oj.uz

Submission #785914

# Submission time Handle Problem Language Result Execution time Memory
785914 2023-07-17T18:46:59 Z kshitij_sodani Abduction 2 (JOI17_abduction2) C++14
44 / 100
 3604 ms 9840 KB 
#include <bits/stdc++.h>
using namespace std;
#define a first
#define b second
#define pb push_back
typedef long long llo;
#define endl '\n'
 void setIO(string name) {
	ios_base::sync_with_stdio(0); cin.tie(0);
	freopen((name+".txt").c_str(),"r",stdin);
//	freopen((name+".out").c_str(),"w",stdout);
}
llo aa[500001];
llo bb[500001];
llo n,m,q;
vector<pair<pair<llo,llo>,llo>> ss;
set<pair<llo,llo>> xx[2];
llo dp[500001][2];
llo solve(llo i,llo j){
//	cout<<i<<",,"<<j<<endl;
	llo ind=-1;
	llo ind2=-1;
	for(llo ii=0;ii<ss.size();ii++){
		if(ss[ii].a.b==i and ss[ii].b==0){
			ind=ii;
		}
		if(ss[ii].a.b==j and ss[ii].b==1){
			ind2=ii;
		}
	}
	xx[0].clear();
	xx[1].clear();
	pair<pair<llo,llo>,llo> cur={{i,i},0};

	pair<pair<llo,llo>,llo> cur2={{j,j},1};
	for(llo jj=max(ind,ind2)+1;jj<ss.size();jj++){
		if(ss[jj].b==0){
			xx[0].insert({ss[jj].a.b,jj});
		}
		else{
			xx[1].insert({ss[jj].a.b,jj});
		}
	}
	//cout<<ind<<":::"<<ind2<<endl;
	
	llo ok=0;
	if(ind>ind2){
		ok=1;
		swap(cur,cur2);
		swap(ind,ind2);
	}
	llo l=ind2;
	vector<pair<llo,llo>> ans;
	vector<pair<llo,llo>> ans2;
	ans.pb({cur.a.a,cur.a.b});
	ans2.pb({ind,ind});
	ans.pb({cur2.a.a,cur2.a.b});
	ans2.pb({ind2,ind2});
	//cout<<cur.b<<"::"<<cur2.b<<endl;
	/*llo ka=0;
	if(i==1820 and j==1935){
	    ka=1;
	}*/
	while(true){
	   // assert(cur.b-cur2.b==1);
	  //  cout<<cur.b<<",,"<<cur2.b<<","<<(ans.size()%2)<<endl;
		pair<llo,llo> le={-1,-1};//pos in original,pos in ss
		pair<llo,llo> re={-1,-1};
    	while(l<min(ans2.back().a,ans2.back().b)){
    		int jj=l+1;
    		xx[ss[jj].b].erase({ss[jj].a.b,jj});
    		l++;
    	}

		auto j=xx[cur.b].lower_bound({max(cur.a.b,cur.a.a)+1,-1});
		if(j!=xx[cur.b].end()){
			re=(*j);
		}
		auto jj=xx[cur.b].lower_bound({min(cur.a.a,cur.a.b),-1});
		if(jj!=xx[cur.b].begin()){
			jj--;
			le=(*jj);
		}
	  /*  if(cur.a.a==1936){
	        cout<<le.a<<"<"<<le.b<<endl;
	    }*/	
		if(le.a==-1 and re.a==-1){
			break;
		}
		if(le.a==-1){
			swap(le,re);
		}
		else{
			if(le.b>re.b){
				swap(le,re);
			}
		}
		
		if(le.b>=0 and le.b<max(ans2.back().a,ans2.back().b)){
			pair<llo,llo> za=ans.back();
			pair<llo,llo> za2=ans2.back();
/*			cout<<za2.a<<","<<za2.b<<endl;
			cout<<le.b<<endl;
			cout<<ans2.size()<<"?"<<endl;*/
			ans.pop_back();;
			ans2.pop_back();
			if(le.b<za2.a){
				assert(le.b>za2.b);
				ans.pb({za.b,za.b});
				ans2.pb({za2.b,za2.b});
				ans.pb({le.a,le.a});
				ans2.pb({le.b,le.b});
				
			//		ans.pb({za.a,za.a});
			//	ans2.pb({za2.a,za2.a});
			}
			else{
				assert(le.b>za2.a);

				ans.pb({za.a,za.a});
				ans2.pb({za2.a,za2.a});
				ans.pb({le.a,le.a});
				ans2.pb({le.b,le.b});	
				
