oj.uz

Submission #786214

# Submission time Handle Problem Language Result Execution time Memory
786214 2023-07-18T05:22:10 Z kshitij_sodani Abduction 2 (JOI17_abduction2) C++14
44 / 100
 5000 ms 9420 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[500001];
int bb[500001];
int n,m,q;
vector<pair<pair<int,int>,int>> ss;
set<pair<int,int>> xx[2];
llo dp[500001][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()-4;
		}
		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);
		}
		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(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],1-zaa};
			cur2={ans.back(),zaa};
			continue;
		}
		else{
			int za=0;
			for(int 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){
			assert(0==1);
			continue;;
		}
		if(re.a==-1){
			llo cot=max(dp[ans.size()-1][0],dp[ans.size()-1][1]);
		/*	cout<<11<<endl;
			for(auto j:ans){
				cout<<j.a<<",,"<<j.b<<endl;
			}*/
			//cout<<22<<endl;
			//cout<<cot<<"::"<<endl;
			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()){
			//if(pp!=xx[cur2.b].begin()){
				pp--;
				dd=(*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)){
			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;
			vector<pair<int,int>> 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){
				;
				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<int,int>,int> cur3={ans.back(),cur.b};
			cur={{le.a,le.a},cur.b};
			cur2={ans.back(),cur2.b};

			for(int 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<int,int>,int> cur3={{min(le.a,re.a),max(le.a,re.a)},cur.b};
			cur=cur2;
			cur2=cur3;
			/*for(int 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;
		}
	}
	
	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));
		}
		/*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(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:170:8: warning: variable 'za' set but not used [-Wunused-but-set-variable]
  170 |    int za=0;
      |        ^~
abduction2.cpp:312:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  312 |  for(int 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 1 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 212 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 1 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 212 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 1 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 1 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 212 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 544 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 340 KB Output is correct
19 Correct 2 ms 468 KB Output is correct
20 Correct 3 ms 468 KB Output is correct
21 Correct 4 ms 468 KB Output is correct
22 Correct 3 ms 612 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 1 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 1 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 212 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 544 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 340 KB Output is correct
19 Correct 2 ms 468 KB Output is correct
20 Correct 3 ms 468 KB Output is correct
21 Correct 4 ms 468 KB Output is correct
22 Correct 3 ms 612 KB Output is correct
23 Correct 64 ms 4736 KB Output is correct
24 Correct 26 ms 2632 KB Output is correct
25 Correct 32 ms 3592 KB Output is correct
26 Correct 30 ms 2620 KB Output is correct
27 Correct 90 ms 5852 KB Output is correct
28 Correct 63 ms 5368 KB Output is correct
29 Correct 23 ms 2384 KB Output is correct
30 Correct 57 ms 4628 KB Output is correct
31 Correct 68 ms 5432 KB Output is correct
32 Correct 16 ms 2252 KB Output is correct
33 Correct 25 ms 2816 KB Output is correct

Subtask #4
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 84 ms 572 KB Output is correct
2 Correct 94 ms 568 KB Output is correct
3 Correct 75 ms 544 KB Output is correct
4 Correct 92 ms 544 KB Output is correct
5 Correct 79 ms 572 KB Output is correct
6 Correct 69 ms 596 KB Output is correct
7 Correct 63 ms 604 KB Output is correct
8 Correct 89 ms 568 KB Output is correct
9 Correct 117 ms 596 KB Output is correct
10 Correct 110 ms 564 KB Output is correct
11 Correct 132 ms 860 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 1 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 1 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 212 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 544 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 340 KB Output is correct
19 Correct 2 ms 468 KB Output is correct
20 Correct 3 ms 468 KB Output is correct
21 Correct 4 ms 468 KB Output is correct
22 Correct 3 ms 612 KB Output is correct
23 Correct 64 ms 4736 KB Output is correct
24 Correct 26 ms 2632 KB Output is correct
25 Correct 32 ms 3592 KB Output is correct
26 Correct 30 ms 2620 KB Output is correct
27 Correct 90 ms 5852 KB Output is correct
28 Correct 63 ms 5368 KB Output is correct
29 Correct 23 ms 2384 KB Output is correct
30 Correct 57 ms 4628 KB Output is correct
31 Correct 68 ms 5432 KB Output is correct
32 Correct 16 ms 2252 KB Output is correct
33 Correct 25 ms 2816 KB Output is correct
34 Correct 84 ms 572 KB Output is correct
35 Correct 94 ms 568 KB Output is correct
36 Correct 75 ms 544 KB Output is correct
37 Correct 92 ms 544 KB Output is correct
38 Correct 79 ms 572 KB Output is correct
39 Correct 69 ms 596 KB Output is correct
40 Correct 63 ms 604 KB Output is correct
41 Correct 89 ms 568 KB Output is correct
42 Correct 117 ms 596 KB Output is correct
43 Correct 110 ms 564 KB Output is correct
44 Correct 132 ms 860 KB Output is correct
45 Correct 3815 ms 6188 KB Output is correct
46 Correct 3078 ms 6244 KB Output is correct
47 Correct 3738 ms 6296 KB Output is correct
48 Correct 3504 ms 6196 KB Output is correct
49 Correct 3597 ms 6376 KB Output is correct
50 Correct 1879 ms 6748 KB Output is correct
51 Correct 1672 ms 7036 KB Output is correct
52 Correct 2714 ms 7348 KB Output is correct
53 Correct 2749 ms 7088 KB Output is correct
54 Correct 2484 ms 6684 KB Output is correct
55 Correct 3030 ms 9420 KB Output is correct
56 Execution timed out 5082 ms 6688 KB Time limit exceeded
57 Halted 0 ms 0 KB -