, 7487, 7489, 7499, 7507, 7517, 7523, 7529, 7537, 7541, 7547, 7549, 7559, 7561, 7573, 7577, 7583, 7589, 7591, 7603, 7607, 7621, 7639, 7643, 7649, 7669, 7673, 7681, 7687, 7691, 7699, 7703, 7717, 7723, 7727, 7741, 7753, 7757, 7759, 7789, 7793, 7817, 7823, 7829, 7841, 7853, 7867, 7873, 7877, 7879, 7883, 7901, 7907, 7919, 7927, 7933, 7937, 7949, 7951, 7963, 7993, 8009, 8011, 8017, 8039, 8053, 8059, 8069, 8081, 8087, 8089, 8093, 8101, 8111, 8117, 8123, 8147, 8161, 8167, 8171, 8179, 8191, 8209, 8219, 8221, 8231, 8233, 8237, 8243, 8263, 8269, 8273, 8287, 8291, 8293, 8297, 8311, 8317, 8329, 8353, 8363, 8369, 8377, 8387, 8389, 8419, 8423, 8429, 8431, 8443, 8447, 8461, 8467, 8501, 8513, 8521, 8527, 8537, 8539, 8543, 8563, 8573, 8581, 8597, 8599, 8609, 8623, 8627, 8629, 8641, 8647, 8663, 8669, 8677, 8681, 8689, 8693, 8699, 8707, 8713, 8719, 8731, 8737, 8741, 8747, 8753, 8761, 8779, 8783, 8803, 8807, 8819, 8821, 8831, 8837, 8839, 8849, 8861, 8863, 8867, 8887, 8893, 8923, 8929, 8933, 8941, 8951, 8963, 8969, 8971, 8999, 9001, 9007, 9011, 9013, 9029, 9041, 9043, 9049, 9059, 9067, 9091, 9103, 9109, 9127, 9133, 9137, 9151, 9157, 9161, 9173, 9181, 9187, 9199, 9203, 9209, 9221, 9227, 9239, 9241, 9257, 9277, 9281, 9283, 9293, 9311, 9319, 9323, 9337, 9341, 9343, 9349, 9371, 9377, 9391, 9397, 9403, 9413, 9419, 9421, 9431, 9433, 9437, 9439, 9461, 9463, 9467, 9473, 9479, 9491, 9497, 9511, 9521, 9533, 9539, 9547, 9551, 9587, 9601, 9613, 9619, 9623, 9629, 9631, 9643, 9649, 9661, 9677, 9679, 9689, 9697, 9719, 9721, 9733, 9739, 9743, 9749, 9767, 9769, 9781, 9787, 9791, 9803, 9811, 9817, 9829, 9833, 9839, 9851, 9857, 9859, 9871, 9883, 9887, 9901, 9907, 9923, 9929, 9931, 9941, 9949, 9967, 9973]

def __main__():
    ns = [[int(n) for n in line.strip().split()][0] for line in sys.stdin]
    for n in ns:
        print(len([m for m in range(n // 2, 0, -1) if n -
                   m + 1 in primes and m in primes]) * 2)

if __name__ == "__main__":
    __main__()

Submission status: Time Limit Exceeded

Solution code:
import fileinput

for line in fileinput.input():
    n = int(line)
    sqn = n ** 0.5
    ps = set()
    for i in range(3, n + 1, 2):
        for p in ps:
            if p > sqn:
                continue
            if i % p == 0:
                break
        else:
            ps.add(i)
        i += 2
    ps.add(2)

    print(sum(i in ps and (n + 1 - i) in ps for i in range(2, n + 1)))

Submission status: Time Limit Exceeded

Solution code:
ans = []
def mark(s, x):
    for i in xrange(x + x, len(s), x):
        s[i] = False

def sieve(n):
    s = [True] * n
    for x in xrange(2, int(n**0.5) + 1):
        if s[x]: mark(s, x)
    return [i for i in xrange(0,n) if s[i] and i > 1]
primes = sieve(10000)

while True:
    count = 0
    try:
        N = input()
    except EOFError:
        break
    for i in range(1,N+1):
        if i in primes:
            j = N - i + 1
            if j in primes:
                count += 1

    ans.append(count)

for i in ans:
    print i

Submission status: Time Limit Exceeded

Solution code:
#-*- coding:utf-8 -*-
import sys

#入力されたデータに関して2つとも素数の組の数を返す
def both_prime(num):