			//	ans.pb({za.b,za.b});
			//	ans2.pb({za2.b,za2.b});
			}
			//assert(n<=20);
		/*	cout<<11<<endl;
			for(int i=0;i<5;i++){
			    if(ans.size()>=i+1){
			        cout<<ans2[ans2.size()-i-1].a<<"::"<<ans2[ans2.size()-i-1].b<<endl;
			        
			    }
			}*/
			for(llo jj=l+1;jj<=ans2.back().a;jj++){
				xx[ss[jj].b].erase({ss[jj].a.b,jj});	
			}
			l=ans2.back().a;
			int zaa=cur.b;
			cur={ans[ans.size()-2],1-zaa};
			cur2={ans.back(),zaa};
			continue;
		}
		else{
			int za=0;
			for(llo jj=l+1;jj<=max(ans2.back().b,ans2.back().a);jj++){
				xx[ss[jj].b].erase({ss[jj].a.b,jj});	
				za=1;
			}
			l=max(ans2.back().b,ans2.back().a);
			if(za==1){
				continue;
			}
		}
		assert(le.b>l or le.b==-1);
		assert(re.b>l or re.b==-1);

		

		if(le.a==-1){
			ans.pb({re.a,re.a});
			pair<pair<llo,llo>,llo> cur3={{re.a,re.a},cur.b};
			ans2.pb({re.b,re.b});
			cur=cur2;
			for(llo jj=l+1;jj<=re.b;jj++){
				xx[ss[jj].b].erase({ss[jj].a.b,jj});
			}
			l=re.b;
			cur2=cur3;
		//	cout<<11<<endl;
			continue;;
		}
		if(re.a==-1){
			ans.pb({le.a,le.a});
			ans2.pb({le.b,le.b});
			pair<pair<llo,llo>,llo> cur3={{le.a,le.a},cur.b};
			for(llo jj=l+1;jj<=le.b;jj++){
				xx[ss[jj].b].erase({ss[jj].a.b,jj});
			}
			l=le.b;

			cur=cur2;
			cur2=cur3;

			continue;
		}
		if(le.b>re.b){
			swap(le,re);
		}
		for(llo jj=l+1;jj<=le.b;jj++){
			xx[ss[jj].b].erase({ss[jj].a.b,jj});
		}
		l=le.b;
		pair<llo,llo> cc={-1,-1};
		pair<llo,llo> dd={-1,-1};
		auto pp=xx[cur2.b].lower_bound({max(cur2.a.b,cur2.a.a)+1,-1});
		if(pp!=xx[cur2.b].end()){
			cc=*pp;
		}
		pp=xx[cur2.b].lower_bound({min(cur2.a.a,cur2.a.b),-1});
		if(pp!=xx[cur2.b].begin()){
			pp--;
			dd=(*pp);
		} 
		if((cc.b>le.b and cc.b<re.b) or (dd.b>le.b and dd.b<re.b)){
			
			vector<pair<llo,llo>> tt;
			if(cc.b>le.b and cc.b<re.b){
				tt.pb({cc.a,cc.b});
			}
			if(dd.b>le.b and dd.b<re.b){
				tt.pb({dd.a,dd.b});
			}
			if(tt.size()==1){
				ans.pb({le.a,le.a});
				ans2.pb({le.b,le.b});
				pair<pair<llo,llo>,llo> cur3={{le.a,le.a},cur.b};
				cur=cur2;
				cur2=cur3;
				continue;
			}
			ans.pb({le.a,le.a});
			ans2.pb({le.b,le.b});
			sort(tt.begin(),tt.end());
			ans.pb({tt[0].a,tt.back().a});
			ans2.pb({tt[0].b,tt.back().b});
			//pair<pair<llo,llo>,llo> cur3={ans.back(),cur.b};
			cur={{le.a,le.a},cur.b};
			cur2={ans.back(),cur2.b};

			for(llo j=l+1;j<=min(tt[0].b,tt.back().b);j++){
				xx[ss[j].b].erase({ss[j].a.b,j});
			}
			l=min(tt[0].b,tt.back().b);
		}
		else{
			ans.pb({min(le.a,re.a),max(le.a,re.a)});
			if(le.a<re.a){
				ans2.pb({le.b,re.b});
			}
			else{
				ans2.pb({re.b,le.b});
			}
			pair<pair<llo,llo>,llo> cur3={{min(le.a,re.a),max(le.a,re.a)},cur.b};
			cur=cur2;
			cur2=cur3;
			/*for(llo jj=le.b+1;jj<=max(re.b,le.b);jj++){
				xx[ss[jj].b].erase({ss[jj].a.b,jj});
			}
			l=max(re.b,le.b);*/
			continue;
		}
	}
	dp[0][0]=0;
	dp[0][1]=0;
	dp[1][0]=0;
	dp[1][1]=0;
	llo zz=ok;
	zz=zz^(((llo)ans.size()-2)%2);
	if(zz==0){
		ans.pb({0,n-1});
	}
	else{
		ans.pb({0,m-1});
	}
	
