結果
問題 | No.8063 幅優先探索 |
ユーザー | tomoyaatcoder |
提出日時 | 2020-05-10 17:06:08 |
言語 | PyPy3 (7.3.15) |
結果 |
RE
|
実行時間 | - |
コード長 | 4,897 bytes |
コンパイル時間 | 138 ms |
コンパイル使用メモリ | 82,432 KB |
実行使用メモリ | 89,984 KB |
最終ジャッジ日時 | 2024-07-07 22:15:50 |
合計ジャッジ時間 | 2,434 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge3 |
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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 | RE | - |
testcase_01 | RE | - |
testcase_02 | RE | - |
testcase_03 | RE | - |
testcase_04 | RE | - |
testcase_05 | RE | - |
testcase_06 | RE | - |
testcase_07 | RE | - |
testcase_08 | RE | - |
testcase_09 | RE | - |
testcase_10 | RE | - |
ソースコード
import sys import heapq import re from itertools import permutations from bisect import bisect_left, bisect_right from collections import Counter, deque from fractions import gcd from math import factorial, sqrt, ceil from functools import lru_cache, reduce INF = 1 << 60 MOD = 1000000007 sys.setrecursionlimit(10 ** 7) # UnionFind class UnionFind(): def __init__(self, n): self.n = n self.parents = [-1] * n def find(self, x): if self.parents[x] < 0: return x else: self.parents[x] = self.find(self.parents[x]) return self.parents[x] def union(self, x, y): x = self.find(x) y = self.find(y) if x == y: return if self.parents[x] > self.parents[y]: x, y = y, x self.parents[x] += self.parents[y] self.parents[y] = x def size(self, x): return -self.parents[self.find(x)] def same(self, x, y): return self.find(x) == self.find(y) def members(self, x): root = self.find(x) return [i for i in range(self.n) if self.find(i) == root] def roots(self): return [i for i, x in enumerate(self.parents) if x < 0] def group_count(self): return len(self.roots()) def all_group_members(self): return {r: self.members(r) for r in self.roots()} def __str__(self): return '\n'.join('{}: {}'.format(r, self.members(r)) for r in self.roots()) def is_prime(n): if n == 1: return False for i in range(2,int(n**0.5)+1): if n % i == 0: return False return True # ワーシャルフロイド (任意の2頂点の対に対して最短経路を求める) # 計算量n^3 (nは頂点の数) def warshall_floyd(d, n): #d[i][j]: iからjへの最短距離 for k in range(n): for i in range(n): for j in range(n): d[i][j] = min(d[i][j],d[i][k] + d[k][j]) return d # ダイクストラ def dijkstra_heap(s, edge, n): #始点sから各頂点への最短距離 d = [10**20] * n used = [True] * n #True:未確定 d[s] = 0 used[s] = False edgelist = [] for a,b in edge[s]: heapq.heappush(edgelist,a*(10**6)+b) while len(edgelist): minedge = heapq.heappop(edgelist) #まだ使われてない頂点の中から最小の距離のものを探す if not used[minedge%(10**6)]: continue v = minedge%(10**6) d[v] = minedge//(10**6) used[v] = False for e in edge[v]: if used[e[1]]: heapq.heappush(edgelist,(e[0]+d[v])*(10**6)+e[1]) return d # 素因数分解 def factorization(n): arr = [] temp = n for i in range(2, int(-(-n**0.5//1))+1): if temp%i==0: cnt=0 while temp%i==0: cnt+=1 temp //= i arr.append([i, cnt]) if temp!=1: arr.append([temp, 1]) if arr==[]: arr.append([n, 1]) return arr # 2数の最小公倍数 def lcm(x, y): return (x * y) // gcd(x, y) # リストの要素の最小公倍数 def lcm_list(numbers): return reduce(lcm, numbers, 1) # リストの要素の最大公約数 def gcd_list(numbers): return reduce(gcd, numbers) # 素数判定 # limit以下の素数を列挙 def eratosthenes(limit): A = [i for i in range(2, limit+1)] P = [] while True: prime = min(A) if prime > sqrt(limit): break P.append(prime) i = 0 while i < len(A): if A[i] % prime == 0: A.pop(i) continue i += 1 for a in A: P.append(a) return P # 同じものを含む順列 def permutation_with_duplicates(L): if L == []: return [[]] else: ret = [] # set(集合)型で重複を削除、ソート S = sorted(set(L)) for i in S: data = L[:] data.remove(i) for j in permutation_with_duplicates(data): ret.append([i] + j) return ret # ここから書き始める r, c = map(int, input().split()) sy, sx = map(int, input().split()) sy -= 1 sx -= 1 gy, gx = map(int, input().split()) gy -= 1 gx -= 1 grid = [[j for j in input()] for i in range(r)] # print(grid) queue = deque([[sy, sx, 0]]) ans = 0 visited = [[0 for j in range(c)] for i in range(r)] while queue: y, x, cnt = queue.popleft() if y == gy and x == gx: ans = cnt break if grid[y][x] == "#" or visited[y][x] == 1: continue visited[y][x] = 1 for i in [[1, 0], [-1, 0], [0, 1], [0, -1]]: if 0 <= y + i[0] < r and 0 <= x + i[1] < c: queue.append([y + i[0], x + i[1], cnt + 1]) print(ans)