problem_id
stringclasses
100 values
submission_id
stringlengths
10
10
status
stringclasses
2 values
code
stringlengths
6
806
p02554
s916721149
Wrong Answer
N=int(input()) if N<2: print(0) else: without=10**(N-2) considered=(without+2)*(without+1) considered=considered%(1000000007) print(considered)
p02554
s863853978
Wrong Answer
N=int(input()) if N<2: print(0) else: without=10*(N-2) considered=(without+2)*(without+1) considered=considered%(1000000007) print(considered)
p02554
s307141443
Wrong Answer
N = int(input()) output1 = (10 ** N) % 1000000007 output2 = (2 * (9 ** N)) % 1000000007 output3 = (8 ** N) % 1000000007 output = output1 - output2 + output3 ouput = output % 1000000007 print(output)
p02554
s410049959
Wrong Answer
def pow_k(x, n): if n == 0: return 1 K = 1 while n > 1: if n % 2 != 0: K = K * x x = x ** 2 n = (n - 1) // 2 else: x = x ** 2 n = n // 2 return K * x n = int(input()) ans = n*(n-1) ans *= pow_k(10,n-2) if n>2:ans -= n*(n-1)//2 print(ans%1000000007)
p02554
s121249534
Wrong Answer
n = int(input()) print(n*(n-1)*pow(9,n-2,10**9+7)%(10**9+7))
p02554
s056105167
Wrong Answer
n = int(input()) tmp = n res=1 ans=0 mod = 10**9+7 for i in range(1,n): res*=tmp tmp-=1 ans+=res ans%=mod print(ans)
p02554
s679673576
Wrong Answer
mod=1000000007 n=int(input()) print(0 if n==1 else pow(10,n,mod)-1)
p02554
s533394070
Wrong Answer
n=int(input()) if n==1: print(0) else: num=0 k=2 l=8**(n-1) for i in range(2,n+1): k*=2 l//=8 num+=(k-2)*l num%=(10**9+7) print(num%(10**9+7))
p02554
s348947922
Wrong Answer
n = int(input()) mod = 10**9 + 7 ans = pow(10,n,mod) ans -= pow(9,n,mod)*2 ans += pow(8,n,mod) print(ans)
p02554
s333370242
Wrong Answer
MOD = int(1e9+7) N = int(input()) answer = pow(10, N, MOD) answer -= pow(9, N, MOD) * 2 answer += pow(8, N, MOD) print(answer)
p02554
s666371009
Wrong Answer
n=int(input()) mod=10**9+7 print(pow(10,n,mod)-2*pow(9,n,mod)+pow(8,n,mod))
p02554
s661873401
Wrong Answer
import math MOD = 100000007 n = int(input()) ans = (10 ** (n - 2)) for i in range(n, 0, -1): ans *= i ans -= n * (n - 1) * (n - 2) * (n - 3) ans %= MOD print(ans)
p02554
s465889087
Wrong Answer
n=int(input()) if n==1: print(0) else: print((10**n-(8*10**(n-1))-2*(9**(n-1)))%(10**9+7))
p02554
s577282089
Wrong Answer
n = int(input()) a = 10**9 +7 b = pow(10,n,a) + pow(8,n,a) - 2 * pow(9,n,a) if b >= 0: print(b) else: print(b+a)
p02554
s748258848
Wrong Answer
n=int(input()) x=(10**n)%(10**9+7) y=(9**n)%(10**9+7) z=(8**n)%(10**9+7) print(x-2*y+z)
p02554
s311729880
Wrong Answer
#ABC178C N = int(input()) def Caculation(N): combination = 4 * (9**(N-2)) ans = combination % (10**9 + 7) print(ans) if N <= 1: print(0) else: Caculation(N)
p02554
s443292903
Wrong Answer
n=int(input()) c=10**9+7 def pow_c(x,n,c): if n == 0: return 1 K = 1 while n > 1: if n % 2 != 0: K= (K%c)*(x%c)%c x = ((x%c)**2)%c n //= 2 return (K%c) * (x%c) %c k10=pow_c(10,n,c) k9=pow_c(9,n,c) k8=pow_c(8,n,c) ans=(k10-2*k9+k8)%c
p02554
s864204247
Wrong Answer
N = int(input()) mod = 10**9+7 ans = pow(10, N, mod) - pow(9,N, mod)*2 + pow(8,N, mod) print(ans)
