oj.uz

Submission #384953

# Submission time Handle Problem Language Result Execution time Memory
384953 2021-04-02T18:07:29 Z kshitij_sodani Ancient Books (IOI17_books) C++14
42 / 100
 1923 ms 518228 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*100001];
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*100001];
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;
		}
	}
	n=p.size();
	if(n==0){
		return 0;
	}
	for(int i=0;i<n;i++){
		adj[i].pb(p[i]);
	}
	//int co=0;
	llo ans=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];
		}
	}


	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=0;
			while(cur4.a>0 and cur5.b<n-1){
				if(rr[cur4.a-1].b>cur3.b){
					st=0;
					break;
				}
				if(rr[cur5.b+1].a<cur3.a){
					st=1;
					break;
				}
				

				cur4={rr[cur4.a-1].a,max(cur4.b,rr[cur4.a-1].b)};
				aa.pb(cur4);
				cur5={min(rr[cur5.b+1].a,cur5.a),rr[cur5.b+1].b};
				bb.pb(cur5);
			}
			if(cur5.b==n-1){
				st=1;
			}
			
			/*while(cur5.b<n-1){
				
			}*/
			if(st==0){
				cur3=aa.back();
				ans+=(llo)2*aa.size();
			}
			else{
				cur3=bb.back();
				ans+=(llo)2*bb.size();
			}
			
			//cur3={rr[cur3.a-1].a,max(cur3.b,rr[cur3.a-1].b)};
		}
	}






	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:160:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  160 |    for(int j=0;j+1<ss.size();j++){
      |                ~~~^~~~~~~~~~
books.cpp:167:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  167 |    for(int j=0;j+1<ss.size();j++){
      |                ~~~^~~~~~~~~~
books.cpp:170:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  170 |    for(int j=0;j+1<ss.size();j++){
      |                ~~~^~~~~~~~~~
books.cpp:198:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  198 |  for(int i=0;i<tt.size();i++){
      |              ~^~~~~~~~~~

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 65 ms 94316 KB Output is correct
2 Correct 64 ms 94316 KB Output is correct
3 Correct 65 ms 94316 KB Output is correct
4 Correct 64 ms 94316 KB Output is correct
5 Correct 64 ms 94444 KB Output is correct
6 Correct 66 ms 94316 KB Output is correct
7 Correct 64 ms 94316 KB Output is correct
8 Correct 66 ms 94316 KB Output is correct
9 Correct 65 ms 94316 KB Output is correct
10 Correct 65 ms 94316 KB Output is correct
11 Correct 64 ms 94316 KB Output is correct
12 Correct 65 ms 94316 KB Output is correct
13 Correct 65 ms 94316 KB Output is correct
14 Correct 66 ms 94316 KB Output is correct
15 Correct 73 ms 94316 KB Output is correct
16 Correct 65 ms 94340 KB Output is correct
17 Correct 67 ms 94444 KB Output is correct
18 Correct 66 ms 94316 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 65 ms 94316 KB Output is correct
2 Correct 64 ms 94316 KB Output is correct
3 Correct 65 ms 94316 KB Output is correct
4 Correct 64 ms 94316 KB Output is correct
5 Correct 64 ms 94444 KB Output is correct
6 Correct 66 ms 94316 KB Output is correct
7 Correct 64 ms 94316 KB Output is correct
8 Correct 66 ms 94316 KB Output is correct
9 Correct 65 ms 94316 KB Output is correct
10 Correct 65 ms 94316 KB Output is correct
11 Correct 64 ms 94316 KB Output is correct
12 Correct 65 ms 94316 KB Output is correct
13 Correct 65 ms 94316 KB Output is correct
14 Correct 66 ms 94316 KB Output is correct
15 Correct 73 ms 94316 KB Output is correct
16 Correct 65 ms 94340 KB Output is correct
17 Correct 67 ms 94444 KB Output is correct
18 Correct 66 ms 94316 KB Output is correct
19 Correct 65 ms 94444 KB Output is correct
20 Correct 67 ms 94444 KB Output is correct
21 Correct 64 ms 94316 KB Output is correct
22 Correct 66 ms 94444 KB Output is correct
23 Correct 65 ms 94444 KB Output is correct
24 Correct 65 ms 94444 KB Output is correct
25 Correct 65 ms 94444 KB Output is correct
26 Correct 66 ms 94444 KB Output is correct
27 Correct 65 ms 94444 KB Output is correct
28 Correct 67 ms 94444 KB Output is correct
29 Correct 67 ms 94444 KB Output is correct

