oj.uz

Submission #384924

# Submission time Handle Problem Language Result Execution time Memory
384924 2021-04-02T16:34:58 Z kshitij_sodani Ancient Books (IOI17_books) C++14
42 / 100
 2000 ms 225484 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"
llo ans=0;
llo n;
vector<llo> adj[1000001];
llo vis[1000001];
pair<llo,llo> cot[1000001];
llo par[1000001];
llo find(llo no){
	if(par[no]==no){
		return no;
	}
	par[no]=find(par[no]);
	return par[no];
}
vector<llo> ss;
void dfs(int no){
	vis[no]=1;
	ss.pb(no);
	for(auto j:adj[no]){
		if(vis[j]==0){
			dfs(j);
		}
	}
}


vector<llo> adj2[1000001];
llo ind[1000001];
pair<llo,llo> pp;
vector<pair<llo,llo>> tt;

llo dp[1001][1001];
pair<llo,llo> 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);
		}
	}
}

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();
//cout<<p.size()<<":"<<endl;
	if(n==0){
		return 0;
	}
	for(int i=0;i<n;i++){
		adj[i].pb(p[i]);
	}
	//llo co=0;
	llo ans=0;
	
	for(int i=0;i<n;i++){
		if(vis[i]==0){
			ss.clear();
			dfs(i);
			/*if(ss.size()==0){
				continue;
			}*/
			llo mi=ss[0];
			llo ma=ss[0];
			for(auto j:ss){
				mi=min(mi,j);
				ma=max(ma,j);
			}
			for(auto j:ss){
				cot[j]={mi,ma};
			}
			for(auto j:ss){
				ind[j]=tt.size();
			}
			tt.pb({mi,ma});
			//co++;
			
			for(int j=0;j+1<ss.size();j++){
				ans+=abs(ss[j]-ss[j+1]);
			}
		/*	for(auto j:ss){
				cout<<j<<",,";
			}
			cout<<endl;*/
			ans+=(abs(ss[0]-ss.back()));
		}
	}
/*	if(s==0){
		sort(tt.begin(),tt.end());
		vector<pair<llo,llo>> tt2;
		for(auto j:tt){
			if(tt2.size()==0){
				tt2.pb(j);
			}
			else{
				if(tt2.back().b<j.a){
					tt2.pb(j);
				}
				else{
					tt2[tt2.size()-1].b=max(tt2[tt2.size()-1].b,j.b);
				}
			}
		}
		llo xx=tt2.size();
		ans+=2*(xx-1);
	 
	 
		//ans+=2*(co-1);
	 
		return ans;
	}*/
	for(int i=0;i<tt.size();i++){
		for(int j=0;j<n;j++){
			if(ind[j]!=i){
				if(j>=tt[i].a and j<=tt[i].b){
					adj2[i].pb(ind[j]);
					//cout<<i<<",,"<<ind[j]<<endl;
				}
			}
		}
	}
	for(int j=0;j<tt.size();j++){
		for(int i=0;i<tt.size();i++){
			vis[i]=0;
		}
		pp=tt[j];
		dfs2(j);
		for(int i=0;i<n;i++){
			if(ind[i]==j){
				rr[i]=pp;
			}
		}
		//cout<<pp.a<<","<<pp.b<<endl;
	}
	//cout<<ans<<":"<<endl;
	pair<llo,llo> 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<llo,llo>> aa;
			vector<pair<llo,llo>> bb;
			pair<llo,llo> cur4=cur3;
			while(cur4.a>0){
				if(rr[cur4.a-1].b>cur3.b){
					break;
				}
				cur4={rr[cur4.a-1].a,max(cur4.b,rr[cur4.a-1].b)};
				aa.pb(cur4);
			}
			cur4=cur3;
			while(cur4.b<n-1){
				if(rr[cur4.b+1].a<cur3.a){
					break;
				}
				cur4={min(rr[cur4.b+1].a,cur4.a),rr[cur4.b+1].b};
				bb.pb(cur4);
			}
			if(aa.size()<bb.size()){
				cur3=aa.back();
				ans+=2*aa.size();

			}
			else{
				cur3=bb.back();
				ans+=2*bb.size();
			}
			
			//cur3={rr[cur3.a-1].a,max(cur3.b,rr[cur3.a-1].b)};
		}
	}






	return ans;
	for(int i=0;i<n;i++){
		for(int j=0;j<n;j++){
			dp[i][j]=-1;
		}
	}
	dp[rr[s].a][rr[s].b]=0;
	for(llo ii=0;ii<n;ii++){
		for(llo i=0;i+ii<n;i++){
			llo j=i+ii;
			if(dp[i][j]==-1){
				continue;
			}
			if(i>0){
				pair<llo,llo> ac={rr[i-1].a,max(rr[i-1].b,j)};
				if(dp[ac.a][ac.b]==-1){
					dp[ac.a][ac.b]=dp[i][j]+2;
				}
				dp[ac.a][ac.b]=min(dp[ac.a][ac.b],dp[i][j]+2);
			}
			if(j<n-1){
				pair<llo,llo> ac={min(rr[j+1].a,i),rr[j+1].b};
				if(dp[ac.a][ac.b]==-1){
					dp[ac.a][ac.b]=dp[i][j]+2;
				}
				dp[ac.a][ac.b]=min(dp[ac.a][ac.b],dp[i][j]+2);




