import sys
input = sys.stdin.readline
n = int(input())
s = tuple(map(lambda x: ord(x) - ord("a") + 1, input()))
base = 1007
mod = 2**61 - 1

length = n//2
b = [1] * (length + 1)
shash = [0] * (length+1)
for i in range(1, length + 1):
    b[i] = b[i-1] * base % mod
    shash[i] = (shash[i - 1] * base + s[i - 1]) % mod

for ans in reversed(range(1, length+1)):
    # calc hash
    hash_ = 0
    check = {}
    #y = set([])
    for left in range(n - ans + 1):
        if left == 0:
            hash_ = shash[ans]
            check[hash_] = left
            #y.add(hash_)
        else:
            hash_ = base * hash_ - b[ans] * s[left - 1] + s[left + ans - 1]
            hash_ %= mod
            if hash_ in check.keys():
                # print("tmp = ", tmp)
                if check[hash_] <= left - ans:
                    print(ans)
                    # a = check[hash_][tmp-1]
                    # at = "".join(map(lambda x: chr(x + ord("a")), s[a:a+ans]))
                    # for j in range(ans):
                        # if s[a+j] != s[left+j]:
                            # print("Fail")
                            # exit()
                    # print("Success")
                    sys.exit()
            else:
                check[hash_] = left
                #y.add(hash_)
        # print(hash_, s[left:left+ans])
print(0)
 import sys sys input = sys.stdin.readline input sys.stdin.readline sys.stdin sys stdin readline n = int(input()) n int(input()) int input() input s = tuple(map(lambda x: ord(x) - ord("a") + 1, input())) s tuple(map(lambda x: ord(x) - ord("a") + 1, input())) tuple map(lambda x: ord(x) - ord("a") + 1, input()) map lambda x: ord(x) - ord("a") + 1 ord(x) - ord("a") + 1 ord(x) - ord("a") ord(x) ord x ord("a") ord "a" 1 x input() input base = 1007 base 1007 mod = 2**61 - 1 mod 2**61 - 1 2**61 2 61 1 length = n//2 length n//2 n 2 b = [1] * (length + 1) b [1] * (length + 1) [1] 1 length + 1 length 1 shash = [0] * (length+1) shash [0] * (length+1) [0] 0 length+1 length 1 for i in range(1, length + 1):
    b[i] = b[i-1] * base % mod
    shash[i] = (shash[i - 1] * base + s[i - 1]) % mod i range(1, length + 1) range 1 length + 1 length 1 b[i] = b[i-1] * base % mod b[i] b i b[i-1] * base % mod b[i-1] * base b[i-1] b i-1 i 1 base mod shash[i] = (shash[i - 1] * base + s[i - 1]) % mod shash[i] shash i (shash[i - 1] * base + s[i - 1]) % mod shash[i - 1] * base + s[i - 1] shash[i - 1] * base shash[i - 1] shash i - 1 i 1 base s[i - 1] s i - 1 i 1 mod for ans in reversed(range(1, length+1)):
    # calc hash
    hash_ = 0
    check = {}
    #y = set([])
    for left in range(n - ans + 1):
        if left == 0:
            hash_ = shash[ans]
            check[hash_] = left
            #y.add(hash_)
        else:
            hash_ = base * hash_ - b[ans] * s[left - 1] + s[left + ans - 1]
            hash_ %= mod
            if hash_ in check.keys():
                # print("tmp = ", tmp)
                if check[hash_] <= left - ans:
                    print(ans)
                    # a = check[hash_][tmp-1]
                    # at = "".join(map(lambda x: chr(x + ord("a")), s[a:a+ans]))
                    # for j in range(ans):
                        # if s[a+j] != s[left+j]:
                            # print("Fail")
                            # exit()
                    # print("Success")
                    sys.exit()
            else:
                check[hash_] = left
                #y.add(hash_)
        # print(hash_, s[left:left+ans]) ans reversed(range(1, length+1)) reversed range(1, length+1) range 1 length+1 length 1 hash_ = 0 hash_ 0 check = {} check {} for left in range(n - ans + 1):
        if left == 0:
            hash_ = shash[ans]
            check[hash_] = left
            #y.add(hash_)
        else:
            hash_ = base * hash_ - b[ans] * s[left - 1] + s[left + ans - 1]
            hash_ %= mod
            if hash_ in check.keys():
                # print("tmp = ", tmp)
                if check[hash_] <= left - ans:
                    print(ans)
                    # a = check[hash_][tmp-1]
                    # at = "".join(map(lambda x: chr(x + ord("a")), s[a:a+ans]))
                    # for j in range(ans):
                        # if s[a+j] != s[left+j]:
                            # print("Fail")
                            # exit()
                    # print("Success")
                    sys.exit()
            else:
                check[hash_] = left
                #y.add(hash_)
        # print(hash_, s[left:left+ans]) left range(n - ans + 1) range n - ans + 1 n - ans n ans 1 if left == 0:
