結果
問題 |
No.3244 Range Multiple of 8 Query
|
ユーザー |
![]() |
提出日時 | 2025-08-22 23:25:31 |
言語 | PyPy3 (7.3.15) |
結果 |
RE
|
実行時間 | - |
コード長 | 1,999 bytes |
コンパイル時間 | 314 ms |
コンパイル使用メモリ | 82,576 KB |
実行使用メモリ | 139,400 KB |
最終ジャッジ日時 | 2025-08-22 23:26:05 |
合計ジャッジ時間 | 32,919 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge1 |
(要ログイン)
ファイルパターン | 結果 |
---|---|
sample | AC * 1 |
other | AC * 6 RE * 17 TLE * 1 -- * 16 |
ソースコード
n, q = map(int, input().split()) S = input() S = [int(S[i])%8 for i in range(n)] D = [-1] * 10 dp = [[-1] * 10 for _ in range(n+2)] for i in range(n+1): for j in range(10): dp[i][j] = D[j] if i == n: break D[S[i]] = i C = set() inf = 1 << 60 D = [inf] * 1000 from itertools import permutations as P for now in range(1000): if now % 8: continue a = now now = str(now) now = "0" * (3 - len(now)) + now if "8" in now or "9" in now: continue D[a] = 0 for per in P(range(3), 3): nxt = "" for i in range(3): nxt += now[per[i]] nxt = int(nxt) if per == (1, 0, 2) or per == (0, 2, 1): D[nxt] = min(D[nxt], 1) elif per == (2, 1, 0): D[nxt] = min(D[nxt], 3) else: D[nxt] = min(D[nxt], 2) C.add("".join(sorted(now))) C = list(C) for _ in range(q): l, r = map(int, input().split()) l -= 1 ans = inf if r - l == 1: if S[l] == 0: print(0) else: print(-1) elif r - l == 2: if not (S[l] * 10 + S[r]) % 8: print(0) elif not (S[r] * 10 + S[l]) % 8: print(1) else: print(-1) else: for c in C: c = [int(c[i]) for i in range(3)] t0 = dp[r][c[0]] if c[0] == c[1]: t1 = dp[t0][c[1]] else: t1 = dp[r][c[1]] if c[1] == c[2]: t2 = dp[t1][c[2]] else: t2 = dp[r][c[2]] if min(t0, t1, t2) < l: continue A = [t0, t1, t2] A.sort() idx0, idx1, idx2 = A nxt = S[idx0] * 100 + S[idx1] * 10 + S[idx2] tmp = D[nxt] + (r-idx2-1)*3 + (idx2-idx1-1)*2 + (idx1-idx0-1) ans = min(ans, tmp) if ans >= inf: print(-1) else: print(ans)