結果
| 問題 |
No.710 チーム戦
|
| ユーザー |
lam6er
|
| 提出日時 | 2025-03-20 18:44:26 |
| 言語 | PyPy3 (7.3.15) |
| 結果 |
AC
|
| 実行時間 | 866 ms / 3,000 ms |
| コード長 | 1,588 bytes |
| コンパイル時間 | 168 ms |
| コンパイル使用メモリ | 82,292 KB |
| 実行使用メモリ | 247,360 KB |
| 最終ジャッジ日時 | 2025-03-20 18:44:41 |
| 合計ジャッジ時間 | 11,610 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge4 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 2 |
| other | AC * 25 |
ソースコード
import sys
def main():
n = int(sys.stdin.readline())
tasks = []
totalA = 0
totalB = 0
for _ in range(n):
a, b = map(int, sys.stdin.readline().split())
tasks.append((a, b))
totalA += a
totalB += b
low = 0
high = max(totalA, totalB)
answer = high
def can_achieve(T):
# DP[a] represents the maximum sum of B_i for the chosen tasks where Yukio's total time is exactly 'a'
dp = [-1] * (T + 1)
dp[0] = 0 # Initial state: choosing no tasks
for a_i, b_i in tasks:
new_dp = [-1] * (T + 1)
for a_prev in range(T + 1):
if dp[a_prev] == -1:
continue
# Option 1: Do not take the current task
if new_dp[a_prev] < dp[a_prev]:
new_dp[a_prev] = dp[a_prev]
# Option 2: Take the current task with Yukio
a_new = a_prev + a_i
if a_new > T:
continue
b_new = dp[a_prev] + b_i
if new_dp[a_new] < b_new:
new_dp[a_new] = b_new
dp = new_dp
required_b = totalB - T
for a in range(T + 1):
if dp[a] >= required_b and a <= T:
return True
return False
while low <= high:
mid = (low + high) // 2
if can_achieve(mid):
answer = mid
high = mid - 1
else:
low = mid + 1
print(answer)
if __name__ == "__main__":
main()
lam6er