oj.uz

Submission #251069

# Submission time Handle Problem Language Result Execution time Memory
251069 2020-07-20T05:36:20 Z kshitij_sodani Bubble Sort 2 (JOI18_bubblesort2) C++14
38 / 100
 2286 ms 406648 KB 
#include <bits/stdc++.h>
using namespace std;
typedef int64_t llo;
#define mp make_pair
#define pb push_back
#define a first 
#define b second
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/pb_ds/assoc_container.hpp>

using namespace __gnu_pbds;
#define ord tree<pair<int,int>,null_type,less<pair<int,int>>,rb_tree_tag,tree_order_statistics_node_update>

#include "bubblesort2.h"
const int ss=3200;
int ind2[500001];//current index of element i
vector<pair<int,int>> tt[500001/ss+1];
int ind[1000001];//index of each n+q-1 in seg tree
int lazy[4000001];
int tree4[4000001];
ord tree2[4000001];
int ac[500001];

void build(int no,int l,int r){
	if(l==r){
		tree2[no].insert({ac[l],ind[l]});
	}
	else{
		int mid=(l+r)/2;
		build(no*2+1,l,mid);
		build(no*2+2,mid+1,r);
		tree2[no]=tree2[no*2+1];
		for(auto j:tree2[no*2+2]){
			tree2[no].insert(j);
		}
	}
}

int query(int no,int l,int r,int aa,int bb,int val){
	if(r<aa or l>bb){
		return 0;
	}
	if(aa<=l and r<=bb){
		return tree2[no].size()-tree2[no].order_of_key({val+1,0});
	}
	else{
		int mid=(l+r)/2;
		return query(no*2+1,l,mid,aa,bb,val)+query(no*2+2,mid+1,r,aa,bb,val);
	}
}
void update3(int no,int l,int r,int ind5,pair<int,int> old,pair<int,int> nn){
	if(r<ind5 or l>ind5){
		return;
	}
	tree2[no].erase(old);
	tree2[no].insert(nn);
	if(l<r){
		int mid=(l+r)/2;
		update3(no*2+1,l,mid,ind5,old,nn);
		update3(no*2+2,mid+1,r,ind5,old,nn);
	}
}
void update(int no,int l,int r,int aa,int bb,int val){
	tree4[no]+=lazy[no];
	if(l<r){
		lazy[no*2+1]+=lazy[no];
		lazy[no*2+2]+=lazy[no];
	}
	lazy[no]=0;
	if(r<aa or l>bb){
		return;
	}
	if(aa<=l and r<=bb){
		tree4[no]+=val;
		if(l<r){
			lazy[no*2+1]+=val;
			lazy[no*2+2]+=val;
		}
	}
	else{
		int mid=(l+r)/2;
		update(no*2+1,l,mid,aa,bb,val);
		update(no*2+2,mid+1,r,aa,bb,val);
		tree4[no]=max(tree4[no*2+1],tree4[no*2+2]);
	}
}
void update2(int no,int l,int r,int aa,int val){
	tree4[no]+=lazy[no];
	if(l<r){
		lazy[no*2+1]+=lazy[no];
		lazy[no*2+2]+=lazy[no];
	}
	lazy[no]=0;
	if(r<aa or l>aa){
		return;
	}
	if(l==r){
		tree4[no]=val;
	}
	else{
		int mid=(l+r)/2;
		update2(no*2+1,l,mid,aa,val);
		update2(no*2+2,mid+1,r,aa,val);
		tree4[no]=max(tree4[no*2+1],tree4[no*2+2]);
	}
}
std::vector<int> countScans(std::vector<int> it,std::vector<int> X,std::vector<int> V){
	int q=X.size();
	int n=it.size();


	for(int i=0;i<n;i++){
		ac[i]=it[i];
	}
	


	//sqrt blocks process
	for(int i=0;i<n;i++){
		tt[i/ss].pb({it[i],i});
	}
	for(int i=0;i<q;i++){
		tt[X[i]/ss].pb({V[i],i+n});
	}
	for(int i=0;i<=(n-1)/ss;i++){
		sort(tt[i].begin(),tt[i].end());
	}
	//end