	for(llo i=2;i<ans.size();i++){
		dp[i][0]=max(dp[i-2][0]+abs(ans[i-2].a-ans[i].a),dp[i-2][1]+abs(ans[i-2].b-ans[i].a));
		dp[i][1]=max(dp[i-2][0]+abs(ans[i-2].a-ans[i].b),dp[i-2][1]+abs(ans[i-2].b-ans[i].b));
	}
/*	for(int i=0;i+1<ans2.size();i++){
	    assert(max(ans2[i].a,ans2[i].b)<min(ans2[i+1].a,ans2[i+1].b));
	}*/
//	cout<<ans.size()<<endl;
	llo su=max(dp[ans.size()-1][0],dp[ans.size()-1][1]);
	su+=max(dp[ans.size()-2][0],dp[ans.size()-2][1]);
/*	if(ka==1){
	    for(int j=0;j<ans2.size();j++){
	        cout<<ans2[j].a<<":"<<ans2[j].b<<"::"<<ans[j].a<<":"<<ans[j].b<<endl;
	    }*/
/*	    for(auto j:ans2){
	        cout<<j.a<<":"<<j.b<<endl;
	    }*/
/*	    cout<<su<<endl;
	    cout<<endl;
	    
	}*/
	/*for(auto j:ans){
		cout<<j.a<<":"<<j.b<<endl;
	}*/
	return su;
}
int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	//setIO("05-04");

	cin>>n>>m>>q;

	for(llo i=0;i<n;i++){
		cin>>aa[i];
		ss.pb({{aa[i],i},0});
	}

	for(llo i=0;i<m;i++){
		cin>>bb[i];
		ss.pb({{bb[i],i},1});
	}
	sort(ss.begin(),ss.end());

	while(q--){
		llo l,r;
		cin>>l>>r;
		l--;
		r--;
		llo ans=0;
		for(llo x=l-1;x>=0;x--){
			if(aa[x]>bb[r]){
				ans=max(ans,solve(x,r)+(l-x));
				break;
			}
			ans=max(ans,abs(x-l));
		}
		for(llo x=l+1;x<n;x++){
			if(aa[x]>bb[r]){
				ans=max(ans,solve(x,r)+abs(l-x));
				break;
			}
			ans=max(ans,abs(x-l));

		}
		for(llo x=r-1;x>=0;x--){
			if(bb[x]>aa[l]){
				ans=max(ans,solve(l,x)+abs(x-r));
				break;
			}
			ans=max(ans,abs(x-r));
		}
		for(llo x=r+1;x<m;x++){
			if(bb[x]>aa[l]){
				ans=max(ans,solve(l,x)+abs(x-r));
				break;
			}
			ans=max(ans,abs(x-r));
		}
		/*if(ans==3306){
			cout<<2423<<endl;
			continue;
		}*/
		cout<<ans<<endl;

	}
//	cout<<ss[3881].a.b<<"?"<<ss[3881].b<<endl;
  //  cout<<ss[3966].a.b<<"?"<<ss[3966].b<<endl;
  ////  cout<<ss[3999].a.b<<"?"<<ss[3999].b<<endl;

//	cout<<solve(1,2)<<endl;





 
 
 
	return 0;
}

Compilation message

abduction2.cpp: In function 'llo solve(llo, llo)':
abduction2.cpp:23:17: warning: comparison of integer expressions of different signedness: 'llo' {aka 'long long int'} and 'std::vector<std::pair<std::pair<long long int, long long int>, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |  for(llo ii=0;ii<ss.size();ii++){
      |               ~~^~~~~~~~~~
abduction2.cpp:36:31: warning: comparison of integer expressions of different signedness: 'llo' {aka 'long long int'} and 'std::vector<std::pair<std::pair<long long int, long long int>, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   36 |  for(llo jj=max(ind,ind2)+1;jj<ss.size();jj++){
      |                             ~~^~~~~~~~~~
abduction2.cpp:268:15: warning: comparison of integer expressions of different signedness: 'llo' {aka 'long long int'} and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  268 |  for(llo i=2;i<ans.size();i++){
      |              ~^~~~~~~~~~~
abduction2.cpp: In function 'void setIO(std::string)':
abduction2.cpp:10:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 |  freopen((name+".txt").c_str(),"r",stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 2 ms 596 KB Output is correct
13 Correct 2 ms 468 KB Output is correct
14 Correct 2 ms 596 KB Output is correct
15 Correct 3 ms 596 KB Output is correct
16 Correct 1 ms 468 KB Output is correct
17 Correct 1 ms 468 KB Output is correct
18 Correct 1 ms 468 KB Output is correct
19 Correct 2 ms 596 KB Output is correct
20 Correct 3 ms 596 KB Output is correct
21 Correct 2 ms 596 KB Output is correct
22 Correct 4 ms 820 KB Output is correct

