oj.uz

Submission #384976

# Submission time Handle Problem Language Result Execution time Memory
384976 2021-04-02T19:02:46 Z kshitij_sodani Ancient Books (IOI17_books) C++14
100 / 100
 1657 ms 290552 KB 
//#pragma GCC optimize("Ofast,unroll-loops")
#include <bits/stdc++.h>
using namespace std;
typedef long long llo;
#define mp make_pair
#define pb push_back
#define a first 
#define b second
#define endl '\n'


#include "books.h"
int ans=0;
int n;
vector<int> adj[1000001];
int vis[1000001];
//pair<int,int> cot[1000001];
int par[1000001];
/*int find(int no){
	if(par[no]==no){
		return no;
	}
	par[no]=find(par[no]);
	return par[no];
}*/
vector<int> ss;
void dfs(int no){
	vis[no]=1;
	ss.pb(no);
	for(auto j:adj[no]){
		if(vis[j]==0){
			dfs(j);
		}
	}
}


//vector<int> adj2[1000001];
int ind[1000001];
pair<int,int> pp;
vector<pair<int,int>> tt;
vector<pair<int,int>> pre2[1000001];

vector<pair<int,int>> pre3[1000001];

//int dp[1001][1001];
pair<int,int> rr2[1000001];

pair<int,int> rr[1000001];

/*void dfs2(int no,int par=-1){
	pp.a=min(pp.a,tt[no].a);
	pp.b=max(pp.b,tt[no].b);
	vis[no]=1;
	for(auto j:adj2[no]){
		if(vis[j]==0){
			dfs2(j);
		}
	}
}*/
vector<int> kk[1000001];
int tree[4*1000001];
void update(int no,int l,int r,int i,int j){
	if(l==r){
		tree[no]=min(tree[no],j);
	}
	else{
		int mid=(l+r)/2;
		if(i<=mid){
			update(no*2+1,l,mid,i,j);
		}
		else{
			update(no*2+2,mid+1,r,i,j);
		}
		tree[no]=min(tree[no*2+1],tree[no*2+2]);
	}
}
int query(int no,int l,int r,int aa,int bb){
	if(r<aa or l>bb){
		return n;
	}
	if(aa<=l and r<=bb){
		return tree[no];
	}
	else{
		int mid=(l+r)/2;
		return min(query(no*2+1,l,mid,aa,bb),query(no*2+2,mid+1,r,aa,bb));
	}
}

int tree2[4*1000001];
void update2(int no,int l,int r,int i,int j){
	if(l==r){
		tree2[no]=max(tree2[no],j);
	}
	else{
		int mid=(l+r)/2;
		if(i<=mid){
			update2(no*2+1,l,mid,i,j);
		}
		else{
			update2(no*2+2,mid+1,r,i,j);
		}
		tree2[no]=max(tree2[no*2+1],tree2[no*2+2]);
	}
}
int query2(int no,int l,int r,int aa,int bb){
	if(r<aa or l>bb){
		return 0;
	}
	if(aa<=l and r<=bb){
		return tree2[no];
	}
	else{
		int mid=(l+r)/2;
		return max(query2(no*2+1,l,mid,aa,bb),query2(no*2+2,mid+1,r,aa,bb));
	}
}

long long minimum_walk(std::vector<int> p, int s) {
	while(p.size()){
		if(p.back()+1==p.size()){
			p.pop_back();
		}
		else{
			break;
		}
	}
	if(p.size()==0){
		return 0;
	}
	llo ans=0;
	if(s>=p.size()){
		llo xy=p.size();

		ans+=2*(s-xy+1);
		s=xy-1;
	}
	llo stt=0;
	while(stt<p.size()){
		if(p[stt]==stt){
			stt++;
		}
		else{
			break;
		}
	}
	vector<int> it;
	for(int j=stt;j<p.size();j++){
		it.pb(p[j]-stt);
	}
	if(it.size()==0){
		return 0;
	}
	p=it;

	
	if(s<stt){
		ans+=2*(stt-s);
		s=0;
	}
	else{
		s-=stt;
	}

	n=p.size();
	/*for(auto j:p){
		cout<<j<<"::"<<endl;
	}*/

	if(n==0){
		return 0;
	}
	for(int i=0;i<n;i++){
		adj[i].pb(p[i]);
	}
	//int co=0;
	
