結果
| 問題 | No.2738 CPC To F |
| コンテスト | |
| ユーザー |
lam6er
|
| 提出日時 | 2025-03-31 17:35:41 |
| 言語 | PyPy3 (7.3.15) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 1,056 bytes |
| 記録 | |
| コンパイル時間 | 193 ms |
| コンパイル使用メモリ | 82,128 KB |
| 実行使用メモリ | 93,216 KB |
| 最終ジャッジ日時 | 2025-03-31 17:36:27 |
| 合計ジャッジ時間 | 2,413 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 2 |
| other | AC * 5 WA * 17 |
ソースコード
n = int(input())
s = input().strip()
# Step 1: Count original CPCTF substrings
original_count = 0
for i in range(n - 4):
if s[i] == 'C' and s[i+1] == 'P' and s[i+2] == 'C' and s[i+3] == 'T' and s[i+4] == 'F':
original_count += 1
# Step 2: Collect all valid CPC positions that can generate CPCTF when converted
valid_cpc = []
for i in range(n - 2):
if s[i] == 'C' and s[i+1] == 'P' and s[i+2] == 'C':
# Check if the previous characters form T followed by CPC
if i >= 4:
if (s[i-1] == 'T' and
s[i-4] == 'C' and
s[i-3] == 'P' and
s[i-2] == 'C'):
valid_cpc.append( (i, i+2) )
# Step 3: Find the maximum non-overlapping intervals using greedy algorithm
conversion_count = 0
if valid_cpc:
# Sort intervals by their end points
valid_cpc.sort(key=lambda x: x[1])
last_end = -1
for start, end in valid_cpc:
if start > last_end:
conversion_count += 1
last_end = end
print(original_count + conversion_count)
lam6er