結果
問題 | No.2809 Sort Query |
ユーザー | GOTKAKO |
提出日時 | 2024-07-12 23:20:32 |
言語 | C++17(gcc12) (gcc 12.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 454 ms / 2,000 ms |
コード長 | 5,611 bytes |
コンパイル時間 | 3,293 ms |
コンパイル使用メモリ | 224,416 KB |
実行使用メモリ | 44,416 KB |
最終ジャッジ日時 | 2024-07-12 23:21:08 |
合計ジャッジ時間 | 33,469 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge6 |
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ファイルパターン | 結果 |
---|---|
other | AC * 71 |
ソースコード
#include <bits/stdc++.h> using namespace std; vector<long long> zaatull(vector<long long> &A){ vector<long long> B = A; sort(B.begin(),B.end()); B.erase(unique(B.begin(),B.end()),B.end()); return B; } using SS = long long; class SegmentTree{ public: long long siz = 1,n; vector<SS> dat; SS op(SS a, SS b){return a+b;} SS e(){return 0;} void renew (SS &a,SS x){ a = op(a,x); //a = x; //その他. } void make(long long N){ while(siz < N) siz *= 2; n = N; dat.resize(siz*2,e()); } void make2(long long N,vector<SS> &A){ make(N); for(long long i=0; i<N; i++){ long long pos = i+siz; dat.at(pos) = A.at(i); } for(long long i=siz-1; i>0; i--) dat.at(i) = op(dat.at(i*2),dat.at(i*2+1)); } void update(long long pos,SS x){ pos = pos+siz; renew(dat.at(pos),x); while(pos != 1){ pos = pos/2; dat.at(pos) = op(dat.at(pos*2),dat.at(pos*2+1)); } } SS findans(long long l, long long r){ SS retl = e(),retr = e(); l += siz,r += siz; while(l < r){ if(l&1) retl = op(retl,dat.at(l++)); if(r&1) retr = op(dat.at(--r),retr); l >>= 1; r >>= 1; } return op(retl,retr); } SS get(long long pos){return dat.at(pos+siz);} SS rangeans(long long l, long long r){return findans(l,r);} SS allrange(){return dat.at(1);} //rightは) leftは[で 渡す&返す. long long maxright(const function<bool(SS)> f,long long l = 0){ l += siz; long long r = n+siz; vector<long long> ls,rs; while(l < r){ if(l&1) ls.push_back(l++); if(r&1) rs.push_back(--r); l >>= 1; r >>= 1; } SS okl = e(); for(long long i=0; i<ls.size(); i++){ l = ls.at(i); SS now = op(okl,dat.at(l)); if(!f(now)){ while(l < siz){ l <<= 1; now = op(okl,dat.at(l)); if(f(now)){okl = now; l++;} } return l-siz; } okl = now; } for(long long i=rs.size()-1; i>=0; i--){ l = rs.at(i); SS now = op(okl,dat.at(l)); if(!f(now)){ while(l < siz){ l <<= 1; now = op(okl,dat.at(l)); if(f(now)){okl = now; l++;} } return l-siz; } okl = now; } return n; } long long minleft(const function<bool(SS)> f,long long r = -1){ if(r == -1) r = n; long long l = siz; r += siz; vector<long long> ls,rs; while(l < r){ if(l&1) ls.push_back(l++); if(r&1) rs.push_back(--r); l >>= 1; r >>= 1; } SS okr = e(); for(long long i=0; i<rs.size(); i++){ r = rs.at(i); SS now = op(dat.at(r),okr); if(!f(now)){ while(r < siz){ r <<= 1; r++; now = op(dat.at(r),okr); if(f(now)){okr = now; r--;} } return r+1-siz; } } for(long long i=ls.size()-1; i>=0; i--){ r = ls.at(i); SS now = op(dat.at(r),okr); if(!f(now)){ while(r < siz){ r <<= 1; r++; now = op(dat.at(r),okr); if(f(now)){okr = now; r--;} } return r+1-siz; } } return 0; } //ノーマルセグ木.一年の時を経て漸く二分探索実装した. }; int main() { ios_base::sync_with_stdio(false); cin.tie(nullptr); long long N,Q; cin >> N >> Q; vector<long long> B(N,-1); vector<long long> St; vector<long long> A(N),all; for(auto &a : A) cin >> a; all = A; vector<tuple<long long,long long,long long>> Query(Q,{-1,-1,-1}); for(auto &[t,k,x] : Query){ cin >> t; if(t == 1) cin >> k >> x,k--,all.push_back(x); if(t == 3) cin >> k,k--; } all = zaatull(all); long long n = all.size(); for(auto &a : A) a = lower_bound(all.begin(),all.end(),a)-all.begin(); for(auto &[t,k,x] : Query) if(t == 1) x = lower_bound(all.begin(),all.end(),x)-all.begin(); SegmentTree Z; Z.make(n); for(auto &a : A) Z.update(a,1); long long border = -1; auto f = [&](SS x){return x<border;}; bool sorted = false; for(auto &[t,k,x] : Query){ if(t == 1){ St.push_back(k); B.at(k) = x; } if(t == 2){ vector<pair<int,int>> change; for(auto pos : St){ if(B.at(pos) == -1) continue; border = pos+1; long long a1 = Z.maxright(f),a2 = B.at(pos); if(sorted == false) a1 = A.at(pos); change.push_back({a1,a2}); B.at(pos) = -1; } for(auto &[a1,a2] : change) Z.update(a1,-1),Z.update(a2,1); sorted = true; St.clear(); } if(t == 3){ if(B.at(k) != -1) cout << all.at(B.at(k)) << "\n"; else if(sorted == false) cout << all.at(A.at(k)) << "\n"; else{ border = k+1; cout << all.at(Z.maxright(f)) << "\n"; } } } }