oj.uz

Submission #786225

# Submission time Handle Problem Language Result Execution time Memory
786225 2023-07-18T05:35:57 Z kshitij_sodani Abduction 2 (JOI17_abduction2) C++14
44 / 100
 5000 ms 9396 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);
}
int aa[50001];
int bb[50001];
int n,m,q;
vector<pair<pair<int,int>,int>> ss;
set<pair<int,int>> xx[2];
llo dp[100001][2];
llo solve(int i,int j){
	//cout<<i<<",,"<<j<<endl;
	int ind=-1;
	int ind2=-1;
	for(int 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<int,int>,int> cur={{i,i},0};

	pair<pair<int,int>,int> cur2={{j,j},1};
	for(int 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;
	
	int ok=0;
	if(ind>ind2){
		ok=1;
		swap(cur,cur2);
		swap(ind,ind2);
	}
	int l=ind2;
	vector<pair<int,int>> ans;
	vector<pair<int,int>> 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;
	/*int ka=0;
	if(i==1820 and j==1935){
	    ka=1;
	}*/
	dp[0][0]=0;
	dp[0][1]=0;
	dp[1][0]=0;
	dp[1][1]=0;
	llo ma=0;

	while(true){
	/*	for(auto j:ans){
			cout<<j.a<<","<<j.b<<endl;
		}
		cout<<endl;*/
		int xi=2;
		if(ans.size()>=7){
			xi=ans.size()-3;
		}
		for(int i=xi;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));
		}
	   // assert(cur.b-cur2.b==1);
	  //  cout<<cur.b<<",,"<<cur2.b<<","<<(ans.size()%2)<<endl;
		pair<int,int> le={-1,-1};//pos in original,pos in ss
		pair<int,int> 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);
		}
		if(j!=xx[cur.b].begin()){
			j--;
			le=(*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){
			llo cot=max(dp[ans.size()-1][0],dp[ans.size()-1][1]);
			int pa=n-1;
			if(cur.b==1){
				pa=m-1;
			}
			cot+=max(dp[ans.size()-2][0]+max(cur.a.a,pa-cur.a.a),dp[ans.size()-2][1]+max(cur.a.b,pa-cur.a.b));
		/*	if(le.a>max(cur.a.b,cur.a.a)){
				
			}
			else{
				
				cot+=max(dp[ans.size()-2][0]+abs(pa-cur.a.a),dp[ans.size()-2][1]+abs(pa-cur.a.b));
			}*/
			//cout<<cot<<":::"<<endl;
			ma=max(ma,cot);
			break;
		}
		if(le.a==-1){
			swap(le,re);
		}
		else if(re.a==-1){

		}
		else{
			if(le.b>re.b){
				swap(le,re);
			}
		}
		/*if(ans.size()==3){
			cout<<le.a<<":"<<le.b<<":"<<re.a<<":"<<re.b<<endl;
		}*/
		
		if(le.b>=0 and le.b<max(ans2.back().a,ans2.back().b)){
			pair<int,int> za=ans.back();
			pair<int,int> 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(int 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],zaa};
			cur2={ans.back(),1-zaa};
			continue;
		}
		else{
			for(int jj=l+1;jj<=max(ans2.back().b,ans2.back().a);jj++){
				xx[ss[jj].b].erase({ss[jj].a.b,jj});	
			}
			l=max(ans2.back().b,ans2.back().a);
		}

		if(re.a==-1){
			llo cot=max(dp[ans.size()-1][0],dp[ans.size()-1][1]);
			if(le.a>max(cur.a.b,cur.a.a)){
				cot+=max(dp[ans.size()-2][0]+cur.a.a,dp[ans.size()-2][1]+cur.a.b);
			}
			else{
				//cout<<33<<endl;
				int pa=n-1;
				if(cur.b==1){
					pa=m-1;
				}
				//cout<<pa<<",,,,"<<endl;
				cot+=max(dp[ans.size()-2][0]+abs(pa-cur.a.a),dp[ans.size()-2][1]+abs(pa-cur.a.b));
			}
			//cout<<cot<<":::"<<endl;
			ma=max(ma,cot);
			ans.pb({le.a,le.a});
			ans2.pb({le.b,le.b});

			pair<pair<int,int>,int> cur3={{le.a,le.a},cur.b};
			for(int 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(int jj=l+1;jj<=le.b;jj++){
			xx[ss[jj].b].erase({ss[jj].a.b,jj});
		}
		l=le.b;
		pair<int,int> cc={-1,-1};
		pair<int,int> 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;
		}
		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)){
			ans.pb({le.a,le.a});
				ans2.pb({le.b,le.b});
				pair<pair<int,int>,int> cur3={{le.a,le.a},cur.b};
				cur=cur2;
				cur2=cur3;
				continue;

		}
		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<int,int>,int> cur3={{min(le.a,re.a),max(le.a,re.a)},cur.b};
			cur=cur2;
			cur2=cur3;
			continue;
		}
	}
	
/*	int zz=ok;
	zz=zz^(((int)ans.size()-2)%2);
	if(zz==0){
		ans.pb({0,n-1});
	}
	else{
		ans.pb({0,m-1});
	}
	dp[0][0]=0;
	dp[0][1]=0;
	dp[1][0]=0;
	dp[1][1]=0;
	for(int 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]);
	ma=max(ma,su);*/
/*	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 ma;
}
int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	//setIO("05-04");

	cin>>n>>m>>q;

