結果
| 問題 | No.919 You Are A Project Manager |
| ユーザー |
 snrnsidy
|
| 提出日時 | 2021-07-20 01:23:14 |
| 言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 17,980 bytes |
| コンパイル時間 | 2,466 ms |
| コンパイル使用メモリ | 220,368 KB |
| 実行使用メモリ | 4,384 KB |
| 最終ジャッジ日時 | 2023-09-24 12:44:31 |
| 合計ジャッジ時間 | 7,877 ms |
|
ジャッジサーバーID （参考情報） |
judge13 / judge15 |
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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 | 68 ms
4,380 KB |
| testcase_01 | AC | 2 ms
4,380 KB |
| testcase_02 | AC | 1 ms
4,380 KB |
| testcase_03 | AC | 2 ms
4,380 KB |
| testcase_04 | AC | 16 ms
4,376 KB |
| testcase_05 | AC | 17 ms
4,376 KB |
| testcase_06 | AC | 3 ms
4,376 KB |
| testcase_07 | AC | 41 ms
4,380 KB |
| testcase_08 | WA | - |
| testcase_09 | WA | - |
| testcase_10 | WA | - |
| testcase_11 | WA | - |
| testcase_12 | WA | - |
| testcase_13 | WA | - |
| testcase_14 | WA | - |
| testcase_15 | WA | - |
| testcase_16 | WA | - |
| testcase_17 | WA | - |
| testcase_18 | AC | 68 ms
4,380 KB |
| testcase_19 | AC | 69 ms
4,376 KB |
| testcase_20 | WA | - |
| testcase_21 | AC | 68 ms
4,380 KB |
| testcase_22 | WA | - |
| testcase_23 | WA | - |
| testcase_24 | WA | - |
| testcase_25 | WA | - |
| testcase_26 | WA | - |
| testcase_27 | WA | - |
| testcase_28 | WA | - |
| testcase_29 | WA | - |
| testcase_30 | WA | - |
| testcase_31 | WA | - |
| testcase_32 | WA | - |
| testcase_33 | WA | - |
| testcase_34 | WA | - |
| testcase_35 | WA | - |
| testcase_36 | WA | - |
| testcase_37 | WA | - |
| testcase_38 | WA | - |
| testcase_39 | WA | - |
| testcase_40 | WA | - |
| testcase_41 | WA | - |
| testcase_42 | WA | - |
| testcase_43 | WA | - |
| testcase_44 | WA | - |
| testcase_45 | WA | - |
| testcase_46 | WA | - |
| testcase_47 | WA | - |
| testcase_48 | WA | - |
| testcase_49 | WA | - |
| testcase_50 | WA | - |
| testcase_51 | WA | - |
| testcase_52 | WA | - |
| testcase_53 | WA | - |
| testcase_54 | WA | - |
| testcase_55 | AC | 1 ms
4,380 KB |
| testcase_56 | AC | 2 ms
4,376 KB |
| testcase_57 | AC | 2 ms
4,376 KB |
ソースコード
#include <bits/stdc++.h>
#include <random>
using namespace std;
typedef unsigned int u32;
inline int popcount(u32 x) {
x = x - ((x >> 1) & 0x55555555);
x = (x & 0x33333333) + ((x >> 2) & 0x33333333);
return ((x + (x >> 4) & 0xF0F0F0F) * 0x1010101) >> 24;
}
//(k+1)番目の1の立っている位置(最下位から)を返す
//http://graphics.stanford.edu/~seander/bithacks.html#SelectPosFromMSBRank を参考にした
inline int select32(u32 x, int k) {
u32 a, b, c; int t, s;
a = (x & 0x55555555) + ((x >> 1) & 0x55555555);
b = (a & 0x33333333) + ((a >> 2) & 0x33333333);
c = (b & 0x0f0f0f0f) + ((b >> 4) & 0x0f0f0f0f);
t = (c & 0xff) + ((c >> 8) & 0xff);
s = 0;
s += ((t - k - 1) & 128) >> 3; k -= t & ((t - k - 1) >> 8); //if(k >= t) s += 16, k -= t;
t = (c >> s) & 0xf;
s += ((t - k - 1) & 128) >> 4; k -= t & ((t - k - 1) >> 8); //if(k >= t) s += 8, k -= t;
t = (b >> s) & 0x7;
s += ((t - k - 1) & 128) >> 5; k -= t & ((t - k - 1) >> 8); //if(k >= t) s += 4, k -= t;
t = (a >> s) & 0x3;
s += ((t - k - 1) & 128) >> 6; k -= t & ((t - k - 1) >> 8); //if(k >= t) s += 2, k -= t;
t = (x >> s) & 0x1;
s += ((t - k - 1) & 128) >> 7; //if(k >= t) s += 1;
return s;
}
//※静的なデータ構造
//constructした後setを何回か呼び、その後buildを呼んだ後にrank,selectが行える
struct FullyIndexableDictionary {
static const int NOTFOUND = -1;
