Submission #535685

#	Time	Username	Problem	Language	Result	Execution time	Memory
535685		crystaalroo	Financial Report (JOI21_financial)	C++17	100 / 100	411 ms	29892 KiB

Main

#include <bits/stdc++.h>
#define f first
#define s second
#define fore(i,a,b) for(int i = (a), ThxMK = (b); i < ThxMK; ++i)
#define pb push_back
#define all(s) begin(s), end(s)
#define _ ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define sz(s) int(s.size())
#define ENDL '\n'
#define vv(type, name, h, ...) vector<vector<type>> name(h, vector<type>(__VA_ARGS__))
#define vvv(type, name, h, w, ...) vector<vector<vector<type>>> name(h, vector<vector<type>>(w, vector<type>(__VA_ARGS__)))
using namespace std;
 
long long gcd(long long a, long long b){ return b? gcd(b, a%b) : a; }
long long lcm(long long a, long long b){ return (!a or !b)? 0 : a * b / gcd(a,b); } 
long long  poww(long long  a, long long b){
	long long res = 1;
	while(b){ 
		if(b%2) res = res * a ; 
		a = a * a;  b>>=1;
	} return res;
}
 
// mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
// int rnd(int n){return uniform_int_distribution<int>(0, n-1)(rng);}
 
template <typename T> static constexpr T inf = numeric_limits<T>::max() / 2;
template<class t,class u>bool mmax(t&a,u b){if(a<b)a=b;return a<b;}
template<class t,class u>bool mmin(t&a,u b){if(b<a)a=b;return b<a;}
template<class t> using vc=vector<t>;
template<class t> using vvc=vc<vc<t>>;
using li = long long;
using vi = vc<int>;
using ii = pair<int,int>;
//  ('-')7
 
struct ST{
	#define mid (l+r)/2
	#define left(u) (u+1)
	#define right(u) (u+((mid-l+1)<<1))
	vi st;
	ST(int n):st(2*n,0){}
	int f(int a, int b){
		return max(a,b);
	}
 
	void update(int u, int l, int r, int pos, int val){
		if(l>r)return;
		if(l==r){st[u]=val; return;}
		if(pos<=mid)update(left(u),l,mid,pos,val);
		else update(right(u),mid+1,r,pos,val);
		st[u]=f(st[left(u)],st[right(u)]);
	}
 
	int query(int u, int l, int r, int ll, int rr){
		if(l>r or rr<l or ll>r)return 0;
		if(l>=ll and r<=rr)return st[u];
		return f(query(left(u),l,mid,ll,rr),query(right(u),mid+1,r,ll,rr));
	}
 
};
 
int main(){_
 
	auto solve=[&](){
		int n,m; cin>>n>>m;
		vi v(n);
		fore(i,0,n)cin>>v[i];
		vc<ii>ord(n);
		fore(i,0,n)ord[i]={v[i],-i};
		sort(all(ord),greater<ii>());
		ST st(n);
		vi g(n,-1);
		vi r(n,n-1);
		multiset<int>s;
		fore(i,0,n){
			s.insert(v[i]);
			if(sz(s)==m){
				g[i]=*s.begin();
				s.erase(s.lower_bound(v[i-m+1]));
			}
		}
		//fore(i,0,n)cout<<g[i]<<" ";cout<<ENDL;
		priority_queue<ii,vc<ii>,greater<ii>>q;
		fore(i,0,n){
			while(i+m-1<n and !q.empty() and q.top().f<g[i+m-1]){
				r[q.top().s]=i+m-1;
				q.pop();
			}
			q.push({v[i],i});
		}
		//fore(i,0,n)cout<<r[i]<<" ";
		vi dp(n,1);
		fore(j,0,n){
			int i = -ord[j].s; 
			dp[i]=max(st.query(0,0,n-1,i+1,r[i])+1,dp[i]);
			//cout<<dp[i]<<" ";
			st.update(0,0,n-1,i,dp[i]);
		}
		
		int mx = 1;
		fore(i,0,n)mx = max(mx,dp[i]);
		cout<<mx<<ENDL;
	};
	//int t; cin>>t; while(t--)
	solve();
}

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