    #素数リスト
    primes = [2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199, 211, 223, 227, 229, 233, 239, 241, 251, 257, 263, 269, 271, 277, 281, 283, 293, 307, 311, 313, 317, 331, 337, 347, 349, 353, 359, 367, 373, 379, 383, 389, 397, 401, 409, 419, 421, 431, 433, 439, 443, 449, 457, 461, 463, 467, 479, 487, 491, 499, 503, 509, 521, 523, 541, 547, 557, 563, 569, 571, 577, 587, 593, 599, 601, 607, 613, 617, 619, 631, 641, 643, 647, 653, 659, 661, 673, 677, 683, 691, 701, 709, 719, 727, 733, 739, 743, 751, 757, 761, 769, 773, 787, 797, 809, 811, 821, 823, 827, 829, 839, 853, 857, 859, 863, 877, 881, 883, 887, 907, 911, 919, 929, 937, 941, 947, 953, 967, 971, 977, 983, 991, 997, 1009, 1013, 1019, 1021, 1031, 1033, 1039, 1049, 1051, 1061, 1063, 1069, 1087, 1091, 1093, 1097, 1103, 1109, 1117, 1123, 1129, 1151, 1153, 1163, 1171, 1181, 1187, 1193, 1201, 1213, 1217, 1223, 1229, 1231, 1237, 1249, 1259, 1277, 1279, 1283, 1289, 1291, 1297, 1301, 1303, 1307, 1319, 1321, 1327, 1361, 1367, 1373, 1381, 1399, 1409, 1423, 1427, 1429, 1433, 1439, 1447, 1451, 1453, 1459, 1471, 1481, 1483, 1487, 1489, 1493, 1499, 1511, 1523, 1531, 1543, 1549, 1553, 1559, 1567, 1571, 1579, 1583, 1597, 1601, 1607, 1609, 1613, 1619, 1621, 1627, 1637, 1657, 1663, 1667, 1669, 1693, 1697, 1699, 1709, 1721, 1723, 1733, 1741, 1747, 1753, 1759, 1777, 1783, 1787, 1789, 1801, 1811, 1823, 1831, 1847, 1861, 1867, 1871, 1873, 1877, 1879, 1889, 1901, 1907, 1913, 1931, 1933, 1949, 1951, 1973, 1979, 1987, 1993, 1997, 1999, 2003, 2011, 2017, 2027, 2029, 2039, 2053, 2063, 2069, 2081, 2083, 2087, 2089, 2099, 2111, 2113, 2129, 2131, 2137, 2141, 2143, 2153, 2161, 2179, 2203, 2207, 2213, 2221, 2237, 2239, 2243, 2251, 2267, 2269, 2273, 2281, 2287, 2293, 2297, 2309, 2311, 2333, 2339, 2341, 2347, 2351, 2357, 2371, 2377, 2381, 2383, 2389, 2393, 2399, 2411, 2417, 2423, 2437, 2441, 2447, 2459, 2467, 2473, 2477, 2503, 2521, 2531, 2539, 2543, 2549, 2551, 2557, 2579, 2591, 2593, 2609, 2617, 2621, 2633, 2647, 2657, 2659, 2663, 2671, 2677, 2683, 2687, 2689, 2693, 2699, 2707, 2711, 2713, 2719, 2729, 2731, 2741, 2749, 2753, 2767, 2777, 2789, 2791, 2797, 2801, 2803, 2819, 2833, 2837, 2843, 2851, 2857, 2861, 2879, 2887, 2897, 2903, 2909, 2917, 2927, 2939, 2953, 2957, 2963, 2969, 2971, 2999, 3001, 3011, 3019, 3023, 3037, 3041, 3049, 3061, 3067, 3079, 3083, 3089, 3109, 3119, 3121, 3137, 3163, 3167, 3169, 3181, 3187, 3191, 3203, 3209, 3217, 3221, 3229, 3251, 3253, 3257, 3259, 3271, 3299, 3301, 3307, 3313, 3319, 3323, 3329, 3331, 3343, 3347, 