	vector<vector<int>> zz5;
	for(int i=0;i<n;i++){
		if(vis[i]==0){
			ss.clear();
			dfs(i);

			int mi=ss[0];
			int ma=ss[0];
			for(auto j:ss){
				mi=min(mi,j);
				ma=max(ma,j);
			}
			/*for(auto j:ss){
				cot[j]={mi,ma};
			}*/
			int zz=tt.size();
			for(auto j:ss){
				ind[j]=tt.size();
			}
			rr2[tt.size()]={mi,ma};
			tt.pb({mi,ma});
			
			for(int j=0;j+1<ss.size();j++){
				ans+=(llo)abs(ss[j]-ss[j+1]);
			}
			zz5.pb(ss);

			ans+=(llo)(abs(ss[0]-ss.back()));
			sort(ss.begin(),ss.end());
			for(int j=0;j+1<ss.size();j++){
				pre2[ss[j+1]].pb({ss[j],zz});
			}
			for(int j=0;j+1<ss.size();j++){
				pre3[ss[j]].pb({ss[j+1],zz});
			}
		}
	}

	for(int i=0;i<4*n;i++){
		tree[i]=4*n;
	}
	for(int i=0;i<n;i++){
		for(auto j:pre2[i]){
			int x=query(0,0,n-1,j.a,i-1);
			rr2[j.b].a=min(rr2[j.b].a,x);
			update(0,0,n-1,i,rr2[j.b].a);

		}
	}
	for(int i=0;i<4*n;i++){
		tree2[i]=0;
	}
	for(int i=n-1;i>=0;i--){
		for(auto j:pre3[i]){
			int x=query2(0,0,n-1,i+1,j.a);
			rr2[j.b].b=max(rr2[j.b].b,x);
			update2(0,0,n-1,i,rr2[j.b].b);

		}
	}	
	for(int i=0;i<tt.size();i++){
		for(auto j:zz5[i]){
			rr[j]=rr2[i];
		}
	}
	/*cout<<ans<<":"<<endl;
	for(int i=0;i<n;i++){
		cout<<rr[i].a<<",,"<<rr[i].b<<endl;
	}*/
	pair<int,int> cur3={rr[s].a,rr[s].b};
	while(cur3.a>0 or cur3.b<n-1){
		if(cur3.b==n-1){
			ans+=2;
			cur3={rr[cur3.a-1].a,max(cur3.b,rr[cur3.a-1].b)};
			continue;
		}
		else if(cur3.a==0){
			ans+=2;
			cur3={min(rr[cur3.b+1].a,cur3.a),rr[cur3.b+1].b};
			continue;
		}
		else{
			if(rr[cur3.a-1].b>cur3.b){
				ans+=2;

				cur3={rr[cur3.a-1].a,max(cur3.b,rr[cur3.a-1].b)};
				continue;
			}
			else if(rr[cur3.b+1].a<cur3.a){
				ans+=2;
				cur3={min(rr[cur3.b+1].a,cur3.a),rr[cur3.b+1].b};
				continue;
			}
			vector<pair<int,int>> aa;
			vector<pair<int,int>> bb;
			pair<int,int> cur4=cur3;
			pair<int,int> cur5=cur3;
			int st=-1;
			while(cur4.a>0 or cur5.b<n-1){
				if(cur4.a>0){
					if(rr[cur4.a-1].b>cur3.b){
						st=0;
						break;
					}
				}
				if(cur5.b<n-1){
					if(rr[cur5.b+1].a<cur3.a){
						st=1;
						break;
					}
				}
				if(cur4.a>0){
					cur4={rr[cur4.a-1].a,max(cur4.b,rr[cur4.a-1].b)};
					aa.pb(cur4);
				}
				if(cur5.b<n-1){
					cur5={min(rr[cur5.b+1].a,cur5.a),rr[cur5.b+1].b};
					bb.pb(cur5);
				}
			}
			llo xx2=aa.size();
			llo yy2=bb.size();
			if(st==-1){
				ans+=2*xx2+2*yy2;
				break;
			}
			if(st==0){
				cur3=aa.back();

