oj.uz

Submission #384916

# Submission time Handle Problem Language Result Execution time Memory
384916 2021-04-02T16:22:51 Z kshitij_sodani Ancient Books (IOI17_books) C++14
50 / 100
 558 ms 164684 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;
	}
	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.b-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{
			ans+=2;
			if(rr[cur3.a-1].b>=cur3.b){

				cur3={rr[cur3.a-1].a,max(cur3.b,rr[cur3.b-1].b)};
				continue;
			}
			else if(rr[cur3.b+1].a<=cur3.a){

				cur3={min(rr[cur3.b+1].a,cur3.a),rr[cur3.b+1].b};
				continue;
			}
			ans+=2;
			cur3={rr[cur3.a-1].a,max(cur3.b,rr[cur3.b-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 32 ms 47340 KB Output is correct
2 Correct 33 ms 47340 KB Output is correct
3 Correct 35 ms 47340 KB Output is correct
4 Correct 32 ms 47340 KB Output is correct
5 Correct 34 ms 47360 KB Output is correct
6 Correct 33 ms 47340 KB Output is correct
7 Correct 37 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 33 ms 47340 KB Output is correct
11 Correct 34 ms 47356 KB Output is correct
12 Correct 33 ms 47340 KB Output is correct
13 Correct 33 ms 47340 KB Output is correct
14 Correct 32 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 34 ms 47340 KB Output is correct
18 Correct 33 ms 47340 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 32 ms 47340 KB Output is correct
2 Correct 33 ms 47340 KB Output is correct
3 Correct 35 ms 47340 KB Output is correct
4 Correct 32 ms 47340 KB Output is correct
5 Correct 34 ms 47360 KB Output is correct
6 Correct 33 ms 47340 KB Output is correct
7 Correct 37 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 33 ms 47340 KB Output is correct
11 Correct 34 ms 47356 KB Output is correct
12 Correct 33 ms 47340 KB Output is correct
13 Correct 33 ms 47340 KB Output is correct
14 Correct 32 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 34 ms 47340 KB Output is correct
18 Correct 33 ms 47340 KB Output is correct
19 Correct 33 ms 47468 KB Output is correct
20 Correct 34 ms 47468 KB Output is correct
21 Correct 34 ms 47340 KB Output is correct
22 Correct 34 ms 47468 KB Output is correct
23 Correct 33 ms 47468 KB Output is correct
24 Correct 33 ms 47468 KB Output is correct
25 Correct 33 ms 47468 KB Output is correct
26 Correct 33 ms 47468 KB Output is correct
27 Correct 34 ms 47340 KB Output is correct
28 Correct 33 ms 47340 KB Output is correct
29 Correct 33 ms 47596 KB Output is correct

Subtask #3
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 32 ms 47340 KB Output is correct
2 Correct 33 ms 47340 KB Output is correct
3 Correct 35 ms 47340 KB Output is correct
4 Correct 32 ms 47340 KB Output is correct
5 Correct 34 ms 47360 KB Output is correct
6 Correct 33 ms 47340 KB Output is correct
7 Correct 37 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 33 ms 47340 KB Output is correct
11 Correct 34 ms 47356 KB Output is correct
12 Correct 33 ms 47340 KB Output is correct
13 Correct 33 ms 47340 KB Output is correct
14 Correct 32 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 34 ms 47340 KB Output is correct
18 Correct 33 ms 47340 KB Output is correct
19 Correct 33 ms 47468 KB Output is correct
20 Correct 34 ms 47468 KB Output is correct
21 Correct 34 ms 47340 KB Output is correct
22 Correct 34 ms 47468 KB Output is correct
23 Correct 33 ms 47468 KB Output is correct
24 Correct 33 ms 47468 KB Output is correct
25 Correct 33 ms 47468 KB Output is correct
26 Correct 33 ms 47468 KB Output is correct
27 Correct 34 ms 47340 KB Output is correct
28 Correct 33 ms 47340 KB Output is correct
29 Correct 33 ms 47596 KB Output is correct
30 Correct 558 ms 164684 KB Output is correct
31 Correct 537 ms 143320 KB Output is correct
32 Correct 161 ms 59244 KB Output is correct
33 Correct 304 ms 157368 KB Output is correct
34 Correct 306 ms 157328 KB Output is correct
35 Correct 299 ms 145848 KB Output is correct
36 Correct 284 ms 132012 KB Output is correct
37 Correct 300 ms 122732 KB Output is correct
38 Correct 313 ms 122604 KB Output is correct
39 Correct 317 ms 122476 KB Output is correct
40 Correct 323 ms 124136 KB Output is correct
41 Correct 477 ms 140376 KB Output is correct
42 Correct 442 ms 130656 KB Output is correct
43 Correct 308 ms 133712 KB Output is correct

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 36 ms 47468 KB 3rd lines differ - on the 1st token, expected: '3304', found: '4624'
2 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 32 ms 47340 KB Output is correct
2 Correct 33 ms 47340 KB Output is correct
3 Correct 35 ms 47340 KB Output is correct
4 Correct 32 ms 47340 KB Output is correct
5 Correct 34 ms 47360 KB Output is correct
6 Correct 33 ms 47340 KB Output is correct
7 Correct 37 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 33 ms 47340 KB Output is correct
11 Correct 34 ms 47356 KB Output is correct
12 Correct 33 ms 47340 KB Output is correct
13 Correct 33 ms 47340 KB Output is correct
14 Correct 32 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 34 ms 47340 KB Output is correct
18 Correct 33 ms 47340 KB Output is correct
19 Correct 33 ms 47468 KB Output is correct
20 Correct 34 ms 47468 KB Output is correct
21 Correct 34 ms 47340 KB Output is correct
22 Correct 34 ms 47468 KB Output is correct
23 Correct 33 ms 47468 KB Output is correct
24 Correct 33 ms 47468 KB Output is correct
25 Correct 33 ms 47468 KB Output is correct
26 Correct 33 ms 47468 KB Output is correct
27 Correct 34 ms 47340 KB Output is correct
28 Correct 33 ms 47340 KB Output is correct
29 Correct 33 ms 47596 KB Output is correct
30 Correct 558 ms 164684 KB Output is correct
31 Correct 537 ms 143320 KB Output is correct
32 Correct 161 ms 59244 KB Output is correct
33 Correct 304 ms 157368 KB Output is correct
34 Correct 306 ms 157328 KB Output is correct
35 Correct 299 ms 145848 KB Output is correct
36 Correct 284 ms 132012 KB Output is correct
37 Correct 300 ms 122732 KB Output is correct
38 Correct 313 ms 122604 KB Output is correct
39 Correct 317 ms 122476 KB Output is correct
40 Correct 323 ms 124136 KB Output is correct
41 Correct 477 ms 140376 KB Output is correct
42 Correct 442 ms 130656 KB Output is correct
43 Correct 308 ms 133712 KB Output is correct
44 Incorrect 36 ms 47468 KB 3rd lines differ - on the 1st token, expected: '3304', found: '4624'
45 Halted 0 ms 0 KB -