			}
		}
	}
	for(int i=0;i<n;i++){
		for(int j=i+1;j<n;j++){
			if(rr[i].b<rr[j].a){
				continue;
			}
			if(rr[j].b<rr[i].a){
				continue;
			}
			if(rr[j].a<=rr[i].a and rr[i].b<=rr[j].b){
				continue;
			}
			if(rr[i].a<=rr[j].a and rr[j].b<=rr[i].b){
				continue;
			}
			while(true){
				continue;
			}
		}
	}
	/*for(int i=0;i<n;i++){
		for(int j=0;j<n;j++){
			cout<<dp[i][j]<<",";
		}
		cout<<endl;

	}
*/







	//ans+=2*(co-1);
	//cout<<ans<<":"<<endl;
	return ans+dp[0][n-1];
}

Compilation message

books.cpp: In function 'long long int minimum_walk(std::vector<int>, int)':
books.cpp:58:16: 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]
   58 |   if(p.back()+1==p.size()){
      |      ~~~~~~~~~~^~~~~~~~~~
books.cpp:100:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  100 |    for(int j=0;j+1<ss.size();j++){
      |                ~~~^~~~~~~~~~
books.cpp:134:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  134 |  for(int i=0;i<tt.size();i++){
      |              ~^~~~~~~~~~
books.cpp:144:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  144 |  for(int j=0;j<tt.size();j++){
      |              ~^~~~~~~~~~
books.cpp:145:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  145 |   for(int i=0;i<tt.size();i++){
      |               ~^~~~~~~~~~

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 33 ms 47340 KB Output is correct
2 Correct 33 ms 47340 KB Output is correct
3 Correct 33 ms 47340 KB Output is correct
4 Correct 33 ms 47360 KB Output is correct
5 Correct 33 ms 47340 KB Output is correct
6 Correct 33 ms 47340 KB Output is correct
7 Correct 34 ms 47340 KB Output is correct
8 Correct 33 ms 47340 KB Output is correct
9 Correct 33 ms 47340 KB Output is correct
10 Correct 32 ms 47340 KB Output is correct
11 Correct 33 ms 47340 KB Output is correct
12 Correct 32 ms 47340 KB Output is correct
13 Correct 33 ms 47340 KB Output is correct
14 Correct 33 ms 47340 KB Output is correct
15 Correct 33 ms 47340 KB Output is correct
16 Correct 33 ms 47340 KB Output is correct
17 Correct 32 ms 47340 KB Output is correct
18 Correct 39 ms 47340 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 33 ms 47340 KB Output is correct
2 Correct 33 ms 47340 KB Output is correct
3 Correct 33 ms 47340 KB Output is correct
4 Correct 33 ms 47360 KB Output is correct
5 Correct 33 ms 47340 KB Output is correct
6 Correct 33 ms 47340 KB Output is correct
7 Correct 34 ms 47340 KB Output is correct
8 Correct 33 ms 47340 KB Output is correct
9 Correct 33 ms 47340 KB Output is correct
10 Correct 32 ms 47340 KB Output is correct
11 Correct 33 ms 47340 KB Output is correct
12 Correct 32 ms 47340 KB Output is correct
13 Correct 33 ms 47340 KB Output is correct
14 Correct 33 ms 47340 KB Output is correct
15 Correct 33 ms 47340 KB Output is correct
16 Correct 33 ms 47340 KB Output is correct
17 Correct 32 ms 47340 KB Output is correct
18 Correct 39 ms 47340 KB Output is correct
19 Correct 33 ms 47568 KB Output is correct
20 Correct 33 ms 47468 KB Output is correct
21 Correct 33 ms 47260 KB Output is correct
22 Correct 35 ms 47468 KB Output is correct
23 Correct 35 ms 47596 KB Output is correct
24 Correct 34 ms 47468 KB Output is correct
25 Correct 35 ms 47468 KB Output is correct
26 Correct 33 ms 47468 KB Output is correct
27 Correct 33 ms 47468 KB Output is correct
28 Correct 33 ms 47468 KB Output is correct
29 Correct 35 ms 47596 KB Output is correct