	//process index
	int co=-1;
	for(int i=0;i<=(n-1)/ss;i++){
		for(auto j:tt[i]){
			co+=1;
			ind[j.b]=co;
			if(j.b<n){
				ind2[j.b]=co;
			}
		}
	}
	build(0,0,n-1);
	//end
	for(int i=0;i<4*(n+q);i++){
		tree4[i]=-1e9;
	}
//	memset(tree4,-1e9,sizeof(tree4));


	//initial tree
	ord kk;
	for(int i=0;i<n;i++){
		int cur=kk.size()-kk.order_of_key({it[i]+1,0});
		update2(0,0,n+q-1,ind[i],cur);
		kk.insert({it[i],i});

		//cout<<i<<","<<cur<<endl;
	}
	//end


	vector<int> ans;
/*	for(int i=0;i<n+q;i++){
		cout<<ind[i]<<":";
	}
	cout<<endl;*/
	//pre-process with pbds
	for(int ii=0;ii<q;ii++){
		int ind3=X[ii];
		int val=V[ii];
		int l,r,cc;

		update2(0,0,n+q-1,ind2[ind3],-1e9);
		//remove pairs from mst
		pair<int,int> old={it[ind3],ind2[ind3]};
		pair<int,int> nn={val,ind[ii+n]};
		update3(0,0,n-1,ind3,old,nn);
		// update answer of current index
		int x=0;
		if(ind3>0){
			x=query(0,0,n-1,0,ind3-1,val);
		}
	//	cout<<x<<endl;
		update2(0,0,n+q-1,ind[ii+n],x);
		//end


		ind2[ind3]=ind[ii+n];

		int kk=0;
		if(val<it[ind3]){
			l=val;
			r=it[ind3]-1;
			cc=-1;
		}
		else if(val>it[ind3]){
			l=it[ind3];
			r=val-1;
			cc=1;
		}
		else{
			continue;
		}
	//	cout<<l<<","<<r<<","<<cc<<endl;


		it[ind3]=val;

		for(int i=ind3/ss;i<=(n-1)/ss;i++){
			if(i==ind3/ss){
				for(int j=ind3+1;j<n;j++){
					if(j/ss>i){
						break;
					}
					if(it[j]>=l and it[j]<=r){
						update(0,0,n+q-1,ind2[j],ind2[j],cc);
					}
				}
				//for each index check individually and update
			}
			else{
				pair<int,int> kc={l,0};
				int low=lower_bound(tt[i].begin(),tt[i].end(),kc)-tt[i].begin();
				if(low==tt[i].size()){
					continue;
				}
				kc.a=r+1;
				int rr=lower_bound(tt[i].begin(),tt[i].end(),kc)-tt[i].begin();
				if(rr==low){
					continue;
				}
				update(0,0,n+q-1,ind[tt[i][low].b],ind[tt[i][low].b]+rr-low-1,cc);
				//binary search to find index in each block and update in seg tree
			}
		}
		ans.pb(tree4[0]);
	}
/*	for(auto j:ans){
		cout<<j<<",";
	}
	cout<<endl;*/
	return ans;
}

//#define endl '\n'

/*int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	int nn,qq;
	cin>>nn>>qq;
	int pp;
	vector<int> ac;
	vector<int> bc;
	vector<int> dc;

	for(int i=0;i<nn;i++){
		cin>>pp;
		ac.pb(pp);
	}
	for(int i=0;i<qq;i++){
		cin>>pp;
		bc.pb(pp);
		cin>>pp;
		dc.pb(pp);
	}
	countScans(ac,bc,dc);
 
	return 0;
}*/

Compilation message

bubblesort2.cpp: In function 'std::vector<int> countScans(std::vector<int>, std::vector<int>, std::vector<int>)':
bubblesort2.cpp:223:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     if(low==tt[i].size()){
        ~~~^~~~~~~~~~~~~~
bubblesort2.cpp:189:7: warning: unused variable 'kk' [-Wunused-variable]
   int kk=0;
       ^~