static const int SELECTT_INTERVAL = 32; //SELECTT_INTERVAL >= 32
int length, blockslength, count;
vector<u32> blocks; vector<int> ranktable, selecttable0, selecttable1;
FullyIndexableDictionary(int len) : length(len) {
blocks.resize((blockslength = (len + 31) / 32) + 1);
}
inline void set(int i) { blocks[i / 32] |= 1 << i % 32; }
void build() {
if (length == 0) { count = 0; return; }
ranktable.assign(blockslength + 1, 0);
selecttable0.clear(); selecttable1.clear();
int prev0 = 0, prev1 = 0, count0 = 0, count1 = 0;
for (int i = 0; i < blockslength; i++) {
ranktable[i] = count1;
count1 += popcount(blocks[i]);
count0 = 32 * (i + 1) - count1;
if (prev1 < (count1 + SELECTT_INTERVAL - 1) / SELECTT_INTERVAL)
selecttable1.push_back(i), prev1 = (count1 + SELECTT_INTERVAL - 1) / SELECTT_INTERVAL;
if (prev0 < (count0 + SELECTT_INTERVAL - 1) / SELECTT_INTERVAL)
selecttable0.push_back(i), prev0 = (count0 + SELECTT_INTERVAL - 1) / SELECTT_INTERVAL;
}
ranktable[blockslength] = count1;
selecttable1.push_back(blockslength - 1);
selecttable0.push_back(blockslength - 1);
count = count1;
}
inline bool access(int pos) const {
return blocks[pos / 32] >> pos % 32 & 1;
}
inline int rank(int pos) const { //[0..pos)の1の個数
int block_idx = pos / 32;
return ranktable[block_idx] + popcount(blocks[block_idx] & (1U << pos % 32) - 1);
}
inline int rank(bool b, int pos) const { return b ? rank(pos) : pos - rank(pos); }
inline int rank(bool b, int left, int right) const { return rank(b, right) - rank(b, left); }
//O(log n)は重いよねえ。expect O(1) (たぶん) ならできるけど最悪ケースがなあ
//あるいはメモリ4*32*n bytes でO(1)でもできるけど…ハッシュテーブルでうまくやればうまくできるか？
template<bool b>
int select(int k) const { //(k+1)番目のbの位置
if ((b ? count : length - count) <= k) return NOTFOUND;
int selecttable_index = k / SELECTT_INTERVAL;
int l = (b ? selecttable1 : selecttable0)[selecttable_index],
u = (b ? selecttable1 : selecttable0)[selecttable_index + 1] + 1; //ブロックを二分探索
while (l + 1 < u) {
int m = (l + u) / 2;
((b ? ranktable[m] : m * 32 - ranktable[m]) <= k ? l : u) = m;
}
return l * 32 + select32(b ? blocks[l] : ~blocks[l], k - (b ? ranktable[l] : 32 * l - ranktable[l]));
}
inline int select(bool b, int k) const { return b ? select<true>(k) : select<false>(k); }
inline int select(bool b, int k, int left) const { return select(b, rank(b, left) + k); }
};
inline unsigned int BITMASK(int i) {
return (1 << i) - 1;
}
//※メモリ, 時間はだいたい支配的な部分のみ書く
//メモリ: (length * bitsize / 8) bytes
struct WaveletMatrix {
typedef unsigned long long Val;
static const int NOTFOUND = -1;
static const Val UNDEFINED = Val(-1);
static const int MAX_BITSIZE = 64;
int length, bitsize; Val maxval;
vector<FullyIndexableDictionary> dicts;
vector<int> mids;
//追加メモリ: (2 * length * sizeof Val) bytes
//時間: bitsize * length * 大きめ
void init(const vector<Val>& data) {
length = data.size();
maxval = *max_element(data.begin(), data.end());
if (1ULL << (8 * sizeof(Val) - 1) <= maxval) bitsize = 8 * sizeof(Val);
else for (bitsize = 0; Val(1) << bitsize <= maxval; bitsize++);
dicts.assign(bitsize, length);
mids.assign(bitsize, 0);
vector<Val> datacurrent(data), datanext(length);
for (int bit = 0; bit < bitsize; bit++) {
int pos = 0;
for (int i = 0; i < length; i++)
if ((datacurrent[i] >> (bitsize - bit - 1) & 1) == 0)
datanext[pos++] = datacurrent[i];
mids[bit] = pos;
for (int i = 0; i < length; i++)