Subtask #3
0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 33 ms 47340 KB Output is correct
2 Correct 33 ms 47340 KB Output is correct
3 Correct 33 ms 47340 KB Output is correct
4 Correct 33 ms 47360 KB Output is correct
5 Correct 33 ms 47340 KB Output is correct
6 Correct 33 ms 47340 KB Output is correct
7 Correct 34 ms 47340 KB Output is correct
8 Correct 33 ms 47340 KB Output is correct
9 Correct 33 ms 47340 KB Output is correct
10 Correct 32 ms 47340 KB Output is correct
11 Correct 33 ms 47340 KB Output is correct
12 Correct 32 ms 47340 KB Output is correct
13 Correct 33 ms 47340 KB Output is correct
14 Correct 33 ms 47340 KB Output is correct
15 Correct 33 ms 47340 KB Output is correct
16 Correct 33 ms 47340 KB Output is correct
17 Correct 32 ms 47340 KB Output is correct
18 Correct 39 ms 47340 KB Output is correct
19 Correct 33 ms 47568 KB Output is correct
20 Correct 33 ms 47468 KB Output is correct
21 Correct 33 ms 47260 KB Output is correct
22 Correct 35 ms 47468 KB Output is correct
23 Correct 35 ms 47596 KB Output is correct
24 Correct 34 ms 47468 KB Output is correct
25 Correct 35 ms 47468 KB Output is correct
26 Correct 33 ms 47468 KB Output is correct
27 Correct 33 ms 47468 KB Output is correct
28 Correct 33 ms 47468 KB Output is correct
29 Correct 35 ms 47596 KB Output is correct
30 Correct 662 ms 225484 KB Output is correct
31 Correct 755 ms 224960 KB Output is correct
32 Correct 161 ms 55276 KB Output is correct
33 Execution timed out 2104 ms 128712 KB Time limit exceeded
34 Halted 0 ms 0 KB -

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 35 ms 47468 KB Output is correct
2 Correct 36 ms 47456 KB Output is correct
3 Correct 35 ms 47468 KB Output is correct
4 Correct 35 ms 47468 KB Output is correct
5 Correct 35 ms 47468 KB Output is correct
6 Correct 35 ms 47468 KB Output is correct
7 Correct 35 ms 47468 KB Output is correct
8 Correct 35 ms 47468 KB Output is correct
9 Correct 35 ms 47468 KB Output is correct
10 Correct 33 ms 47340 KB Output is correct
11 Correct 60 ms 49900 KB Output is correct
12 Correct 59 ms 49792 KB Output is correct
13 Correct 36 ms 47596 KB Output is correct
14 Correct 34 ms 47596 KB Output is correct
15 Correct 33 ms 47468 KB Output is correct
16 Correct 34 ms 47468 KB Output is correct
17 Correct 40 ms 48236 KB Output is correct
18 Correct 37 ms 47852 KB Output is correct
19 Correct 35 ms 47596 KB Output is correct
20 Correct 34 ms 47468 KB Output is correct

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 33 ms 47340 KB Output is correct
2 Correct 33 ms 47340 KB Output is correct
3 Correct 33 ms 47340 KB Output is correct
4 Correct 33 ms 47360 KB Output is correct
5 Correct 33 ms 47340 KB Output is correct
6 Correct 33 ms 47340 KB Output is correct
7 Correct 34 ms 47340 KB Output is correct
8 Correct 33 ms 47340 KB Output is correct
9 Correct 33 ms 47340 KB Output is correct
10 Correct 32 ms 47340 KB Output is correct
11 Correct 33 ms 47340 KB Output is correct
12 Correct 32 ms 47340 KB Output is correct
13 Correct 33 ms 47340 KB Output is correct
14 Correct 33 ms 47340 KB Output is correct
15 Correct 33 ms 47340 KB Output is correct
16 Correct 33 ms 47340 KB Output is correct
17 Correct 32 ms 47340 KB Output is correct
18 Correct 39 ms 47340 KB Output is correct
19 Correct 33 ms 47568 KB Output is correct
20 Correct 33 ms 47468 KB Output is correct
21 Correct 33 ms 47260 KB Output is correct
22 Correct 35 ms 47468 KB Output is correct
23 Correct 35 ms 47596 KB Output is correct
24 Correct 34 ms 47468 KB Output is correct
25 Correct 35 ms 47468 KB Output is correct
26 Correct 33 ms 47468 KB Output is correct
27 Correct 33 ms 47468 KB Output is correct
28 Correct 33 ms 47468 KB Output is correct
29 Correct 35 ms 47596 KB Output is correct
30 Correct 662 ms 225484 KB Output is correct
31 Correct 755 ms 224960 KB Output is correct
32 Correct 161 ms 55276 KB Output is correct
33 Execution timed out 2104 ms 128712 KB Time limit exceeded
34 Halted 0 ms 0 KB -