結果
| 問題 |
No.2807 Have Another Go (Easy)
|
| コンテスト | |
| ユーザー |
lam6er
|
| 提出日時 | 2025-04-15 22:39:09 |
| 言語 | PyPy3 (7.3.15) |
| 結果 |
TLE
|
| 実行時間 | - |
| コード長 | 2,666 bytes |
| コンパイル時間 | 252 ms |
| コンパイル使用メモリ | 82,044 KB |
| 実行使用メモリ | 52,280 KB |
| 最終ジャッジ日時 | 2025-04-15 22:40:45 |
| 合計ジャッジ時間 | 4,869 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 * 1 TLE * 1 -- * 44 |
ソースコード
MOD = 998244353
def main():
import sys
input = sys.stdin.read().split()
ptr = 0
N = int(input[ptr]); ptr +=1
M = int(input[ptr]); ptr +=1
k = int(input[ptr]); ptr +=1
Cs = list(map(int, input[ptr:ptr+k]))
ptr +=k
# Precompute the total number of valid sequences
# This is the sum over s=2N-6 to 2N-1 of ways_total[s] * (s +7 -2N)
# Compute ways_total using dynamic programming
max_s_total = 2 * N -1
ways_total = [0] * (max_s_total +1)
ways_total[0] =1
for s in range(1, max_s_total +1):
for d in range(1,7):
if s -d >=0:
ways_total[s] = (ways_total[s] + ways_total[s-d]) % MOD
total_valid =0
for s in range(max(0, 2*N -6), 2*N):
if s > max_s_total:
continue
cnt = ways_total[s]
d_min = 2*N -s
if d_min <1:
valid_d =6
elif d_min >6:
valid_d =0
else:
valid_d =6 -d_min +1
total_valid = (total_valid + cnt * valid_d) % MOD
# For each query C, compute the forbidden count
for C in Cs:
# Initialize DP
dp = [[0]*N for _ in range(2)]
dp[0][0] =1 # start at sum 0 (a=0, r=0)
# Precompute transitions for a=0 and a=1
# We need to process sums up to 2N-1
max_s = 2*N -1
for s in range(0, max_s +1):
for a in [0,1]:
r = s - a*N
if a ==0 and s >=N:
continue
if a ==1 and (s <N or s >=2*N):
continue
if r <0 or r >=N:
continue
current = dp[a][r]
if current ==0:
continue
# Try adding d=1..6
for d in range(1,7):
new_s = s +d
if new_s >=2*N:
continue # handled in forbidden count
new_a = new_s // N
new_r = new_s % N
if new_a >=2:
continue
if new_r == C:
continue
dp[new_a][new_r] = (dp[new_a][new_r] + current) % MOD
# Compute forbidden count
forbidden =0
for r in range(N-6, N):
if r <0:
continue
s = N +r
if s >=2*N:
continue
valid_d = max(0, r +7 -N)
forbidden = (forbidden + dp[1][r] * valid_d) % MOD
ans = (total_valid - forbidden) % MOD
print(ans)
if __name__ == "__main__":
main()
lam6er