結果
| 問題 |
No.2193 メガの下1桁
|
| コンテスト | |
| ユーザー |
lam6er
|
| 提出日時 | 2025-04-16 00:40:21 |
| 言語 | PyPy3 (7.3.15) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 1,126 bytes |
| コンパイル時間 | 496 ms |
| コンパイル使用メモリ | 82,056 KB |
| 実行使用メモリ | 53,840 KB |
| 最終ジャッジ日時 | 2025-04-16 00:43:33 |
| 合計ジャッジ時間 | 3,040 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge4 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 33 WA * 7 |
ソースコード
def compute_next_state(s, D_mod, B):
a = (s + D_mod) % B
e = s
if a == 0 and e == 0:
return 1 % B
elif a == 0:
return 0 % B
else:
return pow(a, e, B)
M = int(input())
D = int(input())
N = int(input())
B = int(input())
if N == 0:
print(M % B)
exit()
D_mod = D % B
s0 = M % B
states = [s0]
seen = {s0: 0}
pre = -1
cycle = []
for i in range(1, B + 1):
current = compute_next_state(states[-1], D_mod, B)
if current in seen:
pre = seen[current]
cycle = states[pre:]
cycle_length = len(cycle)
break
seen[current] = i
states.append(current)
else:
# This should not happen as per pigeonhole principle
cycle = []
cycle_length = 0
if pre == -1:
# Fallback in case no cycle found (though theoretically impossible)
if N < len(states):
result = states[N]
else:
result = states[-1]
else:
if N < len(states):
result = states[N]
else:
remaining_steps = N - pre
result = cycle[remaining_steps % cycle_length]
if result >= 10:
print('A')
else:
print(result)
lam6er