結果

問題 No.1885 Flat Permutation
ユーザー U SU S
提出日時 2022-03-25 23:20:21
言語 PyPy3
(7.3.15)
結果
WA  
実行時間 -
コード長 2,012 bytes
コンパイル時間 344 ms
コンパイル使用メモリ 82,176 KB
実行使用メモリ 76,928 KB
最終ジャッジ日時 2024-04-22 08:16:31
合計ジャッジ時間 5,476 ms
ジャッジサーバーID
(参考情報)
judge3 / judge5
このコードへのチャレンジ
(要ログイン)

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 51 ms
61,056 KB
testcase_01 AC 52 ms
61,440 KB
testcase_02 AC 51 ms
61,056 KB
testcase_03 AC 59 ms
65,280 KB
testcase_04 WA -
testcase_05 WA -
testcase_06 WA -
testcase_07 AC 51 ms
61,312 KB
testcase_08 WA -
testcase_09 WA -
testcase_10 AC 50 ms
61,056 KB
testcase_11 WA -
testcase_12 WA -
testcase_13 AC 50 ms
60,800 KB
testcase_14 AC 50 ms
60,928 KB
testcase_15 WA -
testcase_16 AC 51 ms
61,056 KB
testcase_17 AC 50 ms
60,800 KB
testcase_18 AC 51 ms
60,928 KB
testcase_19 AC 135 ms
76,544 KB
testcase_20 AC 136 ms
76,544 KB
testcase_21 WA -
testcase_22 WA -
testcase_23 WA -
testcase_24 AC 51 ms
61,184 KB
testcase_25 AC 50 ms
60,928 KB
testcase_26 AC 50 ms
61,056 KB
testcase_27 WA -
testcase_28 WA -
testcase_29 AC 137 ms
76,416 KB
testcase_30 WA -
testcase_31 WA -
testcase_32 WA -
testcase_33 AC 50 ms
60,928 KB
testcase_34 AC 50 ms
60,672 KB
testcase_35 WA -
testcase_36 WA -
testcase_37 AC 50 ms
61,056 KB
testcase_38 AC 51 ms
61,056 KB
testcase_39 AC 50 ms
61,056 KB
testcase_40 AC 71 ms
68,096 KB
testcase_41 AC 91 ms
71,936 KB
testcase_42 AC 64 ms
66,304 KB
testcase_43 AC 139 ms
76,512 KB
testcase_44 AC 138 ms
76,288 KB
testcase_45 AC 139 ms
76,520 KB
testcase_46 AC 142 ms
76,288 KB
権限があれば一括ダウンロードができます

ソースコード

diff #

# import sys
# input = sys.stdin.readline
# import pypyjit
# pypyjit.set_param('max_unroll_recursion=-1')
def mp():return map(int,input().split())
def lmp():return list(map(int,input().split()))
def mps(A):return [tuple(map(int, input().split())) for _ in range(A)]
def stoi(LIST):return list(map(int,LIST))
def itos(LIST):return list(map(str,LIST))
def bitA(X,A):return X & 1<<A == 1<<A
import math
import bisect
import heapq
import time
from copy import copy as cc
from copy import deepcopy as dc
from itertools import accumulate, product
from collections import Counter, defaultdict, deque
def ceil(U,V):return (U+V-1)//V
def modf1(N,MOD):return (N-1)%MOD+1
inf = int(1e18+20)
mod = 998244353

n,x,y = mp()
if x > y:x,y = y,x
if x != 1 and y != n:
    if y-x == 1:
        print(0)
    else:
        step = y - 1 - (x+1) - 3
        jump = 1
        ans = 1
        now = 1
        while step >= 0:
            bunsi = (step+1) * (step+2)* (step+3)
            bunbo = jump * (step+jump+1)*(step+jump+2)
            now *= bunsi*pow(bunbo,mod-2,mod)
            now %= mod
            ans += now
            ans %= mod
            step -= 3
            jump += 1
        print(ans % mod)

elif x == 1:
    if y-x == 1:
        print(0)
        exit()
    step = y-1-3
    jump = 1
    ans = 1
    now = 1
    while step >= 0:
        bunsi = (step + 1) * (step + 2) * (step + 3)
        bunbo = jump * (step + jump + 1) * (step + jump + 2)
        now *= bunsi * pow(bunbo, mod - 2, mod)
        now %= mod
        ans += now
        ans %= mod
        step -= 3
        jump += 1
    print(ans % mod)
else:
    if y-x == 1:
        print(0)
        exit()
    step = n-x-3
    jump = 1
    ans = 1
    now = 1
    while step >= 0:
        bunsi = (step + 1) * (step + 2) * (step + 3)
        bunbo = jump * (step + jump + 1) * (step + jump + 2)
        now *= bunsi * pow(bunbo, mod - 2, mod)
        now %= mod
        ans += now
        ans %= mod
        step -= 3
        jump += 1
    print(ans % mod)

0