結果

問題 No.1248 Kth Sum
ユーザー chineristACchineristAC
提出日時 2020-10-02 21:52:05
言語 PyPy3
(7.3.15)
結果
RE  
実行時間 -
コード長 8,514 bytes
コンパイル時間 361 ms
コンパイル使用メモリ 82,200 KB
実行使用メモリ 133,900 KB
最終ジャッジ日時 2024-07-16 04:50:41
合計ジャッジ時間 10,930 ms
ジャッジサーバーID
(参考情報)
judge1 / judge3
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 36 ms
53,932 KB
testcase_01 AC 38 ms
54,256 KB
testcase_02 AC 41 ms
55,504 KB
testcase_03 RE -
testcase_04 WA -
testcase_05 WA -
testcase_06 WA -
testcase_07 WA -
testcase_08 WA -
testcase_09 WA -
testcase_10 WA -
testcase_11 WA -
testcase_12 WA -
testcase_13 AC 234 ms
106,216 KB
testcase_14 WA -
testcase_15 AC 255 ms
111,980 KB
testcase_16 WA -
testcase_17 WA -
testcase_18 WA -
testcase_19 WA -
testcase_20 WA -
testcase_21 WA -
testcase_22 WA -
testcase_23 AC 38 ms
54,424 KB
testcase_24 WA -
testcase_25 AC 270 ms
108,672 KB
testcase_26 WA -
testcase_27 AC 387 ms
130,652 KB
testcase_28 AC 388 ms
130,532 KB
testcase_29 RE -
testcase_30 WA -
testcase_31 WA -
testcase_32 WA -
testcase_33 WA -
testcase_34 WA -
testcase_35 WA -
testcase_36 WA -
testcase_37 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 #

"""
多重平衡二分木
挿入、削除、bisect、k番目の値の取得,k番目までの値の和の取得がO(logL)で可能
同じ値には違うidを与えて区別する
idが足りなくなったらid数を二倍にして保持している値を一から挿入しなおすことでならし計算量がO(logL+logK)になるはず…
あらかじめid数を設定することもできる

verify:ABC127F,ABC170E
"""
class MultiBalancingTree:
    def __init__(self, n,id=0):
        self.N = n
        self.id_size=id
        self.root = self.node(1<<(n+self.id_size), 1<<(n+self.id_size),self.id_size)
        self.val_dic={}

    def debug(self):
        def debug_info(nd_):
            return (nd_.value,(nd_.value - 1)>>self.id_size, nd_.pivot , nd_.left.value - 1 if nd_.left else -1, nd_.right.value - 1 if nd_.right else -1,nd_.cnt)

        def debug_node(nd):
            re = []
            if nd.left:
                re += debug_node(nd.left)
            if nd.value: re.append(debug_info(nd))
            if nd.right:
                re += debug_node(nd.right)
            return re
        print("Debug - root =", self.root.value - 1, debug_node(self.root)[:50])

    def rebuild(self,v):
        self.id_size+=1
        #print("rebuild:",self.id_size)
        self.root=self.node(1<<(self.N+self.id_size), 1<<(self.N+self.id_size),self.id_size)
        check=[]
        for val in self.val_dic:
            cnt=self.val_dic[val]
            self.val_dic[val]=0
            for j in range(cnt):
                self.append(val)
        self.append(v)

    def append(self,v):
        if v not in self.val_dic:
            self.val_dic[v]=0
        id=self.val_dic[v]
        if id>=2**self.id_size:
            self.rebuild(v)
        else:
            V=(v<<self.id_size)+id
            self.val_dic[v]+=1
            self._append(V)

    def _append(self, v):
        v += 1
        nd = self.root
        while True:
            if v == nd.value:
                return 0
            else:
                nd.cnt+=1
                nd.sum+=(v-1)>>self.id_size
                mi, ma = min(v, nd.value), max(v, nd.value)
                if mi < nd.pivot:
                    nd.value = ma
                    if nd.left:
                        nd = nd.left
                        v = mi
                    else:
                        p = nd.pivot
                        nd.left = self.node(mi, p - (p&-p)//2,self.id_size)
                        break
                else:
                    nd.value = mi
                    if nd.right:
                        nd = nd.right
                        v = ma
                    else:
                        p = nd.pivot
                        nd.right = self.node(ma, p + (p&-p)//2,self.id_size)
                        break

    def kth(self,k):
        cnt=k
        nd=self.root
        while True:
            if nd.left:
                if nd.left.cnt<k:
                    k-=nd.left.cnt+1
                    if nd.right:
                        nd=nd.right
                    else:
                        raise IndexError("BalancingTree doesn't hold kth number")
                elif nd.left.cnt==k:
                    return (nd.value-1)>>self.id_size
                else:
                    nd=nd.left
            else:
                if k==0:
                    return (nd.value-1)>>self.id_size
                if nd.right:
                    k-=1
                    nd=nd.right
                else:
                    raise IndexError("BalancingTree doesn't hold kth number")