p02554
s392109987
Wrong Answer
mod=10**9 + 7 n=int(input()) print(pow(10,n,mod)-pow(8,n,mod))
p02554
s840812327
Wrong Answer
N = int(input()) MOD = 1e9+7 def powmod(x, y): res = 1 for p in range(y): res = res*x%MOD return res ans = powmod(10,N)-powmod(9,N)-powmod(9,N)+powmod(8,N) print(int(ans))
p02554
s214214632
Wrong Answer
N=int(input()) #Ai=0を含まない...9^N #Ai=9を含まない...9^N #Ai=0,Ai=9を含まない...8^N #全てで10^N通り #Ai=0,Ai=9の少なくとも一方が存在しない 9^N+9^N-8^N #答は10^N-9^N-9^N+8^N A=10**N B=9**N C=8**N A=A%(10**9+7) B=B%(10**9+7) C=C%(10**9+7) print(A-B*2+C)
p02554
s631733312
Wrong Answer
import sys N= int(input()) if N==1: print(0) sys.exit() if N>=2: a=10 b=9 c=8 for i in range(N-1): a=a*10%(10**9+7) b=b*9%(10**9+7) c=c*8%(10**9+7) print(int(a-2*b+c))
p02554
s887517913
Wrong Answer
import math def permutations_count(n, r): return math.factorial(n) // math.factorial(n - r) N = int(input()) if N < 2: print(0) exit() elif N == 2: print(2) exit() p = permutations_count(N, 2) ans = (p * (10 ** (N-2)) - p) % (10**9 + 7) print(ans)
p02554
s318758223
Wrong Answer
n = int(input()) if(n==1): print("0") exit() kekka = (pow(10,n-1)-2*pow(9,n-1))%1000000007 print(kekka)
p02554
s667298970
Wrong Answer
n=int(input()) mod=10**9+7 ans=0 ans=(2**n)%mod ans-=2 if n>2: ans2=(8**(n-2))%mod ans2*=n*(n-1) ans2%=mod ans+=ans2 print(ans%mod)
p02554
s771936813
Wrong Answer
import math n=int(input()) print((pow(2,n)-2)%1000000007)
p02554
s225980193
Wrong Answer
N = int(input()) MOD = 10**9+7 ans = 10**N%MOD - 9**N%MOD*2%MOD + 8**N%MOD print(ans)
p02554
s121961306
Wrong Answer
N = int(input()) MOD = 10 ** 9 + 7 ans = pow(10, N, MOD) ans -= pow(9, N, MOD) * 2 ans += pow(8, N, MOD) print(ans)
p02554
s945860457
Wrong Answer
N =input() N = int(N) x = 9 ** N y = 8 ** N z = 10 ** N - 2 * x + y print(z)
p02554
s040358084
Wrong Answer
n = int(input()) if n == 1: print(0) elif n == 2: print(2) else: x = (10 ** 9) + 7 a = (10 ** n) % x b = (9 ** n) % x c = (8 ** n) % x y = a - b * 2 + c if y < 0: y += x print(y)
p02554
s446386165
Wrong Answer
n = int(input()) mod = 10**9 + 7 ans = pow(10,n,mod) - pow(9,n,mod)*2 + pow(8,n,mod) print(ans)
p02554
s588461983
Wrong Answer
n = int(input()) if n == 2: print(2) else: if n < 2: print(0) else: dp = [0, 1, 1, 2] for i in range(3, n + 1): dp.append(dp[i]*i) print(dp[n+1]%(pow(10, 9) + 7))
p02554
s994808704
Wrong Answer
n=int(input()) p=1 q=1 r=1 for i in range(n): p=p*10 q=q*9 r=r*8 if p>=10**9+7: p=p%(10**9+7) if q>=10**9+7: q=q%(10**9+7) if r>=10**9+7: r=r%(10**9+7) an = p-2*q+r if an >=10**9+7: print(an%(10**9+7)) else: print(an)
p02554
s673660115
Wrong Answer
n=int(input()) mod=(1e+9)+7 x=1 if n>=2: ans=1 else: ans=0 for i in range(n): x*=10 ans*=8 ans%=mod x%=mod nin=1 for i in range(n): nin*=9 nin%=mod x+=ans x%=mod x-=(nin*2)%mod if x<0: x+=mod print(int(x%mod))
p02554
s175669449
Wrong Answer
mod =10**9 + 7 N=int(input()) a=10**(N-2) print(int((2*a)%mod))
p02554
s814638864
Wrong Answer
n = int( input() ) #print( n ) x = 1 y = 1 z = 1000000007 for i in range( n-1 ): x = ( x * 10 ) % z y = ( y * 8 ) % z ans = x - y print( ans )