3359, 3361, 3371, 3373, 3389, 3391, 3407, 3413, 3433, 3449, 3457, 3461, 3463, 3467, 3469, 3491, 3499, 3511, 3517, 3527, 3529, 3533, 3539, 3541, 3547, 3557, 3559, 3571, 3581, 3583, 3593, 3607, 3613, 3617, 3623, 3631, 3637, 3643, 3659, 3671, 3673, 3677, 3691, 3697, 3701, 3709, 3719, 3727, 3733, 3739, 3761, 3767, 3769, 3779, 3793, 3797, 3803, 3821, 3823, 3833, 3847, 3851, 3853, 3863, 3877, 3881, 3889, 3907, 3911, 3917, 3919, 3923, 3929, 3931, 3943, 3947, 3967, 3989, 4001, 4003, 4007, 4013, 4019, 4021, 4027, 4049, 4051, 4057, 4073, 4079, 4091, 4093, 4099, 4111, 4127, 4129, 4133, 4139, 4153, 4157, 4159, 4177, 4201, 4211, 4217, 4219, 4229, 4231, 4241, 4243, 4253, 4259, 4261, 4271, 4273, 4283, 4289, 4297, 4327, 4337, 4339, 4349, 4357, 4363, 4373, 4391, 4397, 4409, 4421, 4423, 4441, 4447, 4451, 4457, 4463, 4481, 4483, 4493, 4507, 4513, 4517, 4519, 4523, 4547, 4549, 4561, 4567, 4583, 4591, 4597, 4603, 4621, 4637, 4639, 4643, 4649, 4651, 4657, 4663, 4673, 4679, 4691, 4703, 4721, 4723, 4729, 4733, 4751, 4759, 4783, 4787, 4789, 4793, 4799, 4801, 4813, 4817, 4831, 4861, 4871, 4877, 4889, 4903, 4909, 4919, 4931, 4933, 4937, 4943, 4951, 4957, 4967, 4969, 4973, 4987, 4993, 4999, 5003, 5009, 5011, 5021, 5023, 5039, 5051, 5059, 5077, 5081, 5087, 5099, 5101, 5107, 5113, 5119, 5147, 5153, 5167, 5171, 5179, 5189, 5197, 5209, 5227, 5231, 5233, 5237, 5261, 5273, 5279, 5281, 5297, 5303, 5309, 5323, 5333, 5347, 5351, 5381, 5387, 5393, 5399, 5407, 5413, 5417, 5419, 5431, 5437, 5441, 5443, 5449, 5471, 5477, 5479, 5483, 5501, 5503, 5507, 5519, 5521, 5527, 5531, 5557, 5563, 5569, 5573, 5581, 5591, 5623, 5639, 5641, 5647, 5651, 5653, 5657, 5659, 5669, 5683, 5689, 5693, 5701, 5711, 5717, 5737, 5741, 5743, 5749, 5779, 5783, 5791, 5801, 5807, 5813, 5821, 5827, 5839, 5843, 5849, 5851, 5857, 5861, 5867, 5869, 5879, 5881, 5897, 5903, 5923, 5927, 5939, 5953, 5981, 5987, 6007, 6011, 6029, 6037, 6043, 6047, 6053, 6067, 6073, 6079, 6089, 6091, 6101, 6113, 6121, 6131, 6133, 6143, 6151, 6163, 6173, 6197, 6199, 6203, 6211, 6217, 6221, 6229, 6247, 6257, 6263, 6269, 6271, 6277, 6287, 6299, 6301, 6311, 6317, 6323, 6329, 6337, 6343, 6353, 6359, 6361, 6367, 6373, 6379, 6389, 6397, 6421, 6427, 6449, 6451, 6469, 6473, 6481, 6491, 6521, 6529, 6547, 6551, 6553, 6563, 6569, 6571, 6577, 6581, 6599, 6607, 6619, 6637, 6653, 6659, 6661, 6673, 6679, 6689, 6691, 6701, 6703, 6709, 6719, 6733, 6737, 6761, 6763, 6779, 6781, 6791, 6793, 6803, 6823, 6827, 6829, 6833, 6841, 6857, 6863, 6869, 6871, 6883, 6899, 6907, 6911, 6917, 6947, 6949, 