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 242 ms
コンパイル使用メモリ 82,440 KB
実行使用メモリ 77,248 KB
最終ジャッジ日時 2024-10-14 07:30:17
合計ジャッジ時間 5,415 ms
ジャッジサーバーID
(参考情報)
judge3 / judge2
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
61,860 KB
testcase_01 AC 50 ms
62,804 KB
testcase_02 AC 50 ms
62,276 KB
testcase_03 AC 59 ms
66,212 KB
testcase_04 WA -
testcase_05 WA -
testcase_06 WA -
testcase_07 AC 49 ms
61,636 KB
testcase_08 WA -
testcase_09 WA -
testcase_10 AC 48 ms
61,788 KB
testcase_11 WA -
testcase_12 WA -
testcase_13 AC 50 ms
61,560 KB
testcase_14 AC 49 ms
62,296 KB
testcase_15 WA -
testcase_16 AC 50 ms
61,952 KB
testcase_17 AC 49 ms
62,140 KB
testcase_18 AC 49 ms
61,732 KB
testcase_19 AC 137 ms
76,956 KB
testcase_20 AC 138 ms
76,488 KB
testcase_21 WA -
testcase_22 WA -
testcase_23 WA -
testcase_24 AC 51 ms
62,664 KB
testcase_25 AC 49 ms
63,424 KB
testcase_26 AC 50 ms
62,716 KB
testcase_27 WA -
testcase_28 WA -
testcase_29 AC 137 ms
76,552 KB
testcase_30 WA -
testcase_31 WA -
testcase_32 WA -
testcase_33 AC 51 ms
62,348 KB
testcase_34 AC 48 ms
61,600 KB
testcase_35 WA -
testcase_36 WA -
testcase_37 AC 49 ms
62,348 KB
testcase_38 AC 50 ms
62,100 KB
testcase_39 AC 49 ms
61,424 KB
testcase_40 AC 71 ms
68,380 KB
testcase_41 AC 88 ms
72,072 KB
testcase_42 AC 63 ms
67,196 KB
testcase_43 AC 139 ms
76,816 KB
testcase_44 AC 138 ms
76,508 KB
testcase_45 AC 138 ms
76,800 KB
testcase_46 AC 140 ms
76,628 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