				ans+=2*xx2;
			}
			else{
				cur3=bb.back();
				ans+=2*yy2;
			}
			
		}
	}


//	cout<<ans<<"..."<<endl;



	return ans;
}

Compilation message

books.cpp: In function 'long long int minimum_walk(std::vector<int>, int)':
books.cpp:122:16: warning: comparison of integer expressions of different signedness: '__gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type' {aka 'int'} and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  122 |   if(p.back()+1==p.size()){
      |      ~~~~~~~~~~^~~~~~~~~~
books.cpp:133:6: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  133 |  if(s>=p.size()){
      |     ~^~~~~~~~~~
books.cpp:140:11: warning: comparison of integer expressions of different signedness: 'llo' {aka 'long long int'} and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  140 |  while(stt<p.size()){
      |        ~~~^~~~~~~~~
books.cpp:149:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  149 |  for(int j=stt;j<p.size();j++){
      |                ~^~~~~~~~~
books.cpp:201:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  201 |    for(int j=0;j+1<ss.size();j++){
      |                ~~~^~~~~~~~~~
books.cpp:208:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  208 |    for(int j=0;j+1<ss.size();j++){
      |                ~~~^~~~~~~~~~
books.cpp:211:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  211 |    for(int j=0;j+1<ss.size();j++){
      |                ~~~^~~~~~~~~~
books.cpp:239:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  239 |  for(int i=0;i<tt.size();i++){
      |              ~^~~~~~~~~~

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 74 ms 94316 KB Output is correct
2 Correct 64 ms 94316 KB Output is correct
3 Correct 64 ms 94316 KB Output is correct
4 Correct 65 ms 94444 KB Output is correct
5 Correct 64 ms 94316 KB Output is correct
6 Correct 65 ms 94316 KB Output is correct
7 Correct 64 ms 94316 KB Output is correct
8 Correct 64 ms 94316 KB Output is correct
9 Correct 64 ms 94316 KB Output is correct
10 Correct 64 ms 94316 KB Output is correct
11 Correct 64 ms 94316 KB Output is correct
12 Correct 64 ms 94316 KB Output is correct
13 Correct 64 ms 94188 KB Output is correct
14 Correct 65 ms 94316 KB Output is correct
15 Correct 64 ms 94316 KB Output is correct
16 Correct 64 ms 94360 KB Output is correct
17 Correct 64 ms 94292 KB Output is correct
18 Correct 64 ms 94316 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 74 ms 94316 KB Output is correct
2 Correct 64 ms 94316 KB Output is correct
3 Correct 64 ms 94316 KB Output is correct
4 Correct 65 ms 94444 KB Output is correct
5 Correct 64 ms 94316 KB Output is correct
6 Correct 65 ms 94316 KB Output is correct
7 Correct 64 ms 94316 KB Output is correct
8 Correct 64 ms 94316 KB Output is correct
9 Correct 64 ms 94316 KB Output is correct
10 Correct 64 ms 94316 KB Output is correct
11 Correct 64 ms 94316 KB Output is correct
12 Correct 64 ms 94316 KB Output is correct
13 Correct 64 ms 94188 KB Output is correct
14 Correct 65 ms 94316 KB Output is correct
15 Correct 64 ms 94316 KB Output is correct
16 Correct 64 ms 94360 KB Output is correct
17 Correct 64 ms 94292 KB Output is correct
18 Correct 64 ms 94316 KB Output is correct
19 Correct 65 ms 94444 KB Output is correct
20 Correct 65 ms 94444 KB Output is correct
21 Correct 64 ms 94316 KB Output is correct
22 Correct 68 ms 94584 KB Output is correct
23 Correct 68 ms 94444 KB Output is correct
24 Correct 66 ms 94444 KB Output is correct
25 Correct 65 ms 94444 KB Output is correct
26 Correct 65 ms 94444 KB Output is correct
27 Correct 66 ms 94444 KB Output is correct
28 Correct 67 ms 94444 KB Output is correct
29 Correct 65 ms 94444 KB Output is correct

