Submission #1187341

#	Time	Username	Problem	Language	Result	Execution time	Memory
1187341		thelegendary08	Financial Report (JOI21_financial)	C++17	19 / 100	171 ms	37936 KiB

Main

#include<bits/stdc++.h>
#define pb push_back
#define mp make_pair
#define int long long
#define vi vector<int>
#define vvi vector<vector<int>>
#define pii pair<int, int>
#define vpii vector<pair<int, int>>
#define vc vector<char>
#define vb vector<bool>
#define mii map<int,int>
#define f0r(i,n) for(int i=0;i<n;i++)
#define FOR(i,k,n) for(int i=k;i<n;i++)
#define all(v) (v).begin(),(v).end()
#define rall(v) (v).rbegin(),(v).rend()
#define in(a) int a; cin>>a
#define in2(a,b) int a,b; cin>>a>>b
#define in3(a,b,c) int a,b,c; cin>>a>>b>>c
#define in4(a,b,c,d) int a,b,c,d; cin>>a>>b>>c>>d
#define vin(v,n); vi v(n); f0r(i,n){cin>>v[i];}
#define out(a) cout<<a<<'\n'
#define out2(a,b) cout<<a<<' '<<b<<'\n'
#define out3(a,b,c) cout<<a<<' '<<b<<' '<<c<<'\n'
#define out4(a,b,c,d) cout<<a<<' '<<b<<' '<<c<<' '<<d<<'\n'
#define pout(a) cout<<a.first<<' '<<a.second<<'\n'
#define vout(v) for(auto u : v){cout<<u<<' ';} cout<<'\n'
#define dout(a) cout<<a<<' '<<#a<<'\n'
#define dout2(a,b) cout<<a<<' '<<#a<<' '<<b<<' '<<#b<<'\n'
#define yn(x); if(x){cout<<"YES"<<'\n';}else{cout<<"NO"<<'\n';}
const int leg = 1e9 + 7;
const int mod = 998244353;
using namespace std;
struct minsegtree{
	int n;
	vi tree;
	void update(int k, int x){
		k += n;
		tree[k] = x;
		for(k/=2; k>=1; k/=2){
			tree[k] = min(tree[k*2], tree[k*2+1]);
		}
	}
	int quer(int l, int r){
		l += n; r += n;
		int ret = 4e18;
		while(l <= r){
			if(l % 2 == 1)ret = min(ret, tree[l++]);
			if(r % 2 == 0)ret = min(ret, tree[r--]);
			l/=2; r/=2;
		}
		return ret;
	}
	minsegtree(vi &a){
		n = a.size();
		tree.resize(2*n+5);
		f0r(i,n)update(i,a[i]);
	}
	
};

struct maxsegtree{
	int n;
	vi tree;
	void build(int node, int l, int r, vi &a){
		if(l == r){
			tree[node] = a[l];
			return;
		}
		int mid = (l + r) / 2;
		build(node*2, l, mid, a);
		build(node*2+1, mid+1, r, a);
		tree[node] = max(tree[node*2], tree[node*2+1]);
	}
	int firsthigher(int node, int tl, int tr, int l, int r, int x){
		if(tl > r || tr < l) return -1;
	    if(tree[node] <= x) return -1;
	
	    if (tl== tr) return tl;
	
	    int tm = tl + (tr-tl)/2;
	    int left = firsthigher(2*node, tl, tm, l, r, x);
	    if(left != -1) return left;
	    return firsthigher(2*node+1, tm+1, tr, l ,r, x);
		
	}
	void update(int node, int tl, int tr, int k, int x){
		if(tl == tr){
			tree[node] = x;
			return;
		}
		int tm = (tl + tr) / 2;
		if(tm >= k){
			update(node*2, tl, tm, k, x);
		}
		else{
			update(node*2+1, tm+1, tr, k, x);
		}
		tree[node] = max(tree[node*2], tree[node*2+1]);
	}
	int quer(int node, int tl, int tr, int l, int r){
		if(tl == l && tr == r)return tree[node];
		if(tl > r || tr < l)return 0;
		int tm = (tl + tr) / 2;
		return max(quer(node*2, tl, tm, l, min(r, tm)), quer(node*2+1, tm+1, tr, max(l, tm+1), r));
	}
	maxsegtree(vi &a){
		n = a.size();
		tree.resize(4*n+5);
		build(1, 0, n-1, a);
	}
	
};
signed main(){
	ios::sync_with_stdio(false);
	cin.tie(NULL);
	//ifstream cin(".in");
	//ofstream cout(".out");
	in2(n,d);
	vin(v,n);
	minsegtree t = minsegtree(v);
	vi m(n);
	FOR(i, d, n){
		m[i] = t.quer(i-d, i);
	}
	// vout(m);
	maxsegtree u = maxsegtree(m);
	
	vi r(n);
	f0r(i,n){
		r[i] = u.firsthigher(1, 0, n-1, i+d, n-1, v[i]);
	}
	f0r(i,n){
		if(r[i] == -1)r[i] = n;
	}
	// vout(r);
	
	vpii q;
	f0r(i,n){
		q.pb(mp(v[i], -i));
	}
	sort(rall(q));
	
	vi dp(n,-4e18);
	
	maxsegtree tt = maxsegtree(dp);
	f0r(i,n){
		int dex = -q[i].second;
		int ne = max(0LL, tt.quer(1, 0, n-1, dex+1, r[dex]-1)) + 1;
		dp[dex] = ne;
		// dout2(dex, ne);
		tt.update(1, 0, n-1, dex, ne);
	}
	out(*max_element(all(dp)));
	
}

• Subtask 1: 14 / 14
• Subtask 2: 0 / 14
• Subtask 3: 0 / 20
• Subtask 4: 0 / 12
• Subtask 5: 5 / 5
• Subtask 6: 0 / 35