if ((datacurrent[i] >> (bitsize - bit - 1) & 1) != 0)
dicts[bit].set(i), datanext[pos++] = datacurrent[i];
dicts[bit].build();
datacurrent.swap(datanext);
}
}
Val access(int pos) const {
Val val = 0;
for (int bit = 0; bit < bitsize; bit++) {
bool dir = dicts[bit].access(pos);
val = val << 1 | (dir ? 1 : 0);
pos = dicts[bit].rank(dir, pos);
if (dir) pos += mids[bit];
}
return val;
}
int rank(Val val, int left, int right) const {
if (val > maxval) return 0;
for (int bit = 0; bit < bitsize; bit++) {
bool dir = val >> (bitsize - bit - 1) & 1;
left = dicts[bit].rank(dir, left), right = dicts[bit].rank(dir, right);
if (dir) left += mids[bit], right += mids[bit];
}
return right - left;
}
int rank(Val val, int right) const { return rank(val, 0, right); }
int rank_all(Val val, int left, int right, int& out_lt, int& out_gt) const {
if (val > maxval) { out_lt = right - left; out_gt = 0; return 0; }
out_lt = out_gt = 0;
for (int bit = 0; bit < bitsize; bit++) {
bool dir = val >> (bitsize - bit - 1) & 1;
int leftcount = dicts[bit].rank(dir, left), rightcount = dicts[bit].rank(dir, right);
(dir ? out_lt : out_gt) += (right - left) - (rightcount - leftcount);
left = leftcount, right = rightcount;
if (dir) left += mids[bit], right += mids[bit];
}
return right - left;
}
inline int rank_lt(Val val, int left, int right) const {
int tmp_lt, tmp_gt;
rank_all(val, left, right, tmp_lt, tmp_gt);
return tmp_lt;
}
inline int rangefreq(int left, int right, Val bottom, Val up) {
return rank_lt(up, left, right) - rank_lt(bottom, left, right);
}
//O(bitsize log length) (FID::selectがlog nで最悪の場合)
int select(Val val, int k) const {
if (val > maxval) return NOTFOUND;
static int lefts[MAX_BITSIZE], rights[MAX_BITSIZE];
int left = 0, right = length;
for (int bit = 0; bit < bitsize; bit++) {
lefts[bit] = left, rights[bit] = right;
bool dir = val >> (bitsize - bit - 1) & 1;
left = dicts[bit].rank(dir, left), right = dicts[bit].rank(dir, right);
if (dir) left += mids[bit], right += mids[bit];
}
for (int bit = bitsize - 1; bit >= 0; bit--) {
k = dicts[bit].select(val >> (bitsize - bit - 1) & 1, k, lefts[bit]);
if (k == FullyIndexableDictionary::NOTFOUND || k >= rights[bit])
return NOTFOUND;
k -= lefts[bit];
}
return k;
}
int select(Val val, int k, int left) const { return select(val, k + rank(val, left)); }
void quantile(int left, int right, int k, Val& out_val, int& out_k) const {
if (right - left <= k) { out_val = UNDEFINED; out_k = NOTFOUND; return; }
Val val = 0;
for (int bit = 0; bit < bitsize; bit++) {
int count = dicts[bit].rank(true, left, right);
bool dir = k < count;
val = val << 1 | (dir ? 1 : 0);
if (!dir) k -= count;
left = dicts[bit].rank(dir, left), right = dicts[bit].rank(dir, right);
if (dir) left += mids[bit], right += mids[bit];
}
out_val = val; out_k = k;
}
struct IdxVal {
int idx; Val val;
IdxVal() {}
IdxVal(int i, Val v) : idx(i), val(v) {}
};
inline Val quantile(int left, int right, int k) const {
Val tmp_val; int tmp_k;
quantile(left, right, k, tmp_val, tmp_k);
return tmp_val;
}
inline IdxVal quantile_idxval(int left, int right, int k) const {
Val tmp_val; int tmp_k;
quantile(left, right, k, tmp_val, tmp_k);
return IdxVal(select(tmp_val, tmp_k, left), tmp_val);
}
inline Val maximum(int left, int right) const { return quantile(left, right, 0); }
inline Val minimum(int left, int right) const { return quantile(left, right, right - left - 1); }