Subtask #3
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 74 ms 94316 KB Output is correct
2 Correct 64 ms 94316 KB Output is correct
3 Correct 64 ms 94316 KB Output is correct
4 Correct 65 ms 94444 KB Output is correct
5 Correct 64 ms 94316 KB Output is correct
6 Correct 65 ms 94316 KB Output is correct
7 Correct 64 ms 94316 KB Output is correct
8 Correct 64 ms 94316 KB Output is correct
9 Correct 64 ms 94316 KB Output is correct
10 Correct 64 ms 94316 KB Output is correct
11 Correct 64 ms 94316 KB Output is correct
12 Correct 64 ms 94316 KB Output is correct
13 Correct 64 ms 94188 KB Output is correct
14 Correct 65 ms 94316 KB Output is correct
15 Correct 64 ms 94316 KB Output is correct
16 Correct 64 ms 94360 KB Output is correct
17 Correct 64 ms 94292 KB Output is correct
18 Correct 64 ms 94316 KB Output is correct
19 Correct 65 ms 94444 KB Output is correct
20 Correct 65 ms 94444 KB Output is correct
21 Correct 64 ms 94316 KB Output is correct
22 Correct 68 ms 94584 KB Output is correct
23 Correct 68 ms 94444 KB Output is correct
24 Correct 66 ms 94444 KB Output is correct
25 Correct 65 ms 94444 KB Output is correct
26 Correct 65 ms 94444 KB Output is correct
27 Correct 66 ms 94444 KB Output is correct
28 Correct 67 ms 94444 KB Output is correct
29 Correct 65 ms 94444 KB Output is correct
30 Correct 1626 ms 290552 KB Output is correct
31 Correct 1657 ms 270548 KB Output is correct
32 Correct 189 ms 102124 KB Output is correct
33 Correct 730 ms 252568 KB Output is correct
34 Correct 743 ms 252440 KB Output is correct
35 Correct 858 ms 251672 KB Output is correct
36 Correct 1150 ms 250444 KB Output is correct
37 Correct 1351 ms 250836 KB Output is correct
38 Correct 1367 ms 251204 KB Output is correct
39 Correct 1376 ms 251092 KB Output is correct
40 Correct 1414 ms 252884 KB Output is correct
41 Correct 1583 ms 267956 KB Output is correct
42 Correct 1523 ms 258772 KB Output is correct
43 Correct 747 ms 252848 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 65 ms 94444 KB Output is correct
2 Correct 66 ms 94444 KB Output is correct
3 Correct 65 ms 94444 KB Output is correct
4 Correct 74 ms 94444 KB Output is correct
5 Correct 66 ms 94560 KB Output is correct
6 Correct 64 ms 94572 KB Output is correct
7 Correct 65 ms 94444 KB Output is correct
8 Correct 66 ms 94572 KB Output is correct
9 Correct 65 ms 94444 KB Output is correct
10 Correct 64 ms 94316 KB Output is correct
11 Correct 64 ms 94444 KB Output is correct
12 Correct 64 ms 94444 KB Output is correct
13 Correct 67 ms 94444 KB Output is correct
14 Correct 65 ms 94444 KB Output is correct
15 Correct 65 ms 94444 KB Output is correct
16 Correct 65 ms 94444 KB Output is correct
17 Correct 65 ms 94444 KB Output is correct
18 Correct 65 ms 94444 KB Output is correct
19 Correct 69 ms 94444 KB Output is correct
20 Correct 74 ms 94444 KB Output is correct