p02554
s804956445
Wrong Answer
N = int(input()) a = 2*(10^N-9^N)-(10^N-8^N) ans = a % (10^9+7) print(ans)
p02554
s389895322
Wrong Answer
MOD = 10**9 + 7 import sys input = sys.stdin.readline N = int(input()) ans = pow(10,N,MOD) ans -= 2*pow(9,N,MOD) ans += pow(8,N,MOD) print(ans)
p02554
s754965389
Wrong Answer
n = int( input() ) #print( n ) x = 1 y = 1 z = 1000000007 for i in range( n-1 ): x = ( x * 10 ) % z y = ( y * 8 ) % z ans = x - y print( ans )
p02554
s586072030
Wrong Answer
n=int(input()) s=0 for i in range(n-1): p=10**i*9**(n-i-2) s+=p%1000000007 print(int(2*s))
p02554
s331728780
Wrong Answer
N = int(input()) print((10 ** N - 8 ** N) % (10 ** 9 + 7))
p02554
s889425797
Wrong Answer
# -*- using:utf-8 -*- def factorial_cor(n): fact = 1 for integer in range(1, n + 1): fact *= integer return fact if __name__ == "__main__": MOD = 1000000007 N = int(input()) if N == 1: print(0) elif N == 2: print(2) else: C = factorial_cor(N) ans = 10 ** (N - 2) * C % MOD print(int(ans))
p02554
s052078848
Wrong Answer
def bigmod(v, n10, m): """ >>> bigmod(1, 2, 9) 1 >>> bigmod(2343413, 10, 100005) 1 """ # print((v*10.**n10) % m) v %= m while n10>0: v *= 10 n10 -= 1 v %= m return v def main(): n = int(input()) m = int(10**9+7) a = bigmod(n*(n-1), n-2, m) print(a) main()
p02554
s682883058
Wrong Answer
def resolve(): MOD = 10 ** 9 + 7 N = int(input()) ans = pow(10, N, MOD) ans -= pow(9, N, MOD) ans -= pow(9, N, MOD) ans += pow(8, N, MOD) print(ans) if __name__ == "__main__": resolve()
p02554
s216495331
Wrong Answer
N = int(input()) res = N*(N-1)*(10**(N-2)) ress = res % ((10**9)+7) print(ress)
p02554
s494184112
Wrong Answer
N = int(input()) mod = 10**9 + 7 print(pow(10, N, mod) - 2*pow(9, N, mod) + pow(8, N, mod))
p02554
s630725122
Wrong Answer
N = int(input()) a = 1 b = 1 c = 1 for i in range(N): a = (a * 10) % (10**9 + 7) b = (b * 9) % (10**9 + 7) c = (c * 8) % (10**9 + 7) print(a + c - (2 * b) )
p02554
s891566780
Wrong Answer
n = int(input()) res = pow(10, n-2)*n*(n-1) print(res%1000000007)
p02554
s416581304
Wrong Answer
n = int(input()) mod = 10**9 + 7 if n == 1: print(0) exit() ans = pow(10,n,mod) - pow(9,n,mod)*2 + pow(8,n,mod) print(ans)
p02554
s251020461
Wrong Answer
N = int(input()) M = 7 + 10 ** 9 A = 0 def fac_mod(a, b): x = 1 for i in range(1, b+1): x = (x*a) % M return x A = fac_mod(10, N) - fac_mod(9, N) * 2 + fac_mod(8, N) % M if A < 0: A = M - A print(A)
p02554
s975692852
Wrong Answer
N = int(input()) mod = 10 ** 9 + 7 nn = 10 ** N%mod % mod nm = 2 * (9 ** N) % mod - (8 ** N) % mod print(nn - nm)
p02554
s875725229
Wrong Answer
n=int(input()) mod=1000000007 ten=1 nine=1 eight=1 for _ in range(n): nine *= 9 ten *= 10 eight *= 8 nine %= mod eight%=mod print(ten+eight-nine-nine)
p02554
s113132961
Wrong Answer
#!/usr/bin/env python3 import sys MOD = 1000000007 # type: int def solve(N: int): return print((10**N - 2*9**N + 8**N)) # Generated by 1.1.7.1 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 solve(N) if __name__ == '__main__': main()
p02554
s096024274
Wrong Answer
