結果
| 問題 |
No.3291 K-step Navigation
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2025-10-03 22:48:12 |
| 言語 | PyPy3 (7.3.15) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 2,121 bytes |
| コンパイル時間 | 399 ms |
| コンパイル使用メモリ | 82,780 KB |
| 実行使用メモリ | 109,112 KB |
| 最終ジャッジ日時 | 2025-10-03 22:48:21 |
| 合計ジャッジ時間 | 7,992 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge1 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 2 |
| other | AC * 42 WA * 8 |
ソースコード
# input
import sys
input = sys.stdin.readline
II = lambda : int(input())
MI = lambda : map(int, input().split())
LI = lambda : [int(a) for a in input().split()]
SI = lambda : input().rstrip()
LLI = lambda n : [[int(a) for a in input().split()] for _ in range(n)]
LSI = lambda n : [input().rstrip() for _ in range(n)]
MI_1 = lambda : map(lambda x:int(x)-1, input().split())
LI_1 = lambda : [int(a)-1 for a in input().split()]
mod = 998244353
inf = 10 ** 18 + 10
ordalp = lambda s : ord(s)-65 if s.isupper() else ord(s)-97
ordallalp = lambda s : ord(s)-39 if s.isupper() else ord(s)-97
yes = lambda : print("Yes")
no = lambda : print("No")
yn = lambda flag : print("Yes" if flag else "No")
prinf = lambda ans : print(ans if ans < 1000001001001001001 else -1)
alplow = "abcdefghijklmnopqrstuvwxyz"
alpup = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
alpall = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
URDL = {'U':(-1,0), 'R':(0,1), 'D':(1,0), 'L':(0,-1)}
DIR_4 = [[-1,0],[0,1],[1,0],[0,-1]]
DIR_8 = [[-1,0],[-1,1],[0,1],[1,1],[1,0],[1,-1],[0,-1],[-1,-1]]
DIR_BISHOP = [[-1,1],[1,1],[1,-1],[-1,-1]]
prime60 = [2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59]
sys.set_int_max_str_digits(0)
# sys.setrecursionlimit(10**6)
# import pypyjit
# pypyjit.set_param('max_unroll_recursion=-1')
from collections import defaultdict,deque
from heapq import heappop,heappush
from bisect import bisect_left,bisect_right
DD = defaultdict
BSL = bisect_left
BSR = bisect_right
n, m, k, s, t = MI()
s -= 1
t -= 1
e = [[0] * n for i in range(n)]
for i in range(m):
u, v = MI_1()
e[u][v] = 1
e[v][u] = 1
d = [[[inf, inf] for i in range(2)] for i in range(n)]
d[s][0][0] = 0
que = deque([(s, 0, 0)])
while que:
u, f, p = que.popleft()
nd = d[u][f][p] + 1
for v in range(n):
if u == v: continue
if e[u][v]:
if d[v][f^1][p] == inf:
d[v][f^1][p] = nd
que.append((v, f^1, p))
elif p == 0:
if d[v][f^1][p+1] == inf:
d[v][f^1][p+1] = nd
que.append((v, f^1, p+1))
yn(d[t][k&1][0] <= k or d[t][k&1][1] <= k)