Submission #1214823

#	Time	Username	Problem	Language	Result	Execution time	Memory
1214823		biank	Bouquet (EGOI24_bouquet)	C++20	100 / 100	42 ms	5052 KiB

Main

#include <bits/stdc++.h>

using namespace std;

#define forn(i,n) for(int i=0;i<int(n);i++)
#define forsn(i,s,n) for(int i=int(s);i<int(n);i++)
#define dforn(i,n) for(int i=int(n)-1;i>=0;i--)
#define dforsn(i,s,n) for(int i=int(n)-1;i>=int(s);i--)
#define fst first
#define snd second
#define pb push_back
#define eb emplace_back
#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()

typedef long long ll;
typedef vector<ll> vll;
typedef vector<int> vi;
typedef pair<int,int> ii;

const int N=2e5+9;

int ft[N];

void upd(int p, int v){
    for(p++;p<N;p+=p&-p) ft[p]=max(ft[p],v);
}

int query(int p){
    int res=0;
    for(;p>0;p-=p&-p) res=max(res,ft[p]);
    return res;
}

int main(){
    ios::sync_with_stdio(0);
    cin.tie(0);
    
    int n;
    cin>>n;
    vi l(n),r(n);
    forn(i,n) cin>>l[i]>>r[i];
    priority_queue<ii,vector<ii>,greater<ii>> pq;
    vi dp(n);
    forn(i,n){
        while(!pq.empty()&&pq.top().fst<i){
            int j=pq.top().snd;
            pq.pop();
            upd(j,dp[j]);
        }
        dp[i]=query(i-l[i])+1;
        pq.emplace(i+r[i],i);
    }
    cout<<*max_element(all(dp))<<'\n';
    
    return 0;
}

• Subtask 1: 8 / 8
• Subtask 2: 16 / 16
• Subtask 3: 28 / 28
• Subtask 4: 18 / 18
• Subtask 5: 30 / 30