N = int(input()) mod = 10 ** 9 + 7 nn = 10 ** N % mod nm = 2 * (9 ** N) % mod - (8 ** N) % mod print(nn - nm)
p02554
s281441981
Wrong Answer
import math def use(a,n,x): if n==0: return 1 if n%2!=0: hold=use(a,n//2,x) return (a*hold*hold)%(x) else: hold=use(a,n//2,x) return (hold*hold)%(x) n=int(input()) if n<2: print(0) else: x=(10**9 +7) ans=use(10,n,x) s=2*use(9,n,x) y=use(8,n,x) print(int(ans+y-s))
p02554
s969496933
Wrong Answer
N = int(input()) mod = 10**9+7 ans = pow(10, N, mod) ans -= pow(9,N, mod)*2 ans += pow(8,N, mod) print(ans)
p02554
s869720671
Wrong Answer
N = int(input()) a = (10**N-8**N)%(10**9+7) print(a)
p02554
s043697776
Wrong Answer
N = int(input()) print(((N*(N-1))*(10**(N-2))-(6**(N-2)))%1000000007)
p02554
s474852033
Wrong Answer
n = int(input()) res = 0 mod = (10**9+7) from scipy.special import perm from scipy.special import comb # a = comb(n, r) a = perm(n,2) b = 10**(n-2) % mod res = int(((a * b) % mod)) # res = a + b - c print(res)
p02554
s570307673
Wrong Answer
from math import comb if __name__=="__main__": N=int(input()) if N<2: print(0) else: print(comb(N,2)%(10**9+7))
p02554
s250831522
Wrong Answer
import math N = int(input()) answer = 0 rest = 10 ** 9 + 7 def combinations_count(n, r): return math.factorial(n) // (math.factorial(n - r) * math.factorial(r)) if N == 1: answer = 0 else: answer = (combinations_count(N, 2) * 2) * math.factorial(N-2) print(answer % rest)
p02554
s293172208
Wrong Answer
n = int(input()) mod = 10 ** 9 + 7 print(pow(10, n, mod) - pow(9, n, mod) - pow(9, n, mod) + pow(8, n, mod))
p02554
s084518954
Wrong Answer
n=int(input()) m=1 s=1000000007 for i in range(1,n+1): if m<s: m=m*i else: m=(m%s)*i k=1 for i in range(1,n-1): if k<s: k=k*8 else: k=(k%s)*8 p=(m*k)%s print(p)
p02554
s735558186
Wrong Answer
n = int(input()) mod = 10**9+7 def pow(n, num): s = num for i in range(1,num): s += s*num%mod return s print((pow(n,10) - 2*pow(n,9) + pow(n,8))%mod)
p02554
s118996171
Wrong Answer
import itertools n = int(input()) a = ["0","9","x"] if n == 1: print(0) elif n == 2: print(2) else: count = 0 for v in itertools.product(a, repeat=n): l = list(v) if "0" in l and "9" in l and "x" in l: count += 9**l.count("x") print(count%(10**9+7))
p02554
s435271063
Wrong Answer
N = int(input()) MOD = 10**9 + 7 if N==1: print(0) elif N==2: print(2) else: ans = pow(10,N,MOD) - 2*pow(9,N,MOD) + pow(8,N,MOD) print(ans)
p02554
s267461608
Wrong Answer
n=int(input()) mod=int(1e9+7) if n==1: print(0) else: print(2*pow(10,n-2,mod)%mod)
p02554
s691906888
Wrong Answer
n = int(input()) mod = 10**9+7 ans = pow(10,n) ans += pow(9,n)*2 ans -= pow(8,n) print(ans%mod)
p02554
s520127208
Wrong Answer
import math n = int(input()) if n == 1: print(0) else: print(10**(n-2)*(math.factorial(n))%(10**9+7))
p02554
s183167582
Wrong Answer
p = 10 ** 9 + 7 N = int(input()) fact = [1, 1] factinv = [1, 1] inv = [0, 1] for i in range(2, N + 1): fact.append((fact[-1] * i) % p) inv.append((-inv[p % i] * (p // i)) % p) factinv.append((factinv[-1] * inv[-1]) % p) def cmb(n, r, p): if (r < 0) or (n < r): return 0 r = min(r, n - r) return fact[n] * factinv[r] * factinv[n-r] % p n = N r = 1 print(cmb(n, r, p))
