結果

問題 No.2796 Small Matryoshka
ユーザー tassei903tassei903
提出日時 2024-06-28 23:14:55
言語 PyPy3
(7.3.15)
結果
WA  
実行時間 -
コード長 3,918 bytes
コンパイル時間 264 ms
コンパイル使用メモリ 82,432 KB
実行使用メモリ 197,084 KB
最終ジャッジ日時 2024-06-28 23:15:09
合計ジャッジ時間 10,739 ms
ジャッジサーバーID
（参考情報） 		judge5 / judge1
このコードへのチャレンジ
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テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 82 ms
67,584 KB
testcase_01 AC 54 ms
67,840 KB
testcase_02 AC 55 ms
67,328 KB
testcase_03 AC 54 ms
67,840 KB
testcase_04 WA -
testcase_05 AC 230 ms
96,420 KB
testcase_06 AC 974 ms
197,084 KB
testcase_07 AC 68 ms
71,552 KB
testcase_08 AC 660 ms
127,092 KB
testcase_09 AC 967 ms
167,696 KB
testcase_10 AC 1,039 ms
167,676 KB
testcase_11 AC 1,101 ms
182,828 KB
testcase_12 WA -
testcase_13 WA -
testcase_14 WA -
testcase_15 WA -
testcase_16 WA -
testcase_17 WA -
testcase_18 WA -
testcase_19 WA -
testcase_20 WA -
testcase_21 WA -
権限があれば一括ダウンロードができます

ソースコード

diff # 

def _ceil_pow2(n: int) -> int:
    x = 0
    while (1 << x) < n:
        x += 1

    return x


def _bsf(n: int) -> int:
    x = 0
    while n % 2 == 0:
        x += 1
        n //= 2

    return x

import typing
class SegTree:
    def __init__(self,
                 op: typing.Callable[[typing.Any, typing.Any], typing.Any],
                 e: typing.Any,
                 v: typing.Union[int, typing.List[typing.Any]]) -> None:
        self._op = op
        self._e = e

        if isinstance(v, int):
            v = [e] * v

        self._n = len(v)
        self._log = _ceil_pow2(self._n)
        self._size = 1 << self._log
        self._d = [e] * (2 * self._size)

        for i in range(self._n):
            self._d[self._size + i] = v[i]
        for i in range(self._size - 1, 0, -1):
            self._update(i)

    def set(self, p: int, x: typing.Any) -> None:
        assert 0 <= p < self._n

        p += self._size
        self._d[p] = x
        for i in range(1, self._log + 1):
            self._update(p >> i)

    def get(self, p: int) -> typing.Any:
        assert 0 <= p < self._n

        return self._d[p + self._size]

    def prod(self, left: int, right: int) -> typing.Any:
        assert 0 <= left <= right <= self._n
        sml = self._e
        smr = self._e
        left += self._size
        right += self._size

        while left < right:
            if left & 1:
                sml = self._op(sml, self._d[left])
                left += 1
            if right & 1:
                right -= 1
                smr = self._op(self._d[right], smr)
            left >>= 1
            right >>= 1

        return self._op(sml, smr)

    def all_prod(self) -> typing.Any:
        return self._d[1]

    def max_right(self, left: int,
                  f: typing.Callable[[typing.Any], bool]) -> int:
        assert 0 <= left <= self._n
        assert f(self._e)

        if left == self._n:
            return self._n

        left += self._size
        sm = self._e

        first = True
        while first or (left & -left) != left:
            first = False
            while left % 2 == 0:
                left >>= 1
            if not f(self._op(sm, self._d[left])):
                while left < self._size:
                    left *= 2
                    if f(self._op(sm, self._d[left])):
                        sm = self._op(sm, self._d[left])
                        left += 1
                return left - self._size
            sm = self._op(sm, self._d[left])
            left += 1

        return self._n

    def min_left(self, right: int,
                 f: typing.Callable[[typing.Any], bool]) -> int:
        assert 0 <= right <= self._n
        assert f(self._e)

        if right == 0:
            return 0

        right += self._size
        sm = self._e

        first = True
        while first or (right & -right) != right:
            first = False
            right -= 1
            while right > 1 and right % 2:
                right >>= 1
            if not f(self._op(self._d[right], sm)):
                while right < self._size:
                    right = 2 * right + 1
                    if f(self._op(self._d[right], sm)):
                        sm = self._op(self._d[right], sm)
                        right -= 1
                return right + 1 - self._size
            sm = self._op(self._d[right], sm)

        return 0

    def _update(self, k: int) -> None:
        self._d[k] = self._op(self._d[2 * k], self._d[2 * k + 1])


n = int(input())
lr = []
s = {-10**9}
for i in range(n):
    l, r = map(int, input().split())
    lr.append((r, -l))
    s.add(l)
    s.add(r)
lr.sort()
s = sorted(list(s))
d = {x: i for i, x in enumerate(s)}
m = len(s)
st = SegTree(max,0, [0] * m)
st.set(0, 0)
for r, l in lr:
    R = d[r]
    L = d[-l]
    #print(L, R)
    res = st.prod(0, L+1) + 1
    st.set(R, max(st.get(R), res))
print(n-st.all_prod())
0