Subtask #3
0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 65 ms 94316 KB Output is correct
2 Correct 64 ms 94316 KB Output is correct
3 Correct 65 ms 94316 KB Output is correct
4 Correct 64 ms 94316 KB Output is correct
5 Correct 64 ms 94444 KB Output is correct
6 Correct 66 ms 94316 KB Output is correct
7 Correct 64 ms 94316 KB Output is correct
8 Correct 66 ms 94316 KB Output is correct
9 Correct 65 ms 94316 KB Output is correct
10 Correct 65 ms 94316 KB Output is correct
11 Correct 64 ms 94316 KB Output is correct
12 Correct 65 ms 94316 KB Output is correct
13 Correct 65 ms 94316 KB Output is correct
14 Correct 66 ms 94316 KB Output is correct
15 Correct 73 ms 94316 KB Output is correct
16 Correct 65 ms 94340 KB Output is correct
17 Correct 67 ms 94444 KB Output is correct
18 Correct 66 ms 94316 KB Output is correct
19 Correct 65 ms 94444 KB Output is correct
20 Correct 67 ms 94444 KB Output is correct
21 Correct 64 ms 94316 KB Output is correct
22 Correct 66 ms 94444 KB Output is correct
23 Correct 65 ms 94444 KB Output is correct
24 Correct 65 ms 94444 KB Output is correct
25 Correct 65 ms 94444 KB Output is correct
26 Correct 66 ms 94444 KB Output is correct
27 Correct 65 ms 94444 KB Output is correct
28 Correct 67 ms 94444 KB Output is correct
29 Correct 67 ms 94444 KB Output is correct
30 Runtime error 1923 ms 518228 KB Execution killed with signal 11
31 Halted 0 ms 0 KB -

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 67 ms 94444 KB Output is correct
2 Correct 66 ms 94532 KB Output is correct
3 Correct 69 ms 94444 KB Output is correct
4 Correct 65 ms 94572 KB Output is correct
5 Correct 65 ms 94444 KB Output is correct
6 Correct 65 ms 94444 KB Output is correct
7 Correct 65 ms 94444 KB Output is correct
8 Correct 65 ms 94444 KB Output is correct
9 Correct 65 ms 94444 KB Output is correct
10 Correct 64 ms 94316 KB Output is correct
11 Correct 70 ms 94572 KB Output is correct
12 Correct 66 ms 94444 KB Output is correct
13 Correct 66 ms 94444 KB Output is correct
14 Correct 65 ms 94444 KB Output is correct
15 Correct 66 ms 94444 KB Output is correct
16 Correct 65 ms 94444 KB Output is correct
17 Correct 66 ms 94444 KB Output is correct
18 Correct 66 ms 94444 KB Output is correct
19 Correct 65 ms 94572 KB Output is correct
20 Correct 66 ms 94444 KB Output is correct

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 65 ms 94316 KB Output is correct
2 Correct 64 ms 94316 KB Output is correct
3 Correct 65 ms 94316 KB Output is correct
4 Correct 64 ms 94316 KB Output is correct
5 Correct 64 ms 94444 KB Output is correct
6 Correct 66 ms 94316 KB Output is correct
7 Correct 64 ms 94316 KB Output is correct
8 Correct 66 ms 94316 KB Output is correct
9 Correct 65 ms 94316 KB Output is correct
10 Correct 65 ms 94316 KB Output is correct
11 Correct 64 ms 94316 KB Output is correct
12 Correct 65 ms 94316 KB Output is correct
13 Correct 65 ms 94316 KB Output is correct
14 Correct 66 ms 94316 KB Output is correct
15 Correct 73 ms 94316 KB Output is correct
16 Correct 65 ms 94340 KB Output is correct
17 Correct 67 ms 94444 KB Output is correct
18 Correct 66 ms 94316 KB Output is correct
19 Correct 65 ms 94444 KB Output is correct
20 Correct 67 ms 94444 KB Output is correct
21 Correct 64 ms 94316 KB Output is correct
22 Correct 66 ms 94444 KB Output is correct
23 Correct 65 ms 94444 KB Output is correct
24 Correct 65 ms 94444 KB Output is correct
25 Correct 65 ms 94444 KB Output is correct
26 Correct 66 ms 94444 KB Output is correct
27 Correct 65 ms 94444 KB Output is correct
28 Correct 67 ms 94444 KB Output is correct
29 Correct 67 ms 94444 KB Output is correct
30 Runtime error 1923 ms 518228 KB Execution killed with signal 11
31 Halted 0 ms 0 KB -