p02554
s996171814
Wrong Answer
""" int(input()) map(int, input().split()) list(map(int, input().split())) input() input().split() """ n = int(input()) mod = 1000000007 tmp = (10**n)%mod diff = 2*(9**n)%mod eight = (8**n)%mod ans = tmp - diff + eight print(ans)
p02554
s465865567
Wrong Answer
x=int(input()) y=10^x- 9^x -9^x-8^x print(y)
p02554
s726475890
Wrong Answer
n = int(input()) if n <= 1: print(0) else: mod = 10 ** 9 + 7 print(pow(10, n, mod) - 2 * pow(9, n, mod) + pow(8, n, mod))
p02554
s351222152
Wrong Answer
n = int(input()) def pow(x, n): ans = 1 n_tmp = n while n: if n % 2: ans *= x ans %= mod x *= x n >>= 1 return ans mod = 10**9+7 #出力の制限 a = pow(8, n) # 0,9を含まない b = pow(9, n) # 0 or 9 のどちらかを含む c = pow(10, n) # 全て ans = c-2*b+a if ans < 0: ans += mod print(ans)
p02554
s813067401
Wrong Answer
from sys import stdin readline = stdin.buffer.readline read = stdin.buffer.read def i_input(): return int(input().rstrip()) def i_map(): return map(int, input().rstrip().split()) def i_list(): return list(i_map()) MOD = 10 ** 9 + 7 def main(): N = i_input() print(pow(10, N, MOD) - pow(9, N, MOD) * 2 + pow(8, N, MOD)) if __name__ == "__main__": main()
p02554
s025051730
Wrong Answer
import sys N = int(input()) if N == 1: print(0) sys.exit(0) if N == 2: print(1) sys.exit(0) # out = (N * (N - 1) * (10 ** (N - 2))) % ((10 ** 9) + 7) out = ((10 ** N) - ((9 ** N) * 2 - (8 ** N))) % ((10 ** 9) + 7) print(out)
p02554
s957356033
Wrong Answer
n = int(input()) def power_func(a,n,p): bi = str(format(n,"b"))#2進表現に res = 1 for i in range(len(bi)): res = (res*res) %p if bi[i] == "1": res = (res*a) %p return res if n == 1: print(0) else: mod = 10**9+7 print(power_func(10, n, mod)-(power_func(9, n, mod)*2-power_func(8, n, mod)))
p02554
s149040790
Wrong Answer
N = int(input()) a = (10**N*+8**N-2*(9**N))%((10**9)+7) print(a)
p02554
s500353853
Wrong Answer
n = int(input()) mod = 10**9+7 ans = pow(10,n,mod)-pow(9,n,mod)*2+pow(8,n,mod) print(ans)
p02554
s559814101
Wrong Answer
N = int(input()) m = 10**9 +7 result = pow(10,N,m) - 2*pow(9,N,m) + pow(8,N,m) print(result)
p02554
s776633852
Wrong Answer
N = int(input()) mod = 10**9+7 print(10**N%mod - 2*9**N%mod + 8**N%mod)
p02554
s466780672
Wrong Answer
N = int(input()) W = 0 V = 2 for i in range(1, N): W, V = 10 * W + V, 7 * V + 2 * 10 ** i print(W % (10 ** 9 + 7))
p02554
s568219197
Wrong Answer
N = int(input()) mod = 10**9 + 7 comb = N * (N - 1) // 2 comb0and9 = comb * 2 * (10**(N-2)) ans = comb0and9 % mod print(ans)
p02554
s288796013
Wrong Answer
N=int(input()) #標準入力 zero_nine=N*(N-1) #N個の中からどれを0と9に選出するか? other_numbers=10**(N-2) #0と9以外の要素の選び方は? if other_numbers<=1: answer=zero_nine else: answer = zero_nine*other_numbers warukazu=10**9+7 print(int(answer%warukazu))
p02554
s387048072
Wrong Answer
import math from operator import mul from functools import reduce def cmb(n,r): r = min(n-r,r) if r == 0: return 1 over = reduce(mul, range(n, n - r, -1)) under = reduce(mul, range(1,r + 1)) return over // under N = int(input()) answer = 0 rest = 10 ** 9 + 7 if N == 1: answer = 0 else: answer = cmb(N, 2) * 2 * (10 ** (N - 2)) print(answer % rest)