    def kth_sum(self,k):
        if k==-1:
            return 0
        cnt=k
        res_sum=0
        nd=self.root
        while True:
            if nd.left:
                if nd.left.cnt<k:
                    k-=nd.left.cnt+1
                    res_sum+=nd.left.sum+((nd.value-1)>>self.id_size)
                    if nd.right:
                        nd=nd.right
                    else:
                        raise IndexError("BalancingTree doesn't hold kth number")
                elif nd.left.cnt==k:
                    res_sum+=nd.left.sum+((nd.value-1)>>self.id_size)
                    return res_sum,(nd.value-1)>>self.id_size
                else:
                    nd=nd.left
            else:
                if k==0:
                    return res_sum+((nd.value-1)>>self.id_size),(nd.value-1)>>self.id_size
                if nd.right:
                    k-=1
                    res_sum+=((nd.value-1)>>self.id_size)
                    nd=nd.right
                else:
                    raise IndexError("BalancingTree doesn't hold kth number")

    def kth_sum_big(self,k):
        res_sum=self.sum
        if self.size>k:
            res_sum-=self.kth_sum(self.size-k-2)
            return res_sum
        else:
            raise IndexError("BalancingTree doesn't hold kth number")

    def leftmost(self, nd):
        while nd.left:
            nd=nd.left
        return nd

    def rightmost(self, nd):
        while nd.right:
            nd=nd.right
        return nd

    def find_l(self, v):
        v += 1
        nd = self.root
        prev = 0
        if nd.value < v: prev = nd.value
        while True:
            if v <= nd.value:
                if nd.left:
                    nd = nd.left
                else:
                    return (prev - 1)>>self.id_size
            else:
                prev = nd.value
                if nd.right:
                    nd = nd.right
                else:
                    return (prev - 1)>>self.id_size

    def find_r(self, v):
        v += 1
        nd = self.root
        prev = 0
        if nd.value > v: prev = nd.value
        while True:
            if v < nd.value:
                prev = nd.value
                if nd.left:
                    nd = nd.left
                else:
                    return (prev - 1)>>self.id_size
            else:
                if nd.right:
                    nd = nd.right
                else:
                    return (prev - 1)>>self.id_size

    @property
    def max(self):
        if self.size:
            return self.find_l((1<<(self.N+self.id_size))-1)
        return 0

    @property
    def min(self):
        if self.size:
            return self.find_r(-1)
        return 0

    @property
    def sum(self):
        return self.root.sum-((self.root.value-1)>>self.id_size)

    @property
    def size(self):
        return self.root.cnt-1

    def delete(self,v):
        id=self.val_dic[v]-1
        if id==-1:
            raise IndexError("You are an idiot")
        V=(v<<self.id_size)+id
        self._delete(V)
        self.val_dic[v]-=1

    def _delete(self, v, nd = None, prev = None):
        v += 1
        if not nd: nd = self.root
        if not prev: prev = nd
        while v != nd.value:
            prev = nd
            nd.cnt-=1
            nd.sum-=(v-1)>>self.id_size
            if v <= nd.value:
                if nd.left:
                    nd = nd.left
                else:
                    return
            else:
                if nd.right:
                    nd = nd.right
                else:
                    return
        nd.cnt-=1
        nd.sum-=(v-1)>>self.id_size
        if (not nd.left) and (not nd.right):
            if not prev.left:
                prev.right=None
            elif not prev.right:
                prev.left=None
            else:
                if nd.pivot==prev.left.pivot:
                    prev.left=None
                else:
                    prev.right=None
        elif nd.right:
            nd.value = self.leftmost(nd.right).value
            self._delete(nd.value - 1, nd.right, nd)
        else:
            nd.value = self.rightmost(nd.left).value
            self._delete(nd.value - 1, nd.left, nd)

    def __contains__(self, v: int) -> bool:
        return self.find_r(v - 1) == v

    def __len__(self):
        return self.size

    class node:
        def __init__(self, v, p, m):
            self.value = v
            self.pivot = p
            self.left = None
            self.right = None
            self.cnt=1
            self.sum=(v-1)>>m

N,K = map(int,input().split())
A = list(map(int,input().split()))

ans = 10**18
BT = MultiBalancingTree(30,id=18)
for i in range(1,N+1):
    if i*K>N:
        break
    tmp = A[i*K-1]
    for j in range((i-1)*K,i*K-1):
        BT.append(A[j])
    if i>=2:
        tmp += BT.kth_sum(i-2)[0]
    ans = min(ans,tmp)

print(ans)
0