結果
問題 | No.919 You Are A Project Manager |
ユーザー | ningenMe |
提出日時 | 2019-09-16 02:03:07 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
TLE
|
実行時間 | - |
コード長 | 4,873 bytes |
コンパイル時間 | 1,957 ms |
コンパイル使用メモリ | 194,920 KB |
実行使用メモリ | 20,004 KB |
最終ジャッジ日時 | 2024-09-19 04:21:03 |
合計ジャッジ時間 | 10,323 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge2 |
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テストケース
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testcase_00 | TLE | - |
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testcase_57 | -- | - |
ソースコード
#include <bits/stdc++.h> using namespace std; template <class T> inline 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)...);} inline void balanceLtoR(multiset<long long>& stl,multiset<long long>& str) { while(stl.size()>str.size()+1) { long long tmp = *stl.rbegin(); str.insert(tmp); stl.erase(stl.find(tmp)); } } inline void balanceRtoL(multiset<long long>& stl,multiset<long long>& str) { if(stl.size()<str.size()) { stl.insert(*str.begin()); str.erase(str.begin()); } } inline void exchange(multiset<long long>& stl,multiset<long long>& str){ long long tmpl = *stl.rbegin(); long long tmpr = *str.begin(); if(tmpl>tmpr) { stl.erase(stl.find(tmpl)); stl.insert(tmpr); str.erase(str.find(tmpr)); str.insert(tmpl); } } int main() { cin.tie(0);ios::sync_with_stdio(false); int N; cin >> N; // assert(1<=N && N <= 5000); vector<long long> A(N); for(int i = 0; i < N; ++i) cin >> A[i]; // for(int i = 0; i < N; ++i) assert(-1000000000<=A[i] && A[i] <= 1000000000); //クエリ区間を列挙、調和級数なのでO(N*logN) vector<pair<long long,long long>> range; for(int n = 1; n <= N; ++n) { int M = N/n; for(int i = 0; i+n <= N; i+=n) range.push_back({i,i+n-1}); for(int i = N-M*n; i+n <= N; i+=n) range.push_back({i,i+n-1}); } //Mo順ソート O(N*logN*log(NlogN)) int bucket = max(1,(int)sqrt(N)-10); vector<int> idx(range.size()); iota(idx.begin(),idx.end(),0); sort(idx.begin(),idx.end(),[&](int a, int b){ auto al = range[a].first/bucket; auto& ar = range[a].second; auto bl = range[b].first/bucket; auto& br = range[b].second; return (al != bl) ? (al < bl) : ((al%2)?(ar > br):(ar < br)); }); //Moで中央値列挙 O(N*sqrt(N)*(logN)^2) int l = 0, r = 0; multiset<long long> stl,str; stl.insert(A[0]); unordered_map<long long,long long> mp; for(int& i:idx){ auto& xl = range[i].first; auto& xr = range[i].second; //左端を広げる while(xl < l){ l--; stl.insert(A[l]); if(str.size()) exchange(stl,str); balanceLtoR(stl,str); } //右端を広げる while(r < xr){ r++; stl.insert(A[r]); if(str.size()) exchange(stl,str); balanceLtoR(stl,str); } //左端を狭める while(l < xl){ if(stl.count(A[l])) { stl.erase(stl.find(A[l])); balanceRtoL(stl,str); } else { str.erase(str.find(A[l])); balanceLtoR(stl,str); } l++; } //右端を狭める while(xr < r){ if(stl.count(A[r])) { stl.erase(stl.find(A[r])); balanceRtoL(stl,str); } else { str.erase(str.find(A[r])); balanceLtoR(stl,str); } r--; } mp[xl*N+xr] = *stl.rbegin(); } long long ans = 0; int cnt = 0; //区間長決め打ち全探索O(N*logN) for(long long n = 1; n <= N; ++n) { int M = N/n; vector<long long> lSum(M,0),rSum(M,0); vector<pair<long long,long long>> lRange(M),rRange(M); //区間取得 for(int i = 0; i < M; ++i) { lRange[i] = range[cnt + i]; lSum[i] = n*mp[lRange[i].first*N+lRange[i].second]; rRange[i] = range[cnt + i + M]; rSum[i] = n*mp[rRange[i].first*N+rRange[i].second]; } //累積和 for(int i = 1; i < M; ++i) lSum[i] += lSum[i-1]; for(int i = M-2; 0 <= i; --i) rSum[i] += rSum[i+1]; chmax(ans,lSum[M-1]); chmax(ans,rSum[0]); for(int i = 0; i < M; ++i) { for(int j = 0; j < M; ++j) { if(lRange[i].second < rRange[j].first) { chmax(ans,max(0LL,lSum[i])+max(0LL,rSum[j])); } } } cnt += 2*M; } cout << ans << endl; return 0; }