제출 #1052749

#제출 시각아이디문제언어결과실행 시간메모리
1052749NonozeBouquet (EGOI24_bouquet)C++17
100 / 100
96 ms27068 KiB
/* * Author: Nonoze * Created: Saturday 27/07/2024 */ #include <bits/stdc++.h> using namespace std; #ifndef _IN_LOCAL #define dbg(...) #endif #define endl '\n' #define endlfl '\n' << flush #define quit(x) return (void)(cout << x << endl) template<typename T> void read(T& x, bool write=0, bool write2=1) { if (write && write2) cout << x << endl; else if (write) cout << x << ' '; else cin >> x;} template<typename T1, typename T2> void read(pair<T1, T2>& p, bool write=0, bool write2=1) { read(p.first, write, 0), read(p.second, write, 0); if (write && write2) cout << endl;} template<typename T> void read(vector<T>& v, bool write=0) { for (auto& x : v) read(x, write, 0); if (write) cout << endl; } template<typename T1, typename T2> void read(T1& x, T2& y, bool write=0) { read(x, write), read(y, write); if (write) cout << endl; } template<typename T1, typename T2, typename T3> void read(T1& x, T2& y, T3& z, bool write=0) { read(x, write), read(y, write), read(z, write); if (write) cout << endl; } template<typename T1, typename T2, typename T3, typename T4> void read(T1& x, T2& y, T3& z, T4& zz, bool write=0) { read(x, write), read(y, write), read(z, write), read(zz, write); if (write) cout << endl; } template<typename T> void print(T x) { read(x, 1); } template<typename T1, typename T2> void print(T1 x, T2 y) { read(x, y, 1); } template<typename T1, typename T2, typename T3> void print(T1 x, T2 y, T3 z) { read(x, y, z, 1); } template<typename T1, typename T2, typename T3, typename T4> void print(T1 x, T2 y, T3 z, T4 zz) { read(x, y, z, zz, 1); } #define sz(x) (int)(x.size()) #define all(x) (x).begin(), (x).end() #define rall(x) (x).rbegin(), (x).rend() #define pb push_back #define mp make_pair #define fi first #define se second #define cmin(a, b) a = min(a, b) #define cmax(a, b) a = max(a, b) #define int long long const int inf = numeric_limits<int>::max() / 4; mt19937 rng(chrono::steady_clock::now().time_since_epoch().count()); const int MOD = 1e9+7, LOG=25; void solve(); signed main() { ios::sync_with_stdio(0); cin.tie(0); int tt=1; // cin >> tt; while(tt--) solve(); return 0; } struct SegTree { int n; vector<int> t; SegTree(int _n) { n=_n; t.resize(4*n); } void update(int x, int val, int node=1, int l=0, int r=-1) { if (r==-1) r=n-1; if (l>x || r<x) return; if (l==r) { t[node]=val; return; } int mid=(l+r)/2; update(x, val, node*2, l, mid); update(x, val, node*2+1, mid+1, r); t[node]=max(t[node*2], t[node*2+1]); } int query(int x, int node=1, int l=0, int r=-1) { if (r==-1) r=n-1; if (l>x) return 0; if (r<=x) return t[node]; int mid=(l+r)/2; int s1=query(x, node*2, l, mid); int s2=query(x, node*2+1, mid+1, r); return max(s1, s2); } }; int n, k, m, q; vector<pair<int, int>> a; void solve() { read(n); a.clear(), a.resize(n); read(a); for (int i=0; i<n; i++) a[i].fi=i-a[i].fi-1, a[i].se+=i+1; SegTree st(n); vector<vector<int>> toadd(2*n+1); vector<int> ans(n); for (int i=0; i<n; i++) { toadd[a[i].se].pb(i); for (auto u: toadd[i]) st.update(u, ans[u]); ans[i]=st.query(a[i].fi)+1; } cout << *max_element(all(ans)) << endl; }
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