oj.uz

Submission #1046918

# Submission time Handle Problem Language Result Execution time Memory
1046918 2024-08-07T06:18:10 Z vjudge1 Index (COCI21_index) C++17
110 / 110
 515 ms 134328 KB 
#include<bits/stdc++.h>
#define ll long long
#define MOD 1000000007
#define all(x) x.begin(),x.end()
#define ff first
#define ss second
#define pb push_back
#define fast ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);

using namespace std;

const int N=200000;

struct Node{
	int val=0;
	Node *l=NULL,*r=NULL;
};

void build(Node *node,int l,int r){
	if(l==r)return;
	int mid=(l+r)/2;
	node->l=new Node;
	node->r=new Node;
	build(node->l,l,mid);
	build(node->r,mid+1,r);
	return;
}

void update(Node *node,Node *pre,int l,int r,int x,int y){
	if(l==r){
		node->val=y;
		return;
	}
	int mid=(l+r)/2;
	if(x<=mid){
		node->r=pre->r;
		node->l=new Node;
		update(node->l,pre->l,l,mid,x,y);
	}
	else{
		node->l=pre->l;
		node->r=new Node;
		update(node->r,pre->r,mid+1,r,x,y);
	}
	node->val=node->l->val+node->r->val;
	return;
}

int query(Node *node,Node *pre,int l,int r,int k){
	if(l==r){
		return l;
	}
	int mid=(l+r)/2;
	if(node->r->val-pre->r->val+k>=mid+1){
		return query(node->r,pre->r,mid+1,r,k);
	}
	return query(node->l,pre->l,l,mid,k+node->r->val-pre->r->val);
}

int32_t main(){
	fast;
	int n,q;
	cin>>n>>q;
	vector<int>arr(n+1);
	for(int i=1;i<=n;i++){
		cin>>arr[i];
	}
	vector<Node*>pre(n+1);
	pre[0]=new Node;
	build(pre[0],1,N);
	vector<int>cnt(N+1);
	for(int i=1;i<=n;i++){
		cnt[arr[i]]++;
		pre[i]=new Node;
		update(pre[i],pre[i-1],1,N,arr[i],cnt[arr[i]]);
	}
	while(q--){
		int l,r;
		cin>>l>>r;
		cout<<query(pre[r],pre[l-1],1,N,0)<<endl;
	}
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 14172 KB Output is correct
2 Correct 14 ms 14304 KB Output is correct
3 Correct 11 ms 14168 KB Output is correct
4 Correct 18 ms 14340 KB Output is correct
5 Correct 11 ms 14276 KB Output is correct
6 Correct 11 ms 14168 KB Output is correct
7 Correct 11 ms 14236 KB Output is correct
8 Correct 11 ms 14172 KB Output is correct
9 Correct 13 ms 14172 KB Output is correct
10 Correct 11 ms 14424 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 14172 KB Output is correct
2 Correct 14 ms 14304 KB Output is correct
3 Correct 11 ms 14168 KB Output is correct
4 Correct 18 ms 14340 KB Output is correct
5 Correct 11 ms 14276 KB Output is correct
6 Correct 11 ms 14168 KB Output is correct
7 Correct 11 ms 14236 KB Output is correct
8 Correct 11 ms 14172 KB Output is correct
9 Correct 13 ms 14172 KB Output is correct
10 Correct 11 ms 14424 KB Output is correct
11 Correct 130 ms 44116 KB Output is correct
12 Correct 102 ms 43796 KB Output is correct
13 Correct 104 ms 43860 KB Output is correct
14 Correct 110 ms 43724 KB Output is correct
15 Correct 105 ms 43860 KB Output is correct
16 Correct 113 ms 43740 KB Output is correct
17 Correct 109 ms 43780 KB Output is correct
18 Correct 102 ms 43704 KB Output is correct
19 Correct 102 ms 43856 KB Output is correct
20 Correct 102 ms 43868 KB Output is correct

Subtask #3
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 14172 KB Output is correct
2 Correct 14 ms 14304 KB Output is correct
3 Correct 11 ms 14168 KB Output is correct
4 Correct 18 ms 14340 KB Output is correct
5 Correct 11 ms 14276 KB Output is correct
6 Correct 11 ms 14168 KB Output is correct
7 Correct 11 ms 14236 KB Output is correct
8 Correct 11 ms 14172 KB Output is correct
9 Correct 13 ms 14172 KB Output is correct
10 Correct 11 ms 14424 KB Output is correct
11 Correct 130 ms 44116 KB Output is correct
12 Correct 102 ms 43796 KB Output is correct
13 Correct 104 ms 43860 KB Output is correct
14 Correct 110 ms 43724 KB Output is correct
15 Correct 105 ms 43860 KB Output is correct
16 Correct 113 ms 43740 KB Output is correct
17 Correct 109 ms 43780 KB Output is correct
18 Correct 102 ms 43704 KB Output is correct
19 Correct 102 ms 43856 KB Output is correct
20 Correct 102 ms 43868 KB Output is correct
21 Correct 455 ms 134228 KB Output is correct
22 Correct 497 ms 134224 KB Output is correct
23 Correct 458 ms 134300 KB Output is correct
24 Correct 453 ms 134228 KB Output is correct
25 Correct 501 ms 134224 KB Output is correct
26 Correct 496 ms 134180 KB Output is correct
27 Correct 515 ms 134204 KB Output is correct
28 Correct 473 ms 134328 KB Output is correct
29 Correct 456 ms 134224 KB Output is correct
30 Correct 452 ms 134224 KB Output is correct