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답안 #786325

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
786325 2023-07-18T06:28:33 Z kshitij_sodani 유괴 2 (JOI17_abduction2) C++14
100 / 100
 545 ms 7464 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'

int aa[50001];
int bb[50001];
int n,m,q;
vector<pair<pair<int,int>,int>> ss;
llo dp[100001][2];
int ind5[50001][2];
vector<pair<int,int>> yy[2];
vector<pair<int,int>> zz[2];

int coo=0;

llo solve(int i,int j){
	int ind=ind5[i][0];
	int ind2=ind5[j][1];
	pair<pair<int,int>,int> cur={{i,i},0};
	pair<pair<int,int>,int> cur2={{j,j},1};
	yy[0].clear();
	yy[1].clear();
	zz[0].clear();
	zz[1].clear();
	for(int x=0;x<i;x++){
		if(aa[x]>max(bb[j],aa[i])){
			yy[0].pb({x,ind5[x][0]});
		}
	}
	for(int x=n-1;x>i;x--){
		if(aa[x]>max(bb[j],aa[i])){
			zz[0].pb({x,ind5[x][0]});
		}
	}
	for(int x=0;x<j;x++){
		if(bb[x]>max(bb[j],aa[i])){
			yy[1].pb({x,ind5[x][1]});
		}
	}
	for(int x=m-1;x>j;x--){
		if(bb[x]>max(bb[j],aa[i])){
			zz[1].pb({x,ind5[x][1]});
		}
	}

	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});

	dp[0][0]=0;
	dp[0][1]=0;
	dp[1][0]=0;
	dp[1][1]=0;
	llo ma=0;

	while(true){
		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));
		}
		pair<int,int> le={-1,-1};//pos in original,pos in ss
		pair<int,int> re={-1,-1};
		while(yy[cur.b].size()){
			if(yy[cur.b].back().b<=l){
				yy[cur.b].pop_back();
			}
			else{
				le=yy[cur.b].back();
				break;
			}
		}
		while(zz[cur.b].size()){
			if(zz[cur.b].back().b<=l){
				zz[cur.b].pop_back();
			}
			else{
				re=zz[cur.b].back();
				break;
			}
		}
    	l=min(ans2.back().a,ans2.back().b);

		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));
			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(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();
			ans.pop_back();;
			ans2.pop_back();
			if(le.b<za2.a){
				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{
				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});
			}
			if(le.a<cur.a.a){
				yy[cur.b].pop_back();
			}
			else{
				zz[cur.b].pop_back();

			}
			l=ans2.back().a;
			int zaa=cur.b;
			cur={ans[ans.size()-2],zaa};
			cur2={ans.back(),1-zaa};
			continue;
		}
		else{
			l=max(ans2.back().a,ans2.back().b);
		}
		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{
				int pa=n-1;
				if(cur.b==1){
					pa=m-1;
				}
				cot+=max(dp[ans.size()-2][0]+abs(pa-cur.a.a),dp[ans.size()-2][1]+abs(pa-cur.a.b));
			}
			ma=max(ma,cot);
			ans.pb({le.a,le.a});
			ans2.pb({le.b,le.b});
			if(le.a<cur.a.a){
				yy[cur.b].pop_back();
			}
			else{
				zz[cur.b].pop_back();
				
			}
			pair<pair<int,int>,int> cur3={{le.a,le.a},cur.b};
			l=le.b;
			cur=cur2;
			cur2=cur3;

			continue;
		}
		l=le.b;
		pair<int,int> cc={-1,-1};
		pair<int,int> dd={-1,-1};

		while(yy[cur2.b].size()){
			if(yy[cur2.b].back().b<=l){
				yy[cur2.b].pop_back();
			}
			else{
				cc=yy[cur2.b].back();
				break;
			}
		}
		while(zz[cur2.b].size()){
			if(zz[cur2.b].back().b<=l){
				zz[cur2.b].pop_back();
			}
			else{
				dd=zz[cur2.b].back();
				break;
			}
		}
		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});
				if(le.a<cur.a.a){
					yy[cur.b].pop_back();
				}
				else{
					zz[cur.b].pop_back();
					
				}
				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});
			}
			yy[cur.b].pop_back();
			zz[cur.b].pop_back();
			l=re.b;
			pair<pair<int,int>,int> cur3={{min(le.a,re.a),max(le.a,re.a)},cur.b};
			cur=cur2;
			cur2=cur3;
			continue;
		}
	}

	return ma;
}
int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	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());
	for(int i=0;i<ss.size();i++){
		ind5[ss[i].a.b][ss[i].b]=i;
	}
	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:75:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   75 |   for(int i=xi;i<ans.size();i++){
      |                ~^~~~~~~~~~~
abduction2.cpp:50:6: warning: variable 'ok' set but not used [-Wunused-but-set-variable]
   50 |  int ok=0;
      |      ^~
abduction2.cpp: In function 'int main()':
abduction2.cpp:261:15: 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]
  261 |  for(int i=0;i<ss.size();i++){
      |              ~^~~~~~~~~~