Subtask #1
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 323 ms 376464 KB Output is correct
2 Correct 338 ms 376824 KB Output is correct
3 Correct 462 ms 377980 KB Output is correct
4 Correct 461 ms 378224 KB Output is correct
5 Correct 434 ms 377912 KB Output is correct
6 Correct 438 ms 377976 KB Output is correct
7 Correct 450 ms 377920 KB Output is correct
8 Correct 441 ms 377948 KB Output is correct
9 Correct 434 ms 377976 KB Output is correct
10 Correct 465 ms 377976 KB Output is correct
11 Correct 482 ms 378012 KB Output is correct
12 Correct 456 ms 377976 KB Output is correct
13 Correct 506 ms 378104 KB Output is correct
14 Correct 475 ms 378092 KB Output is correct
15 Correct 478 ms 377976 KB Output is correct
16 Correct 505 ms 377976 KB Output is correct
17 Correct 516 ms 378104 KB Output is correct
18 Correct 500 ms 377976 KB Output is correct

Subtask #2
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 323 ms 376464 KB Output is correct
2 Correct 338 ms 376824 KB Output is correct
3 Correct 462 ms 377980 KB Output is correct
4 Correct 461 ms 378224 KB Output is correct
5 Correct 434 ms 377912 KB Output is correct
6 Correct 438 ms 377976 KB Output is correct
7 Correct 450 ms 377920 KB Output is correct
8 Correct 441 ms 377948 KB Output is correct
9 Correct 434 ms 377976 KB Output is correct
10 Correct 465 ms 377976 KB Output is correct
11 Correct 482 ms 378012 KB Output is correct
12 Correct 456 ms 377976 KB Output is correct
13 Correct 506 ms 378104 KB Output is correct
14 Correct 475 ms 378092 KB Output is correct
15 Correct 478 ms 377976 KB Output is correct
16 Correct 505 ms 377976 KB Output is correct
17 Correct 516 ms 378104 KB Output is correct
18 Correct 500 ms 377976 KB Output is correct
19 Correct 1275 ms 383696 KB Output is correct
20 Correct 1487 ms 384620 KB Output is correct
21 Correct 1310 ms 384608 KB Output is correct
22 Correct 1505 ms 384632 KB Output is correct
23 Correct 1838 ms 384800 KB Output is correct
24 Correct 1833 ms 384752 KB Output is correct
25 Correct 2050 ms 384632 KB Output is correct
26 Correct 2165 ms 384524 KB Output is correct
27 Correct 2286 ms 384616 KB Output is correct
28 Correct 2180 ms 384808 KB Output is correct

Subtask #3
0 / 22.0

# Verdict Execution time Memory Grader output
1 Incorrect 792 ms 406648 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 323 ms 376464 KB Output is correct
2 Correct 338 ms 376824 KB Output is correct
3 Correct 462 ms 377980 KB Output is correct
4 Correct 461 ms 378224 KB Output is correct
5 Correct 434 ms 377912 KB Output is correct
6 Correct 438 ms 377976 KB Output is correct
7 Correct 450 ms 377920 KB Output is correct
8 Correct 441 ms 377948 KB Output is correct
9 Correct 434 ms 377976 KB Output is correct
10 Correct 465 ms 377976 KB Output is correct
11 Correct 482 ms 378012 KB Output is correct
12 Correct 456 ms 377976 KB Output is correct
13 Correct 506 ms 378104 KB Output is correct
14 Correct 475 ms 378092 KB Output is correct
15 Correct 478 ms 377976 KB Output is correct
16 Correct 505 ms 377976 KB Output is correct
17 Correct 516 ms 378104 KB Output is correct
18 Correct 500 ms 377976 KB Output is correct
19 Correct 1275 ms 383696 KB Output is correct
20 Correct 1487 ms 384620 KB Output is correct
21 Correct 1310 ms 384608 KB Output is correct
22 Correct 1505 ms 384632 KB Output is correct
23 Correct 1838 ms 384800 KB Output is correct
24 Correct 1833 ms 384752 KB Output is correct
25 Correct 2050 ms 384632 KB Output is correct
26 Correct 2165 ms 384524 KB Output is correct
27 Correct 2286 ms 384616 KB Output is correct
28 Correct 2180 ms 384808 KB Output is correct
29 Incorrect 792 ms 406648 KB Output isn't correct
30 Halted 0 ms 0 KB -