Subtask #5
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 74 ms 94316 KB Output is correct
2 Correct 64 ms 94316 KB Output is correct
3 Correct 64 ms 94316 KB Output is correct
4 Correct 65 ms 94444 KB Output is correct
5 Correct 64 ms 94316 KB Output is correct
6 Correct 65 ms 94316 KB Output is correct
7 Correct 64 ms 94316 KB Output is correct
8 Correct 64 ms 94316 KB Output is correct
9 Correct 64 ms 94316 KB Output is correct
10 Correct 64 ms 94316 KB Output is correct
11 Correct 64 ms 94316 KB Output is correct
12 Correct 64 ms 94316 KB Output is correct
13 Correct 64 ms 94188 KB Output is correct
14 Correct 65 ms 94316 KB Output is correct
15 Correct 64 ms 94316 KB Output is correct
16 Correct 64 ms 94360 KB Output is correct
17 Correct 64 ms 94292 KB Output is correct
18 Correct 64 ms 94316 KB Output is correct
19 Correct 65 ms 94444 KB Output is correct
20 Correct 65 ms 94444 KB Output is correct
21 Correct 64 ms 94316 KB Output is correct
22 Correct 68 ms 94584 KB Output is correct
23 Correct 68 ms 94444 KB Output is correct
24 Correct 66 ms 94444 KB Output is correct
25 Correct 65 ms 94444 KB Output is correct
26 Correct 65 ms 94444 KB Output is correct
27 Correct 66 ms 94444 KB Output is correct
28 Correct 67 ms 94444 KB Output is correct
29 Correct 65 ms 94444 KB Output is correct
30 Correct 1626 ms 290552 KB Output is correct
31 Correct 1657 ms 270548 KB Output is correct
32 Correct 189 ms 102124 KB Output is correct
33 Correct 730 ms 252568 KB Output is correct
34 Correct 743 ms 252440 KB Output is correct
35 Correct 858 ms 251672 KB Output is correct
36 Correct 1150 ms 250444 KB Output is correct
37 Correct 1351 ms 250836 KB Output is correct
38 Correct 1367 ms 251204 KB Output is correct
39 Correct 1376 ms 251092 KB Output is correct
40 Correct 1414 ms 252884 KB Output is correct
41 Correct 1583 ms 267956 KB Output is correct
42 Correct 1523 ms 258772 KB Output is correct
43 Correct 747 ms 252848 KB Output is correct
44 Correct 65 ms 94444 KB Output is correct
45 Correct 66 ms 94444 KB Output is correct
46 Correct 65 ms 94444 KB Output is correct
47 Correct 74 ms 94444 KB Output is correct
48 Correct 66 ms 94560 KB Output is correct
49 Correct 64 ms 94572 KB Output is correct
50 Correct 65 ms 94444 KB Output is correct
51 Correct 66 ms 94572 KB Output is correct
52 Correct 65 ms 94444 KB Output is correct
53 Correct 64 ms 94316 KB Output is correct
54 Correct 64 ms 94444 KB Output is correct
55 Correct 64 ms 94444 KB Output is correct
56 Correct 67 ms 94444 KB Output is correct
57 Correct 65 ms 94444 KB Output is correct
58 Correct 65 ms 94444 KB Output is correct
59 Correct 65 ms 94444 KB Output is correct
60 Correct 65 ms 94444 KB Output is correct
61 Correct 65 ms 94444 KB Output is correct
62 Correct 69 ms 94444 KB Output is correct
63 Correct 74 ms 94444 KB Output is correct
64 Correct 722 ms 252696 KB Output is correct
65 Correct 647 ms 253336 KB Output is correct
66 Correct 1353 ms 257460 KB Output is correct
67 Correct 1373 ms 257492 KB Output is correct
68 Correct 159 ms 110560 KB Output is correct
69 Correct 172 ms 110564 KB Output is correct
70 Correct 155 ms 110684 KB Output is correct
71 Correct 132 ms 110676 KB Output is correct
72 Correct 115 ms 110932 KB Output is correct
73 Correct 184 ms 111076 KB Output is correct
74 Correct 746 ms 267688 KB Output is correct
75 Correct 769 ms 269592 KB Output is correct
76 Correct 758 ms 259480 KB Output is correct
77 Correct 749 ms 259480 KB Output is correct
78 Correct 813 ms 258696 KB Output is correct
79 Correct 813 ms 258908 KB Output is correct
80 Correct 191 ms 108908 KB Output is correct
81 Correct 1012 ms 259008 KB Output is correct
82 Correct 960 ms 260160 KB Output is correct
83 Correct 1025 ms 257088 KB Output is correct
84 Correct 1150 ms 256936 KB Output is correct
85 Correct 1330 ms 256972 KB Output is correct
86 Correct 1343 ms 257388 KB Output is correct
87 Correct 661 ms 260352 KB Output is correct
88 Correct 790 ms 259224 KB Output is correct
89 Correct 963 ms 257216 KB Output is correct
90 Correct 1403 ms 257460 KB Output is correct
91 Correct 1378 ms 257748 KB Output is correct
92 Correct 1394 ms 258328 KB Output is correct