Subtask #1
13.0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 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 1 ms 212 KB Output is correct
10 Correct 0 ms 212 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 0 ms 340 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 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 1 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 468 KB Output is correct
13 Correct 1 ms 468 KB Output is correct
14 Correct 1 ms 468 KB Output is correct
15 Correct 1 ms 468 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 1 ms 468 KB Output is correct
20 Correct 1 ms 468 KB Output is correct
21 Correct 2 ms 468 KB Output is correct
22 Correct 1 ms 596 KB Output is correct

Subtask #3
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 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 1 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 468 KB Output is correct
13 Correct 1 ms 468 KB Output is correct
14 Correct 1 ms 468 KB Output is correct
15 Correct 1 ms 468 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 1 ms 468 KB Output is correct
20 Correct 1 ms 468 KB Output is correct
21 Correct 2 ms 468 KB Output is correct
22 Correct 1 ms 596 KB Output is correct
23 Correct 18 ms 2940 KB Output is correct
24 Correct 17 ms 2424 KB Output is correct
25 Correct 23 ms 2668 KB Output is correct
26 Correct 19 ms 2424 KB Output is correct
27 Correct 25 ms 3448 KB Output is correct
28 Correct 27 ms 4232 KB Output is correct
29 Correct 21 ms 2612 KB Output is correct
30 Correct 29 ms 3956 KB Output is correct
31 Correct 23 ms 4288 KB Output is correct
32 Correct 13 ms 2400 KB Output is correct
33 Correct 18 ms 2936 KB Output is correct

Subtask #4
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 468 KB Output is correct
2 Correct 7 ms 512 KB Output is correct
3 Correct 6 ms 468 KB Output is correct
4 Correct 6 ms 468 KB Output is correct
5 Correct 6 ms 516 KB Output is correct
6 Correct 11 ms 468 KB Output is correct
7 Correct 11 ms 532 KB Output is correct
8 Correct 14 ms 540 KB Output is correct
9 Correct 15 ms 556 KB Output is correct
10 Correct 16 ms 540 KB Output is correct
11 Correct 31 ms 604 KB Output is correct

Subtask #5
56.0 / 56.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 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 1 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 468 KB Output is correct
13 Correct 1 ms 468 KB Output is correct
14 Correct 1 ms 468 KB Output is correct
15 Correct 1 ms 468 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 1 ms 468 KB Output is correct
20 Correct 1 ms 468 KB Output is correct
21 Correct 2 ms 468 KB Output is correct
22 Correct 1 ms 596 KB Output is correct
23 Correct 18 ms 2940 KB Output is correct
24 Correct 17 ms 2424 KB Output is correct
25 Correct 23 ms 2668 KB Output is correct
26 Correct 19 ms 2424 KB Output is correct
27 Correct 25 ms 3448 KB Output is correct
28 Correct 27 ms 4232 KB Output is correct
29 Correct 21 ms 2612 KB Output is correct
30 Correct 29 ms 3956 KB Output is correct
31 Correct 23 ms 4288 KB Output is correct
32 Correct 13 ms 2400 KB Output is correct
33 Correct 18 ms 2936 KB Output is correct
34 Correct 6 ms 468 KB Output is correct
35 Correct 7 ms 512 KB Output is correct
36 Correct 6 ms 468 KB Output is correct
37 Correct 6 ms 468 KB Output is correct
38 Correct 6 ms 516 KB Output is correct
39 Correct 11 ms 468 KB Output is correct
40 Correct 11 ms 532 KB Output is correct
41 Correct 14 ms 540 KB Output is correct
42 Correct 15 ms 556 KB Output is correct
43 Correct 16 ms 540 KB Output is correct
44 Correct 31 ms 604 KB Output is correct
45 Correct 140 ms 4524 KB Output is correct
46 Correct 132 ms 4688 KB Output is correct
47 Correct 146 ms 4396 KB Output is correct
48 Correct 136 ms 4184 KB Output is correct
49 Correct 145 ms 4436 KB Output is correct
50 Correct 290 ms 5184 KB Output is correct
51 Correct 268 ms 5284 KB Output is correct
52 Correct 420 ms 5764 KB Output is correct
53 Correct 399 ms 5648 KB Output is correct
54 Correct 365 ms 5552 KB Output is correct
55 Correct 545 ms 7464 KB Output is correct
56 Correct 435 ms 4672 KB Output is correct
57 Correct 179 ms 4372 KB Output is correct
58 Correct 165 ms 4356 KB Output is correct
59 Correct 174 ms 4936 KB Output is correct