//区間がかぶってるとkとかがintより大きくなるよね
void quantile_ranges(const vector<int>& lefts0, const vector<int>& rights0, int k, Val& out_val, int& out_k) const {
int n = lefts0.size();
int width = 0;
for (int i = 0; i < n; i++) width += rights0[i] - lefts0[i];
if (width <= k) { out_val = UNDEFINED; out_k = NOTFOUND; return; }
static vector<int> lefts, rights; //自動変数だとメモリ確保の時間…と思ったけどこれだとどうだろう？
lefts.assign(lefts0.begin(), lefts0.end());
rights.assign(rights0.begin(), rights0.end());
Val val = 0;
for (int bit = 0; bit < bitsize; bit++) {
int count = 0;
for (int i = 0; i < n; i++) {
count += dicts[bit].rank(true, lefts[i], rights[i]);
}
bool dir = k < count;
val = val << 1 | (dir ? 1 : 0);
if (!dir) k -= count;
for (int i = 0; i < n; i++) {
lefts[i] = dicts[bit].rank(dir, lefts[i]);
rights[i] = dicts[bit].rank(dir, rights[i]);
if (dir) lefts[i] += mids[bit], rights[i] += mids[bit];
}
}
out_val = val; out_k = k;
}
//区間がかぶってるとバグる
//区間がソートされていないとバグる
inline IdxVal quantile_ranges_idxval(const vector<int>& lefts, const vector<int>& rights, int k) const {
int n = lefts.size();
Val tmp_val; int tmp_k;
quantile_ranges(lefts, rights, k, tmp_val, tmp_k);
for (int i = 0; i < n; i++) {
if (tmp_k < rights[i] - lefts[i]) {
return IdxVal(select(tmp_val, tmp_k, lefts[i]), tmp_val);
}
tmp_k -= rights[i] - lefts[i];
}
return IdxVal(NOTFOUND, UNDEFINED);
}
struct Range {
int left, right;
int bit; Val val;
Range(int l, int r, int b, Val v) :
left(l), right(r), bit(b), val(v) {}
};
//O(bitsize min(length, maxval) log min(length, maxval))?
//priority_queueではやはり最悪ケースが…
//でもランダムで適当(バラけすぎとかが無い)なデータに対しては結構速い
template<typename F, typename FOut>
int rectbfsk(const F& f, int left, int right, Val bottom, Val up, int k, FOut& out) const {
int k0 = k;
up = min(up, maxval + 1);
priority_queue<Range, vector<Range>, F> q(f);
q.push(Range(left, right, 0, 0));
while (k && !q.empty()) {
Range t = q.top(); q.pop();
if (t.bit == bitsize) {
f.pushvalues(out, t, k);
}
else {
int leftcount = dicts[t.bit].rank(false, t.left);
int rightcount = dicts[t.bit].rank(false, t.right);
if (rightcount - leftcount != 0 &&
bottom <= ((t.val << (bitsize - t.bit)) | BITMASK(bitsize - t.bit - 1)))
q.push(Range(leftcount, rightcount, t.bit + 1, t.val << 1));
if ((t.right - t.left) - (rightcount - leftcount) != 0 &&
(((t.val << 1 | 1) << (bitsize - t.bit - 1))) < up) {
q.push(Range(
(t.left - leftcount) + mids[t.bit], (t.right - rightcount) + mids[t.bit],
t.bit + 1, t.val << 1 | 1));
}
}
}
return k0 - k;
}
struct ValCount {
Val val; int count;
ValCount(Val v, int c) : val(v), count(c) {}
ValCount() {}
};
struct FreqList {
inline bool operator()(const Range& x, const Range& y) const {
return x.right - x.left < y.right - y.left ||
(x.right - x.left == y.right - y.left && x.val > y.val);
}
inline void pushvalues(vector<ValCount>& out, const Range& t, int& k) const {
out.push_back(ValCount(t.val, t.right - t.left));
k--;
}
};
inline int topk(int left, int right, Val bottom, Val up, int k, vector<ValCount>& out) const {
return rectbfsk<FreqList, vector<ValCount> >(FreqList(), left, right, bottom, up, k, out);
}
template<typename F, typename FOut>
struct DfsInfo {
const F& f;
FOut& out;
Val bottom, up;
DfsInfo(const F& f_, FOut& o, Val b, Val u) : f(f_), out(o), bottom(b), up(u) {}
};
//O(min(k bitsize, min(length, maxval)))?
