Submission #1148468

#	Time	Username	Problem	Language	Result	Execution time	Memory
1148468		SyedSohaib_123	Bouquet (EGOI24_bouquet)	C++20	100 / 100	89 ms	23332 KiB

Main

#include <bits/stdc++.h>

using namespace std;

#define append push_back
#define int long long

const int N=4e5+10,LG=21;
int mod=998244353;

vector<pair<int,int>>g[N];
int dp[N],val[N],tree[N<<2];

int get(int l,int r,int s,int a,int b){
    if(r<a or l>b) return 0;
    if(a<=l and r<=b) return tree[s];int m=(l+r)>>1;
    return max(get(l,m,s*2,a,b),get(m+1,r,s*2+1,a,b));
}

void upd(int l,int r,int s,int a,int b){
    if(r<a or l>a) return;
    if(l==r){
        tree[s]=b;return;
    }
    int m=(l+r)>>1;
    upd(l,m,s*2,a,b);
    upd(m+1,r,s*2+1,a,b);
    tree[s]=max(tree[s*2],tree[s*2+1]);
}

void solve(int tst){
    int n;
    cin>>n;
    int ans=0;
    for(int i=1;i<=n;i++) dp[i]=1;
    for(int i=1;i<=n;i++){
        int l,r;
        cin>>l>>r;
        for(auto [ind,v]:g[i]){
            val[ind]=v;
            upd(1,n,1,ind,v);
        }
        int x=max(0ll,i-l-1),y=i+1+r;
        dp[i]=get(1,n,1,1,x)+1;
        if(y<=n) g[y].append({i,dp[i]});
        ans=max(ans,dp[i]);
        val[i]=dp[i];
    }
    cout<<ans<<endl;
}

signed main(){
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    int t = 1;
    // cin >> t;
    for(int i=1;i<=t;i++)
        solve(i);
}

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