Submission #1120942

#	Time	Username	Problem	Language	Result	Execution time	Memory
1120942		ezzzay	Bouquet (EGOI24_bouquet)	C++14	70 / 100	163 ms	34880 KiB

Main

#include<bits/stdc++.h>
using namespace std;
#define itn long long
#define int long long
#define ff first
#define ss second
#define pb push_back
const int N=3e5+5;
int l[N],r[N];
int dp[N];
int st[4*N];
void update(int node, int L, int R, int idx, int val){
    if(L==R){
        st[node]=val;
        return;
    }
    int mid=(L+R)/2;
    if(L<=idx and idx<=mid)update(node*2,L,mid,idx,val);
    else update(node*2+1,mid+1,R,idx,val);
    st[node]=max(st[node*2],st[node*2+1]);
}
int find(int node, int L, int R, int l, int r){
    if(l<1 or r<1)return 0;
    if(l<=L and R<=r) return st[node];
    if (l > R or r < L) return 0;
    int mid=(L+R)/2;
    return  max(find(2*node,L,mid,l,r),find(2*node+1,mid+1,R,l,r));
}
vector<int>pst[N];
signed main(){
    int n;
    cin>>n;
    for(int i=1;i<=n;i++){
        cin>>l[i]>>r[i];
    }
    int ans=0;
    for(int i=1;i<=n;i++){
        for(auto a:pst[i]){
            update(1,1,n,a,dp[a]);
        }
        dp[i]=find(1,1,n,1,i-l[i]-1)+1;
        pst[i+r[i]+1].pb(i);
        ans=max(ans,dp[i]);
    }
    
    cout<<ans;
    
    
}

• Subtask 1: 8 / 8
• Subtask 2: 16 / 16
• Subtask 3: 28 / 28
• Subtask 4: 18 / 18
• Subtask 5: 0 / 30