            hash_ = shash[ans]
            check[hash_] = left
            #y.add(hash_)
        else:
            hash_ = base * hash_ - b[ans] * s[left - 1] + s[left + ans - 1]
            hash_ %= mod
            if hash_ in check.keys():
                # print("tmp = ", tmp)
                if check[hash_] <= left - ans:
                    print(ans)
                    # a = check[hash_][tmp-1]
                    # at = "".join(map(lambda x: chr(x + ord("a")), s[a:a+ans]))
                    # for j in range(ans):
                        # if s[a+j] != s[left+j]:
                            # print("Fail")
                            # exit()
                    # print("Success")
                    sys.exit()
            else:
                check[hash_] = left
                #y.add(hash_)
        # print(hash_, s[left:left+ans]) left == 0 left 0 hash_ = shash[ans] hash_ shash[ans] shash ans check[hash_] = left check[hash_] check hash_ left hash_ = base * hash_ - b[ans] * s[left - 1] + s[left + ans - 1] hash_ base * hash_ - b[ans] * s[left - 1] + s[left + ans - 1] base * hash_ - b[ans] * s[left - 1] base * hash_ base hash_ b[ans] * s[left - 1] b[ans] b ans s[left - 1] s left - 1 left 1 s[left + ans - 1] s left + ans - 1 left + ans left ans 1 hash_ %= mod hash_ mod if hash_ in check.keys():
                # print("tmp = ", tmp)
                if check[hash_] <= left - ans:
                    print(ans)
                    # a = check[hash_][tmp-1]
                    # at = "".join(map(lambda x: chr(x + ord("a")), s[a:a+ans]))
                    # for j in range(ans):
                        # if s[a+j] != s[left+j]:
                            # print("Fail")
                            # exit()
                    # print("Success")
                    sys.exit()
            else:
                check[hash_] = left
                #y.add(hash_)
        # print(hash_, s[left:left+ans]) hash_ in check.keys() hash_ check.keys() check.keys check keys if check[hash_] <= left - ans:
                    print(ans)
                    # a = check[hash_][tmp-1]
                    # at = "".join(map(lambda x: chr(x + ord("a")), s[a:a+ans]))
                    # for j in range(ans):
                        # if s[a+j] != s[left+j]:
                            # print("Fail")
                            # exit()
                    # print("Success")
                    sys.exit()
             check[hash_] <= left - ans check[hash_] check hash_ left - ans left ans print(ans) print ans sys.exit() sys.exit sys exit check[hash_] = left check[hash_] check hash_ left print(0) print 0 hash_ = base * hash_ - b[ans] * s[left - 1] + s[left + ans - 1] base * hash_ - b[ans] * s[left - 1] + s[left + ans - 1] hash_ input = sys.stdin.readline sys.stdin.readline input hash_ %= mod mod hash_ hash_ = shash[ans] shash[ans] hash_ mod = 2**61 - 1 2**61 - 1 mod shash = [0] * (length+1) [0] * (length+1) shash s = tuple(map(lambda x: ord(x) - ord("a") + 1, input())) tuple(map(lambda x: ord(x) - ord("a") + 1, input())) s length = n//2 n//2 length b = [1] * (length + 1) [1] * (length + 1) b hash_ = 0 0 hash_ check = {} {} check n = int(input()) int(input()) n base = 1007 1007 base
import sys
input = sys.stdin.readline
n = int(input())
s = tuple(map(lambda x: ord(x) - ord("a") + 1, input()))
base = 1007
mod = 2**61 - 1

length = n//2
b = [1] * (length + 1)
shash = [0] * (length+1)
for i in range(1, length + 1):
    b[i] = b[i-1] * base % mod
    shash[i] = (shash[i - 1] * base + s[i - 1]) % mod

for ans in reversed(range(1, length+1)):
    # calc hash
    hash_ = 0
    check = {}
    #y = set([])
    for left in range(n - ans + 1):
        if left == 0:
            hash_ = shash[ans]
            check[hash_] = left
            #y.add(hash_)
        else:
            hash_ = base * hash_ - b[ans] * s[left - 1] + s[left + ans - 1]
            hash_ %= mod
            if hash_ in check.keys():
                # print("tmp = ", tmp)
                if check[hash_] <= left - ans:
                    print(ans)
                    # a = check[hash_][tmp-1]
                    # at = "".join(map(lambda x: chr(x + ord("a")), s[a:a+ans]))
                    # for j in range(ans):
                        # if s[a+j] != s[left+j]:
                            # print("Fail")
                            # exit()
                    # print("Success")
                    sys.exit()
            else:
                check[hash_] = left
                #y.add(hash_)
        # print(hash_, s[left:left+ans])
print(0)

