結果
問題 | No.1414 東大文系数学2021第2問改 |
ユーザー | vwxyz |
提出日時 | 2024-05-03 15:40:11 |
言語 | PyPy3 (7.3.15) |
結果 |
AC
|
実行時間 | 697 ms / 2,000 ms |
コード長 | 3,055 bytes |
コンパイル時間 | 336 ms |
コンパイル使用メモリ | 82,848 KB |
実行使用メモリ | 254,912 KB |
最終ジャッジ日時 | 2024-05-03 15:40:36 |
合計ジャッジ時間 | 19,469 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge5 |
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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 | 649 ms
254,500 KB |
testcase_01 | AC | 625 ms
254,588 KB |
testcase_02 | AC | 661 ms
254,632 KB |
testcase_03 | AC | 619 ms
254,636 KB |
testcase_04 | AC | 638 ms
254,380 KB |
testcase_05 | AC | 619 ms
254,524 KB |
testcase_06 | AC | 644 ms
254,912 KB |
testcase_07 | AC | 615 ms
254,740 KB |
testcase_08 | AC | 644 ms
254,580 KB |
testcase_09 | AC | 621 ms
254,440 KB |
testcase_10 | AC | 648 ms
253,944 KB |
testcase_11 | AC | 621 ms
254,468 KB |
testcase_12 | AC | 645 ms
254,408 KB |
testcase_13 | AC | 621 ms
254,480 KB |
testcase_14 | AC | 697 ms
254,640 KB |
testcase_15 | AC | 624 ms
254,084 KB |
testcase_16 | AC | 641 ms
254,848 KB |
testcase_17 | AC | 616 ms
254,400 KB |
testcase_18 | AC | 619 ms
253,900 KB |
testcase_19 | AC | 694 ms
254,588 KB |
testcase_20 | AC | 697 ms
254,204 KB |
testcase_21 | AC | 622 ms
254,504 KB |
testcase_22 | AC | 620 ms
254,308 KB |
testcase_23 | AC | 651 ms
254,468 KB |
testcase_24 | AC | 619 ms
254,464 KB |
testcase_25 | AC | 658 ms
254,316 KB |
testcase_26 | AC | 620 ms
254,432 KB |
ソースコード
import bisect import copy import decimal import fractions import functools import heapq import itertools import math import random import sys from collections import Counter,deque,defaultdict from functools import lru_cache,reduce from heapq import heappush,heappop,heapify,heappushpop,_heappop_max,_heapify_max def _heappush_max(heap,item): heap.append(item) heapq._siftdown_max(heap, 0, len(heap)-1) def _heappushpop_max(heap, item): if heap and item < heap[0]: item, heap[0] = heap[0], item heapq._siftup_max(heap, 0) return item from math import degrees, gcd as GCD read=sys.stdin.read readline=sys.stdin.readline readlines=sys.stdin.readlines def Extended_Euclid(n,m): stack=[] while m: stack.append((n,m)) n,m=m,n%m if n>=0: x,y=1,0 else: x,y=-1,0 for i in range(len(stack)-1,-1,-1): n,m=stack[i] x,y=y,x-(n//m)*y return x,y class MOD: def __init__(self,p,e=1): self.p=p self.e=e self.mod=self.p**self.e def Pow(self,a,n): a%=self.mod if n>=0: return pow(a,n,self.mod) else: assert math.gcd(a,self.mod)==1 x=Extended_Euclid(a,self.mod)[0] return pow(x,-n,self.mod) def Build_Fact(self,N): assert N>=0 self.factorial=[1] self.cnt=[0]*(N+1) for i in range(1,N+1): ii=i self.cnt[i]=self.cnt[i-1] while ii%self.p==0: ii//=self.p self.cnt[i]+=1 self.factorial.append((self.factorial[-1]*ii)%self.mod) self.factorial_inve=[None]*(N+1) self.factorial_inve[-1]=self.Pow(self.factorial[-1],-1) for i in range(N-1,-1,-1): ii=i+1 while ii%self.p==0: ii//=self.p self.factorial_inve[i]=(self.factorial_inve[i+1]*ii)%self.mod def Fact(self,N): return self.factorial[N]*pow(self.p,self.cnt[N],self.mod)%self.mod def Fact_Inve(self,N): if self.cnt[N]: return None return self.factorial_inve[N] def Comb(self,N,K,divisible_count=False): if K<0 or K>N: return 0 retu=self.factorial[N]*self.factorial_inve[K]*self.factorial_inve[N-K]%self.mod cnt=self.cnt[N]-self.cnt[N-K]-self.cnt[K] if divisible_count: return retu,cnt else: retu*=pow(self.p,cnt,self.mod) retu%=self.mod return retu N,M,K=map(int,readline().split()) mod=998244353 fact=[1] for i in range(1,10000001): fact.append(fact[-1]*i%mod) fact_inve=[1]*10000001 fact_inve[10000000]=759799589 for i in range(9999999,0,-1): fact_inve[i]=fact_inve[i+1]*(i+1)%mod def Comb(a,b): if a<b or b<0: return 0 return fact[a]*fact_inve[b]%mod*fact_inve[a-b]%mod ans=0 for i in range(1,min(M//K,N-M+1)+1): if i%2==1: ans+=Comb(N-i*K,N-M)*Comb(N-M+1,i) else: ans-=Comb(N-i*K,N-M)*Comb(N-M+1,i) ans%=mod print(ans)