Subtask #3
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 2 ms 596 KB Output is correct
13 Correct 2 ms 468 KB Output is correct
14 Correct 2 ms 596 KB Output is correct
15 Correct 3 ms 596 KB Output is correct
16 Correct 1 ms 468 KB Output is correct
17 Correct 1 ms 468 KB Output is correct
18 Correct 1 ms 468 KB Output is correct
19 Correct 2 ms 596 KB Output is correct
20 Correct 3 ms 596 KB Output is correct
21 Correct 2 ms 596 KB Output is correct
22 Correct 4 ms 820 KB Output is correct
23 Correct 68 ms 7472 KB Output is correct
24 Correct 26 ms 4540 KB Output is correct
25 Correct 34 ms 5948 KB Output is correct
26 Correct 32 ms 4616 KB Output is correct
27 Correct 94 ms 8928 KB Output is correct
28 Correct 53 ms 8272 KB Output is correct
29 Correct 24 ms 4372 KB Output is correct
30 Correct 58 ms 7272 KB Output is correct
31 Correct 69 ms 8252 KB Output is correct
32 Correct 17 ms 4168 KB Output is correct
33 Correct 29 ms 5200 KB Output is correct

Subtask #4
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 85 ms 680 KB Output is correct
2 Correct 96 ms 704 KB Output is correct
3 Correct 74 ms 704 KB Output is correct
4 Correct 89 ms 700 KB Output is correct
5 Correct 77 ms 688 KB Output is correct
6 Correct 63 ms 724 KB Output is correct
7 Correct 60 ms 736 KB Output is correct
8 Correct 96 ms 852 KB Output is correct
9 Correct 98 ms 668 KB Output is correct
10 Correct 112 ms 716 KB Output is correct
11 Correct 136 ms 916 KB Output is correct

Subtask #5
0 / 56.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 2 ms 596 KB Output is correct
13 Correct 2 ms 468 KB Output is correct
14 Correct 2 ms 596 KB Output is correct
15 Correct 3 ms 596 KB Output is correct
16 Correct 1 ms 468 KB Output is correct
17 Correct 1 ms 468 KB Output is correct
18 Correct 1 ms 468 KB Output is correct
19 Correct 2 ms 596 KB Output is correct
20 Correct 3 ms 596 KB Output is correct
21 Correct 2 ms 596 KB Output is correct
22 Correct 4 ms 820 KB Output is correct
23 Correct 68 ms 7472 KB Output is correct
24 Correct 26 ms 4540 KB Output is correct
25 Correct 34 ms 5948 KB Output is correct
26 Correct 32 ms 4616 KB Output is correct
27 Correct 94 ms 8928 KB Output is correct
28 Correct 53 ms 8272 KB Output is correct
29 Correct 24 ms 4372 KB Output is correct
30 Correct 58 ms 7272 KB Output is correct
31 Correct 69 ms 8252 KB Output is correct
32 Correct 17 ms 4168 KB Output is correct
33 Correct 29 ms 5200 KB Output is correct
34 Correct 85 ms 680 KB Output is correct
35 Correct 96 ms 704 KB Output is correct
36 Correct 74 ms 704 KB Output is correct
37 Correct 89 ms 700 KB Output is correct
38 Correct 77 ms 688 KB Output is correct
39 Correct 63 ms 724 KB Output is correct
40 Correct 60 ms 736 KB Output is correct
41 Correct 96 ms 852 KB Output is correct
42 Correct 98 ms 668 KB Output is correct
43 Correct 112 ms 716 KB Output is correct
44 Correct 136 ms 916 KB Output is correct
45 Correct 3604 ms 9500 KB Output is correct
46 Correct 3071 ms 9544 KB Output is correct
47 Correct 3564 ms 9840 KB Output is correct
48 Incorrect 3280 ms 9536 KB Output isn't correct
49 Halted 0 ms 0 KB -