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

	for(int 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(int 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(int 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(int 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(int 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));
		}

		cout<<ans<<endl;

	}



 
 	//int x=2e9;
 	////x+=5e8;
 	//cout<<x<<endl;

 
	return 0;
}

Compilation message

abduction2.cpp: In function 'llo solve(int, int)':
abduction2.cpp:23:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<std::pair<int, int>, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |  for(int ii=0;ii<ss.size();ii++){
      |               ~~^~~~~~~~~~
abduction2.cpp:36:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<std::pair<int, int>, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   36 |  for(int jj=max(ind,ind2)+1;jj<ss.size();jj++){
      |                             ~~^~~~~~~~~~
abduction2.cpp:79:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   79 |   for(int i=xi;i<ans.size();i++){
      |                ~^~~~~~~~~~~
abduction2.cpp:46:6: warning: variable 'ok' set but not used [-Wunused-but-set-variable]
   46 |  int ok=0;
      |      ^~
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 1 ms 340 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 356 KB Output is correct
11 Correct 1 ms 340 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 356 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 2 ms 468 KB Output is correct
13 Correct 2 ms 468 KB Output is correct
14 Correct 2 ms 468 KB Output is correct
15 Correct 2 ms 468 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 448 KB Output is correct
19 Correct 2 ms 468 KB Output is correct
20 Correct 3 ms 468 KB Output is correct
21 Correct 3 ms 468 KB Output is correct
22 Correct 4 ms 624 KB Output is correct

Subtask #3
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 356 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 2 ms 468 KB Output is correct
13 Correct 2 ms 468 KB Output is correct
14 Correct 2 ms 468 KB Output is correct
15 Correct 2 ms 468 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 448 KB Output is correct
19 Correct 2 ms 468 KB Output is correct
20 Correct 3 ms 468 KB Output is correct
21 Correct 3 ms 468 KB Output is correct
22 Correct 4 ms 624 KB Output is correct
23 Correct 69 ms 4764 KB Output is correct
24 Correct 30 ms 2500 KB Output is correct
25 Correct 32 ms 3564 KB Output is correct
26 Correct 30 ms 2552 KB Output is correct
27 Correct 90 ms 5740 KB Output is correct
28 Correct 54 ms 5396 KB Output is correct
29 Correct 23 ms 2312 KB Output is correct
30 Correct 64 ms 4612 KB Output is correct
31 Correct 72 ms 5456 KB Output is correct
32 Correct 19 ms 2316 KB Output is correct
33 Correct 25 ms 2800 KB Output is correct

Subtask #4
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 84 ms 548 KB Output is correct
2 Correct 95 ms 572 KB Output is correct
3 Correct 74 ms 568 KB Output is correct
4 Correct 92 ms 572 KB Output is correct
5 Correct 81 ms 684 KB Output is correct
6 Correct 63 ms 596 KB Output is correct
7 Correct 59 ms 580 KB Output is correct
8 Correct 83 ms 540 KB Output is correct
9 Correct 91 ms 600 KB Output is correct
10 Correct 106 ms 592 KB Output is correct
11 Correct 130 ms 684 KB Output is correct

Subtask #5
0 / 56.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 356 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 2 ms 468 KB Output is correct
13 Correct 2 ms 468 KB Output is correct
14 Correct 2 ms 468 KB Output is correct
15 Correct 2 ms 468 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 448 KB Output is correct
19 Correct 2 ms 468 KB Output is correct
20 Correct 3 ms 468 KB Output is correct
21 Correct 3 ms 468 KB Output is correct
22 Correct 4 ms 624 KB Output is correct
23 Correct 69 ms 4764 KB Output is correct
24 Correct 30 ms 2500 KB Output is correct
25 Correct 32 ms 3564 KB Output is correct
26 Correct 30 ms 2552 KB Output is correct
27 Correct 90 ms 5740 KB Output is correct
28 Correct 54 ms 5396 KB Output is correct
29 Correct 23 ms 2312 KB Output is correct
30 Correct 64 ms 4612 KB Output is correct
31 Correct 72 ms 5456 KB Output is correct
32 Correct 19 ms 2316 KB Output is correct
33 Correct 25 ms 2800 KB Output is correct
34 Correct 84 ms 548 KB Output is correct
35 Correct 95 ms 572 KB Output is correct
36 Correct 74 ms 568 KB Output is correct
37 Correct 92 ms 572 KB Output is correct
38 Correct 81 ms 684 KB Output is correct
39 Correct 63 ms 596 KB Output is correct
40 Correct 59 ms 580 KB Output is correct
41 Correct 83 ms 540 KB Output is correct
42 Correct 91 ms 600 KB Output is correct
43 Correct 106 ms 592 KB Output is correct
44 Correct 130 ms 684 KB Output is correct
45 Correct 3602 ms 6224 KB Output is correct
46 Correct 2991 ms 6316 KB Output is correct
47 Correct 3535 ms 6368 KB Output is correct
48 Correct 3372 ms 6192 KB Output is correct
49 Correct 3518 ms 6336 KB Output is correct
50 Correct 1733 ms 6740 KB Output is correct
51 Correct 1548 ms 7032 KB Output is correct
52 Correct 2641 ms 7252 KB Output is correct
53 Correct 2598 ms 7048 KB Output is correct
54 Correct 2431 ms 6676 KB Output is correct
55 Correct 2890 ms 9396 KB Output is correct
56 Execution timed out 5080 ms 6684 KB Time limit exceeded
57 Halted 0 ms 0 KB -