結果
| 問題 |
No.919 You Are A Project Manager
|
| ユーザー |
|
| 提出日時 | 2019-10-25 08:34:24 |
| 言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 3,229 bytes |
| コンパイル時間 | 1,965 ms |
| コンパイル使用メモリ | 183,744 KB |
| 実行使用メモリ | 14,016 KB |
| 最終ジャッジ日時 | 2024-07-19 04:07:50 |
| 合計ジャッジ時間 | 27,061 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| sample | -- * 3 |
| other | AC * 17 WA * 2 TLE * 2 -- * 34 |
ソースコード
#include <bits/stdc++.h>
using namespace std;
template <class T> void chmax(T& a, const T b){a=max(a,b);}
template <class T, class U>ostream &operator<<(ostream &o, const map<T, U>&obj) {o << "{"; for (auto &x : obj) o << " {" << x.first << " : " << x.second << "}" << ","; o << " }"; return o;}
template <class T>ostream &operator<<(ostream &o, const set<T>&obj) {o << "{"; for (auto itr = obj.begin(); itr != obj.end(); ++itr) o << (itr != obj.begin() ? ", " : "") << *itr; o << "}"; return o;}
template <class T>ostream &operator<<(ostream &o, const multiset<T>&obj) {o << "{"; for (auto itr = obj.begin(); itr != obj.end(); ++itr) o << (itr != obj.begin() ? ", " : "") << *itr; o << "}"; return o;}
template <class T>ostream &operator<<(ostream &o, const vector<T>&obj) {o << "{"; for (int i = 0; i < (int)obj.size(); ++i)o << (i > 0 ? ", " : "") << obj[i]; o << "}"; return o;}
template <class T, class U>ostream &operator<<(ostream &o, const pair<T, U>&obj) {o << "{" << obj.first << ", " << obj.second << "}"; return o;}
template <template <class tmp> class T, class U> ostream &operator<<(ostream &o, const T<U> &obj) {o << "{"; for (auto itr = obj.begin(); itr != obj.end(); ++itr)o << (itr != obj.begin() ? ", " : "") << *itr; o << "}"; return o;}
void print(void) {cout << endl;}
template <class Head> void print(Head&& head) {cout << head;print();}
template <class Head, class... Tail> void print(Head&& head, Tail&&... tail) {cout << head << " ";print(forward<Tail>(tail)...);}
int main() {
cin.tie(0);ios::sync_with_stdio(false);
int N; cin >> N;
vector<long long> A(N);
for(int i = 0; i < N; ++i) cin >> A[i];
long long ans = 0;
random_device rnd; // 非決定的な乱数生成器を生成
mt19937 mt(rnd()); // メルセンヌ・ツイスタの32ビット版、引数は初期シード値
uniform_int_distribution<> randK(1, N); // [0, 99] 範囲の一様乱数
for(int t = 0; t <= 10000; ++t) {
int k = randK(mt);
int M = N/k;
int i = 0;
vector<vector<long long>> vasc(M),vdsc(M);
vector<pair<int,int>> rasc(M),rdsc(M);
while(i+k<=N){
int idx = i/k;
for(int j = i;j<i+k;++j) {
vasc[idx].push_back(A[j]);
}
sort(vasc[idx].begin(),vasc[idx].end());
rasc[idx] = {i,i+k-1};
i += k;
}
i = N-1;
while(-1<=i-k){
int idx = (N-1-i)/k;
for(int j = i; i-k < j;--j) {
vdsc[idx].push_back(A[j]);
}
sort(vdsc[idx].begin(),vdsc[idx].end());
rdsc[idx] = {i-k+1,i};
i -= k;
}
reverse(vdsc.begin(),vdsc.end());
reverse(rdsc.begin(),rdsc.end());
vector<long long> sasc(M,0),sdsc(M,0);
for(int i = 0; i < M; ++i) sasc[i] = k*vasc[i][(k-1)/2];
for(int i = M-1; 0 <= i; --i) sdsc[i] = k*vdsc[i][(k-1)/2];
for(int i = 1; i < M; ++i) sasc[i] += sasc[i-1];
for(int i = M-2; 0 <= i; --i) sdsc[i] += sdsc[i+1];
for(int i = 1; i < M; ++i) chmax(sasc[i],sasc[i-1]);
for(int i = M-2; 0 <= i; --i) chmax(sdsc[i],sdsc[i+1]);
chmax(ans,sasc.back());
chmax(ans,sdsc.front());
int j = 0;
for(int i = 0; i < M; ++i) {
while(j < M && rasc[i].second >= rdsc[j].first) j++;
if(j<M && rasc[i].second < rdsc[j].first) {
chmax(ans,sasc[i]+sdsc[j]);
}
}
}
cout << ans << endl;
return 0;
}