6959, 6961, 6967, 6971, 6977, 6983, 6991, 6997, 7001, 7013, 7019, 7027, 7039, 7043, 7057, 7069, 7079, 7103, 7109, 7121, 7127, 7129, 7151, 7159, 7177, 7187, 7193, 7207, 7211, 7213, 7219, 7229, 7237, 7243, 7247, 7253, 7283, 7297, 7307, 7309, 7321, 7331, 7333, 7349, 7351, 7369, 7393, 7411, 7417, 7433, 7451, 7457, 7459, 7477, 7481, 7487, 7489, 7499, 7507, 7517, 7523, 7529, 7537, 7541, 7547, 7549, 7559, 7561, 7573, 7577, 7583, 7589, 7591, 7603, 7607, 7621, 7639, 7643, 7649, 7669, 7673, 7681, 7687, 7691, 7699, 7703, 7717, 7723, 7727, 7741, 7753, 7757, 7759, 7789, 7793, 7817, 7823, 7829, 7841, 7853, 7867, 7873, 7877, 7879, 7883, 7901, 7907, 7919, 7927, 7933, 7937, 7949, 7951, 7963, 7993, 8009, 8011, 8017, 8039, 8053, 8059, 8069, 8081, 8087, 8089, 8093, 8101, 8111, 8117, 8123, 8147, 8161, 8167, 8171, 8179, 8191, 8209, 8219, 8221, 8231, 8233, 8237, 8243, 8263, 8269, 8273, 8287, 8291, 8293, 8297, 8311, 8317, 8329, 8353, 8363, 8369, 8377, 8387, 8389, 8419, 8423, 8429, 8431, 8443, 8447, 8461, 8467, 8501, 8513, 8521, 8527, 8537, 8539, 8543, 8563, 8573, 8581, 8597, 8599, 8609, 8623, 8627, 8629, 8641, 8647, 8663, 8669, 8677, 8681, 8689, 8693, 8699, 8707, 8713, 8719, 8731, 8737, 8741, 8747, 8753, 8761, 8779, 8783, 8803, 8807, 8819, 8821, 8831, 8837, 8839, 8849, 8861, 8863, 8867, 8887, 8893, 8923, 8929, 8933, 8941, 8951, 8963, 8969, 8971, 8999, 9001, 9007, 9011, 9013, 9029, 9041, 9043, 9049, 9059, 9067, 9091, 9103, 9109, 9127, 9133, 9137, 9151, 9157, 9161, 9173, 9181, 9187, 9199, 9203, 9209, 9221, 9227, 9239, 9241, 9257, 9277, 9281, 9283, 9293, 9311, 9319, 9323, 9337, 9341, 9343, 9349, 9371, 9377, 9391, 9397, 9403, 9413, 9419, 9421, 9431, 9433, 9437, 9439, 9461, 9463, 9467, 9473, 9479, 9491, 9497, 9511, 9521, 9533, 9539, 9547, 9551, 9587, 9601, 9613, 9619, 9623, 9629, 9631, 9643, 9649, 9661, 9677, 9679, 9689, 9697, 9719, 9721, 9733, 9739, 9743, 9749, 9767, 9769, 9781, 9787, 9791, 9803, 9811, 9817, 9829, 9833, 9839, 9851, 9857, 9859, 9871, 9883, 9887, 9901, 9907, 9923, 9929, 9931, 9941, 9949, 9967, 9973]

    #各データについて偶数奇数で場合分け
    #偶数
    if num%2 == 0:
        if num-1 in primes:
            return "2"
        else:
            return "0"
    #奇数
    else:
        c = 0 #カウント
        for i in range(num):
            if (i+1)%2==0:
                continue
            else:
                if (i+1) in primes and (num-i) in primes:
                    c += 1
        return c

if __name__=="__main__":
    lines = []
    for line in sys.stdin:
        print both_prime(int(line.replace("\n","")))