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답안 #785888

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
785888 2023-07-17T17:54:06 Z kshitij_sodani 유괴 2 (JOI17_abduction2) C++14
44 / 100
 3853 ms 10408 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'
 
llo aa[50001];
llo bb[50001];
llo n,m,q;
vector<pair<pair<llo,llo>,llo>> ss;
set<pair<llo,llo>> xx[2];
llo dp[50001][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};
    
		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();;
			ka=1;
			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)){
			ans.pb({le.a,le.a});
			ans2.pb({le.b,le.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});
			}
			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);
	
	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:19:17: 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]
   19 |  for(llo ii=0;ii<ss.size();ii++){
      |               ~~^~~~~~~~~~
abduction2.cpp:32:31: 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]
   32 |  for(llo jj=max(ind,ind2)+1;jj<ss.size();jj++){
      |                             ~~^~~~~~~~~~
abduction2.cpp:251:15: 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]
  251 |  for(llo i=2;i<ans.size();i++){
      |              ~^~~~~~~~~~~
abduction2.cpp:56:6: warning: variable 'ka' set but not used [-Wunused-but-set-variable]
   56 |  llo ka=0;
      |      ^~

Subtask #1
13.0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 0 ms 336 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 0 ms 328 KB Output is correct
11 Correct 1 ms 212 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 0 ms 336 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 0 ms 328 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 2 ms 596 KB Output is correct
13 Correct 3 ms 596 KB Output is correct
14 Correct 3 ms 600 KB Output is correct
15 Correct 2 ms 596 KB Output is correct
16 Correct 1 ms 560 KB Output is correct
17 Correct 1 ms 596 KB Output is correct
18 Correct 2 ms 556 KB Output is correct
19 Correct 2 ms 596 KB Output is correct
20 Correct 3 ms 548 KB Output is correct
21 Correct 3 ms 556 KB Output is correct
22 Correct 3 ms 840 KB Output is correct

Subtask #3
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 0 ms 336 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 0 ms 328 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 2 ms 596 KB Output is correct
13 Correct 3 ms 596 KB Output is correct
14 Correct 3 ms 600 KB Output is correct
15 Correct 2 ms 596 KB Output is correct
16 Correct 1 ms 560 KB Output is correct
17 Correct 1 ms 596 KB Output is correct
18 Correct 2 ms 556 KB Output is correct
19 Correct 2 ms 596 KB Output is correct
20 Correct 3 ms 548 KB Output is correct
21 Correct 3 ms 556 KB Output is correct
22 Correct 3 ms 840 KB Output is correct
23 Correct 69 ms 8244 KB Output is correct
24 Correct 26 ms 5340 KB Output is correct
25 Correct 36 ms 6556 KB Output is correct
26 Correct 31 ms 5332 KB Output is correct
27 Correct 97 ms 9680 KB Output is correct
28 Correct 51 ms 8916 KB Output is correct
29 Correct 23 ms 5044 KB Output is correct
30 Correct 56 ms 7992 KB Output is correct
31 Correct 78 ms 8984 KB Output is correct
32 Correct 17 ms 4844 KB Output is correct
33 Correct 26 ms 5648 KB Output is correct

Subtask #4
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 88 ms 732 KB Output is correct
2 Correct 98 ms 732 KB Output is correct
3 Correct 73 ms 652 KB Output is correct
4 Correct 95 ms 688 KB Output is correct
5 Correct 77 ms 728 KB Output is correct
6 Correct 61 ms 736 KB Output is correct
7 Correct 57 ms 744 KB Output is correct
8 Correct 101 ms 720 KB Output is correct
9 Correct 91 ms 680 KB Output is correct
10 Correct 102 ms 752 KB Output is correct
11 Correct 102 ms 944 KB Output is correct

Subtask #5
0 / 56.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 0 ms 336 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 0 ms 328 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 2 ms 596 KB Output is correct
13 Correct 3 ms 596 KB Output is correct
14 Correct 3 ms 600 KB Output is correct
15 Correct 2 ms 596 KB Output is correct
16 Correct 1 ms 560 KB Output is correct
17 Correct 1 ms 596 KB Output is correct
18 Correct 2 ms 556 KB Output is correct
19 Correct 2 ms 596 KB Output is correct
20 Correct 3 ms 548 KB Output is correct
21 Correct 3 ms 556 KB Output is correct
22 Correct 3 ms 840 KB Output is correct
23 Correct 69 ms 8244 KB Output is correct
24 Correct 26 ms 5340 KB Output is correct
25 Correct 36 ms 6556 KB Output is correct
26 Correct 31 ms 5332 KB Output is correct
27 Correct 97 ms 9680 KB Output is correct
28 Correct 51 ms 8916 KB Output is correct
29 Correct 23 ms 5044 KB Output is correct
30 Correct 56 ms 7992 KB Output is correct
31 Correct 78 ms 8984 KB Output is correct
32 Correct 17 ms 4844 KB Output is correct
33 Correct 26 ms 5648 KB Output is correct
34 Correct 88 ms 732 KB Output is correct
35 Correct 98 ms 732 KB Output is correct
36 Correct 73 ms 652 KB Output is correct
37 Correct 95 ms 688 KB Output is correct
38 Correct 77 ms 728 KB Output is correct
39 Correct 61 ms 736 KB Output is correct
40 Correct 57 ms 744 KB Output is correct
41 Correct 101 ms 720 KB Output is correct
42 Correct 91 ms 680 KB Output is correct
43 Correct 102 ms 752 KB Output is correct
44 Correct 102 ms 944 KB Output is correct
45 Correct 3853 ms 10252 KB Output is correct
46 Correct 3104 ms 10240 KB Output is correct
47 Correct 3761 ms 10408 KB Output is correct
48 Incorrect 3458 ms 10156 KB Output isn't correct
49 Halted 0 ms 0 KB -