oj.uz

Submission #251081

# Submission time Handle Problem Language Result Execution time Memory
251081 2020-07-20T05:55:50 Z kshitij_sodani Bubble Sort 2 (JOI18_bubblesort2) C++14
60 / 100
 9000 ms 398088 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=1000;
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[2000001];
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){
	if(lazy[no]>0 or lazy[no]<0){
		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){
	if(lazy[no]>0 or lazy[no]<0){
		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){
			/*for(int i=0;i<ind3;i++){
				if(it[i]>val){
					x+=1;
				}
			}*/
			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{
			ans.pb(tree4[0]);
			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:232:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     if(low==tt[i].size()){
        ~~~^~~~~~~~~~~~~~
bubblesort2.cpp:196:7: warning: unused variable 'kk' [-Wunused-variable]
   int kk=0;
       ^~

Subtask #1
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 171 ms 188664 KB Output is correct
2 Correct 191 ms 188792 KB Output is correct
3 Correct 245 ms 190072 KB Output is correct
4 Correct 248 ms 190072 KB Output is correct
5 Correct 224 ms 190072 KB Output is correct
6 Correct 232 ms 190072 KB Output is correct
7 Correct 242 ms 190072 KB Output is correct
8 Correct 250 ms 190072 KB Output is correct
9 Correct 225 ms 190080 KB Output is correct
10 Correct 286 ms 190072 KB Output is correct
11 Correct 273 ms 190204 KB Output is correct
12 Correct 321 ms 190020 KB Output is correct
13 Correct 335 ms 190072 KB Output is correct
14 Correct 320 ms 190072 KB Output is correct
15 Correct 313 ms 190200 KB Output is correct
16 Correct 320 ms 190200 KB Output is correct
17 Correct 340 ms 190200 KB Output is correct
18 Correct 334 ms 190072 KB Output is correct

Subtask #2
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 171 ms 188664 KB Output is correct
2 Correct 191 ms 188792 KB Output is correct
3 Correct 245 ms 190072 KB Output is correct
4 Correct 248 ms 190072 KB Output is correct
5 Correct 224 ms 190072 KB Output is correct
6 Correct 232 ms 190072 KB Output is correct
7 Correct 242 ms 190072 KB Output is correct
8 Correct 250 ms 190072 KB Output is correct
9 Correct 225 ms 190080 KB Output is correct
10 Correct 286 ms 190072 KB Output is correct
11 Correct 273 ms 190204 KB Output is correct
12 Correct 321 ms 190020 KB Output is correct
13 Correct 335 ms 190072 KB Output is correct
14 Correct 320 ms 190072 KB Output is correct
15 Correct 313 ms 190200 KB Output is correct
16 Correct 320 ms 190200 KB Output is correct
17 Correct 340 ms 190200 KB Output is correct
18 Correct 334 ms 190072 KB Output is correct
19 Correct 571 ms 195788 KB Output is correct
20 Correct 610 ms 196728 KB Output is correct
21 Correct 534 ms 196728 KB Output is correct
22 Correct 644 ms 196600 KB Output is correct
23 Correct 781 ms 196728 KB Output is correct
24 Correct 863 ms 196600 KB Output is correct
25 Correct 928 ms 196744 KB Output is correct
26 Correct 892 ms 196728 KB Output is correct
27 Correct 1002 ms 196968 KB Output is correct
28 Correct 1029 ms 196576 KB Output is correct

Subtask #3
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 433 ms 219000 KB Output is correct
2 Correct 2711 ms 235332 KB Output is correct
3 Correct 6135 ms 249416 KB Output is correct
4 Correct 6135 ms 249296 KB Output is correct
5 Correct 5689 ms 249492 KB Output is correct
6 Correct 5330 ms 249708 KB Output is correct
7 Correct 5480 ms 249680 KB Output is correct
8 Correct 5624 ms 249380 KB Output is correct
9 Correct 5740 ms 249328 KB Output is correct
10 Correct 1490 ms 248592 KB Output is correct
11 Correct 1778 ms 248744 KB Output is correct
12 Correct 2358 ms 248692 KB Output is correct
13 Correct 1335 ms 248656 KB Output is correct
14 Correct 1620 ms 248772 KB Output is correct
15 Correct 1258 ms 248688 KB Output is correct
16 Correct 1094 ms 248580 KB Output is correct
17 Correct 1105 ms 248560 KB Output is correct
18 Correct 1074 ms 248432 KB Output is correct

Subtask #4
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 171 ms 188664 KB Output is correct
2 Correct 191 ms 188792 KB Output is correct
3 Correct 245 ms 190072 KB Output is correct
4 Correct 248 ms 190072 KB Output is correct
5 Correct 224 ms 190072 KB Output is correct
6 Correct 232 ms 190072 KB Output is correct
7 Correct 242 ms 190072 KB Output is correct
8 Correct 250 ms 190072 KB Output is correct
9 Correct 225 ms 190080 KB Output is correct
10 Correct 286 ms 190072 KB Output is correct
11 Correct 273 ms 190204 KB Output is correct
12 Correct 321 ms 190020 KB Output is correct
13 Correct 335 ms 190072 KB Output is correct
14 Correct 320 ms 190072 KB Output is correct
15 Correct 313 ms 190200 KB Output is correct
16 Correct 320 ms 190200 KB Output is correct
17 Correct 340 ms 190200 KB Output is correct
18 Correct 334 ms 190072 KB Output is correct
19 Correct 571 ms 195788 KB Output is correct
20 Correct 610 ms 196728 KB Output is correct
21 Correct 534 ms 196728 KB Output is correct
22 Correct 644 ms 196600 KB Output is correct
23 Correct 781 ms 196728 KB Output is correct
24 Correct 863 ms 196600 KB Output is correct
25 Correct 928 ms 196744 KB Output is correct
26 Correct 892 ms 196728 KB Output is correct
27 Correct 1002 ms 196968 KB Output is correct
28 Correct 1029 ms 196576 KB Output is correct
29 Correct 433 ms 219000 KB Output is correct
30 Correct 2711 ms 235332 KB Output is correct
31 Correct 6135 ms 249416 KB Output is correct
32 Correct 6135 ms 249296 KB Output is correct
33 Correct 5689 ms 249492 KB Output is correct
34 Correct 5330 ms 249708 KB Output is correct
35 Correct 5480 ms 249680 KB Output is correct
36 Correct 5624 ms 249380 KB Output is correct
37 Correct 5740 ms 249328 KB Output is correct
38 Correct 1490 ms 248592 KB Output is correct
39 Correct 1778 ms 248744 KB Output is correct
40 Correct 2358 ms 248692 KB Output is correct
41 Correct 1335 ms 248656 KB Output is correct
42 Correct 1620 ms 248772 KB Output is correct
43 Correct 1258 ms 248688 KB Output is correct
44 Correct 1094 ms 248580 KB Output is correct
45 Correct 1105 ms 248560 KB Output is correct
46 Correct 1074 ms 248432 KB Output is correct
47 Execution timed out 9038 ms 398088 KB Time limit exceeded
48 Halted 0 ms 0 KB -