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답안 #786221

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
786221 2023-07-18T05:29:58 Z kshitij_sodani 유괴 2 (JOI17_abduction2) C++14
44 / 100
 5000 ms 9488 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()-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],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));
		}

		cout<<ans<<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

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

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 1 ms 340 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 592 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 552 KB Output is correct
21 Correct 3 ms 468 KB Output is correct
22 Correct 3 ms 596 KB Output is correct

Subtask #3
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 1 ms 340 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 592 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 552 KB Output is correct
21 Correct 3 ms 468 KB Output is correct
22 Correct 3 ms 596 KB Output is correct
23 Correct 66 ms 4696 KB Output is correct
24 Correct 26 ms 2504 KB Output is correct
25 Correct 32 ms 3540 KB Output is correct
26 Correct 30 ms 2632 KB Output is correct
27 Correct 90 ms 5868 KB Output is correct
28 Correct 53 ms 5516 KB Output is correct
29 Correct 25 ms 2376 KB Output is correct
30 Correct 55 ms 4636 KB Output is correct
31 Correct 69 ms 5492 KB Output is correct
32 Correct 15 ms 2252 KB Output is correct
33 Correct 24 ms 2760 KB Output is correct

Subtask #4
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 83 ms 576 KB Output is correct
2 Correct 93 ms 468 KB Output is correct
3 Correct 74 ms 576 KB Output is correct
4 Correct 90 ms 560 KB Output is correct
5 Correct 78 ms 560 KB Output is correct
6 Correct 71 ms 596 KB Output is correct
7 Correct 58 ms 584 KB Output is correct
8 Correct 83 ms 612 KB Output is correct
9 Correct 91 ms 584 KB Output is correct
10 Correct 105 ms 596 KB Output is correct
11 Correct 111 ms 704 KB Output is correct

Subtask #5
0 / 56.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 1 ms 340 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 592 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 552 KB Output is correct
21 Correct 3 ms 468 KB Output is correct
22 Correct 3 ms 596 KB Output is correct
23 Correct 66 ms 4696 KB Output is correct
24 Correct 26 ms 2504 KB Output is correct
25 Correct 32 ms 3540 KB Output is correct
26 Correct 30 ms 2632 KB Output is correct
27 Correct 90 ms 5868 KB Output is correct
28 Correct 53 ms 5516 KB Output is correct
29 Correct 25 ms 2376 KB Output is correct
30 Correct 55 ms 4636 KB Output is correct
31 Correct 69 ms 5492 KB Output is correct
32 Correct 15 ms 2252 KB Output is correct
33 Correct 24 ms 2760 KB Output is correct
34 Correct 83 ms 576 KB Output is correct
35 Correct 93 ms 468 KB Output is correct
36 Correct 74 ms 576 KB Output is correct
37 Correct 90 ms 560 KB Output is correct
38 Correct 78 ms 560 KB Output is correct
39 Correct 71 ms 596 KB Output is correct
40 Correct 58 ms 584 KB Output is correct
41 Correct 83 ms 612 KB Output is correct
42 Correct 91 ms 584 KB Output is correct
43 Correct 105 ms 596 KB Output is correct
44 Correct 111 ms 704 KB Output is correct
45 Correct 3620 ms 6212 KB Output is correct
46 Correct 2913 ms 6332 KB Output is correct
47 Correct 3542 ms 6312 KB Output is correct
48 Correct 3239 ms 6220 KB Output is correct
49 Correct 3552 ms 6368 KB Output is correct
50 Correct 1851 ms 6764 KB Output is correct
51 Correct 1539 ms 7108 KB Output is correct
52 Correct 2578 ms 7240 KB Output is correct
53 Correct 2625 ms 7068 KB Output is correct
54 Correct 2357 ms 6668 KB Output is correct
55 Correct 2973 ms 9488 KB Output is correct
56 Execution timed out 5054 ms 6716 KB Time limit exceeded
57 Halted 0 ms 0 KB -