p02554
s035287166
Wrong Answer
n = int(input()) mod = 10**9 + 7 print((10**n % mod - (2*(9**n)) % mod + (8**n) % mod) )
p02554
s906797729
Wrong Answer
n = int(input()) if n == 1: print(0) if n == 2: print(2) else: print((10**n-(2*9**n-8**n))%(10**9+7))
p02554
s686593714
Wrong Answer
n = int(input()) print( ( (10 ** (n - 2) % (10 ** 9 + 7)) * ((n * (n-1) // 2) % (10 ** 9 + 7)) * 2) % (10 ** 9 + 7) )
p02554
s731508527
Wrong Answer
N=869121 if N<2: print(0) else: without=10**(N-2) considered=(without+2)*(without+1) considered=considered%(1000000007) print(considered)
p02554
s887699576
Wrong Answer
n = int(input()) MOD = 10 ** 9 + 7 print(pow(10, n, MOD) - 2 * pow(9, n, MOD) + pow(8, n, MOD))
p02554
s211269698
Wrong Answer
k = int(input()) if k < 2: print(0) else: num = 2*(k*2-3) num2 = num*10 - num # print(num2) waru = 10**9+7 # print(waru) print(num2 % waru)
p02554
s507546541
Wrong Answer
import sys N= int(input()) if N==1: print(0) sys.exit() if N>=2: a=10 b=9 c=8 for i in range(N-1): a=a*10%(10**9+7) b=b*9%(10**9+7) c=c*8%(10**9+7) print(a-2*b+c)
p02554
s303264298
Wrong Answer
n = int(raw_input()) mod = (10 ** 9 )+ 7 def f(a,n): mod = (10 ** 9 )+ 7 if n == 0: return 1 t = f(a,n/2) % mod return ((t ** 2) * (a if n%2 else 1)) %mod print (f(9,n) + f(9,n) - f(8,n)) %mod
p02554
s872251667
Wrong Answer
#import math import itertools n = int(input()) l = list(range(0, n, 1)) #print(l) def permutations_count(n, r): return math.factorial(n) // math.factorial(n - r) #print(len(list(itertools.permutations(l, 2)))) #%(10^9 + 7)した答えを出力 mas = n-2 # 0と9は必ず使う if mas == 0: print(2) elif n == 0: print(1) else: #res = (permutations_count(n, 2) * 10^mas)%(10^9 + 7) res = (len(list(itertools.permutations(l, 2)))%(10^9 + 7)) * (10^mas%(10^9 + 7)) print(res)
p02554
s196469840
Wrong Answer
def fact(n): ans = 1 for i in range(1, n+1): ans *= i return ans def comb(a, b): if a < b: a, b = b, a return fact(a)/(fact(a-b)*fact(b)) x = int(input()) a = comb(x, 2) b = 10*(x-2) print(a*b)
p02554
s945259505
Wrong Answer
n = int(input()) m = 10**9 + 7 if n==1: print(0) exit() s = 0 a = (8**(n-2))*10 a2 = (a//10)*8 sa = (4*a*5**(n-1))//(4**(n-1))-4*a sb = a2*(n-1) print((sa-sb)%m)
p02554
s352698005
Wrong Answer
n=int(input()) modd=1000000007 if(n==1): ans=1 elif n==2: ans=2 else: ans=(pow(10,n,modd)-pow(9,n,modd)*2+pow(8,n,modd))%modd print(ans)
p02554
s450522463
Wrong Answer
n=int(input()) a=1 b=1 for i in range(n): a*=10 a = a % (10**9 + 7) b*=8 b=b%(10**9+7) ans=(a-b)%(10**9+7) print(ans)
p02554
s270862304
Wrong Answer
import math N = int(input()) def permutations_count(n, r): return math.factorial(n) //( math.factorial(n - r) * math.factorial(r)) ans = 0 if N == 1: ans = 0 elif N == 2: ans = 2 else: for r in range(1,N,1): ans += permutations_count(N, r) % (10**9 + 7) print(ans)
p02554
s889849574
Wrong Answer
n = int(input()) mod = 10**9+7 ans = pow(10,n,mod) ans -= pow(9,n,mod) * 2 ans += pow(8,n,mod) print(ans)