//minじゃなくてもう少しなめらかな関数で上界得られそうだけど…kつの中で幅に入らない分は共有されるイメージ
//でもO(k bitsize)はやはり心強いな。k=1ならO(bitsize)となるわけだし
template<typename F, typename FOut>
void rectdfsk_dfs(const DfsInfo<F, FOut>& info, int bit, Val val, int left, int right, int& k) const {
if (bit == bitsize) {
info.f.pushvalues(info.out, val, right - left, k);
return;
}
int leftcount = dicts[bit].rank(left);
int rightcount = dicts[bit].rank(right);
if (F::MAXF) {
if (k > 0 && rightcount - leftcount != 0 &&
(((val << 1 | 1) << (bitsize - bit - 1)) < info.up))
rectdfsk_dfs<F, FOut>(info, bit + 1, val << 1 | 1, leftcount + mids[bit], rightcount + mids[bit], k);
if (k > 0 && (right - left) - (rightcount - leftcount) != 0 && (info.bottom <= ((val << (bitsize - bit)) | BITMASK(bitsize - bit - 1))))
rectdfsk_dfs<F, FOut>(info, bit + 1, val << 1, left - leftcount, right - rightcount, k);
}
else {
if (k > 0 && (right - left) - (rightcount - leftcount) != 0 &&
(info.bottom <= ((val << (bitsize - bit)) | BITMASK(bitsize - bit - 1))))
rectdfsk_dfs<F, FOut>(info, bit + 1, val << 1, left - leftcount, right - rightcount, k);
if (k > 0 && rightcount - leftcount != 0 &&
(((val << 1 | 1) << (bitsize - bit - 1)) < info.up))
rectdfsk_dfs<F, FOut>(info, bit + 1, val << 1 | 1, leftcount + mids[bit], rightcount + mids[bit], k);
}
}
template<bool maxf>
struct MinMaxList {
enum { MAXF = maxf };
inline void pushvalues(vector<ValCount>& out, Val val, int count, int& k) const {
out.push_back(ValCount(val, min(k, count)));
k -= min(k, count);
}
};
template<typename F, typename FOut>
int rectdfsk(const F& f, int left, int right, Val bottom, Val up, int k, FOut& out) const {
rectdfsk_dfs<F, FOut>(DfsInfo<F, FOut>(f, out, bottom, up), 0, 0, left, right, k);
return k;
}
template<bool maxf>
int rectminmaxk(int left, int right, Val bottom, Val up, int k, vector<ValCount>& out) const {
return rectdfsk<MinMaxList<maxf>, vector<ValCount> >(MinMaxList<maxf>(), left, right, bottom, up, k, out);
}
};
ostream& operator<<(ostream& o, const WaveletMatrix::IdxVal& idxval) {
return o << "(" << idxval.idx << ": " << idxval.val << ")";
}
long long int L[10005];
long long int R[10005];
int main(void)
{
cin.tie(0);
ios::sync_with_stdio(false);
int n, t;
vector <int> v;
vector<WaveletMatrix::Val> x;
cin >> n;
for (int i = 0; i < n; i++)
{
cin >> t;
t += 1e9;
v.push_back(t);
}
WaveletMatrix wm;
for (auto it : v)
{
x.push_back(it);
}
wm.init(x);
long long int res = 0;
for (long long int K = 1; K <= n; K++)
{
int k = (K + 1) / 2 - 1;
L[0] = 0;
for (int j = 0; j < (n / K); j++)
{
L[j + 1] = L[j] + wm.quantile(j*K, (j+1)*K, K - k - 1) - 1e9;
}
R[0] = 0;
for (int j = 0; j < (n / K); j++)
{
R[j + 1] = R[j] + wm.quantile(n - (j + 1) * K, n - j * K, K - k - 1) - 1e9;
}
long long int temp = 0;
int r = 1;
for (int l = (n / K); l >= 0; l--)
{
res = max(res, (L[l] + temp) * K);
temp = max(temp, R[r]);
r++;
}
}
cout << res << '\n';
return 0;
}