oj.uz

Submission #283832

# Submission time Handle Problem Language Result Execution time Memory
283832 2020-08-26T07:46:02 Z hank55663 Ancient Books (IOI17_books) C++14
42 / 100
 768 ms 432476 KB 
#include "books.h"
#include<bits/stdc++.h>
using namespace std;
#define pii pair<int,int>
#define pb push_back
#define mp make_pair
#define x first
#define y second
int f[1000005];
int l[1000005];
int r[1000005];
int Find(int x){
	if(f[x]==x)return x;
	return f[x]=Find(f[x]);
}
int pre[1000005];
vector<pii> edge[2500005];
int dis[2500005];
int ok[1000005];
int vis[2500005];
int mindex;
struct node{
	node *l,*r;
	//list<int> v;
	int num;
	int a,b;
	node(int _a,int _b):a(_a),b(_b),l(NULL),r(NULL){
		num=mindex++;
	}
}*root;
void build(node *n){
	if(n->a==n->b){
		edge[n->num].pb(mp(n->a,0));
		return;
	}
	int mid=(n->a+n->b)/2;
	n->l=new node(n->a,mid);
	n->r=new node(mid+1,n->b);
	edge[n->num].push_back(mp(n->l->num,0));
	edge[n->num].push_back(mp(n->r->num,0));
	build(n->l);
	build(n->r);
}
void go(node *n,int l,int r,int x){
	if(n->a>=l&&n->b<=r){
		edge[x].push_back(mp(n->num,0));
		return ;
	}
	if(n->b<l||n->a>r)return;
	go(n->l,l,r,x);
	go(n->r,l,r,x);
}
long long minimum_walk(std::vector<int> p, int s) {
//	vector<pii> v;
	mindex=p.size();
	long long ans=0;
	int Min=1e9;
	int over=0;
	for(int i = 0;i<p.size();i++){
		if(p[i]!=i){
//			v.pb(mp(p[i],i));
			ans+=abs(p[i]-i);
		//	Min=min(Min,abs(i-s));
			if((i<s&&p[i]>s)||(i>s&&p[i]<s))over=1;
		}
		l[i]=1e9;
		r[i]=0;
		f[i]=i;
	}
	for(int i = 0;i<p.size();i++){
		f[Find(p[i])]=Find(i);
	}
	for(int i = 0;i<p.size();i++){
		l[Find(i)]=min(l[Find(i)],i);
		r[Find(i)]=max(r[Find(i)],i);
	}
	vector<pii> v;
	root = new node(0,p.size()-1);
	build(root);
	for(int i = 0;i<p.size();i++){
		if(f[i]==i&&l[i]!=r[i]){
			v.pb(mp(l[i],r[i]));
		}
	}
	if(v.empty())return 0;
	sort(v.begin(),v.end());
	int Max=v[0].y;
	ok[v[0].x]=1;
	for(auto it:v){
		if(Max<it.x){
			ok[Max]=1;
			ok[it.x]=1;
		}
		ans+=max(0,(it.x-Max)*2);
		Max=max(Max,it.y);
	}
	ok[Max]=1;
	if(!over){
	//	printf("?\n");
		if(s>Max||s<v[0].x){
			
			Min=max(s-Max,v[0].x-s);
		}
		else{
			//printf("%d ?\n",ans);
			Min=0;
		}
	}
	else{
		for(int i = 0;i<p.size();i++){
			if(p[i]<i){
				go(root,p[i],i,i);
			}
			if(p[i]>i){
				go(root,i,p[i],i);
			}
			if(i!=0){
				edge[i].pb(mp(i-1,1));
			}
			if(i!=p.size()){
				edge[i].pb(mp(i+1,1));
			}
		}
		deque<int> q;
		q.pb(s);
		fill(dis,dis+mindex,1e9);
		dis[s]=0;
		fill(vis,vis+mindex,0);
		while(!q.empty()){
			int x=q.front();
			q.pop_front();
			if(vis[x])continue;
			vis[x]=1;
			for(auto it:edge[x]){
				if(it.y==0){
					if(dis[it.x]>dis[x]){
						dis[it.x]=dis[x];
						q.push_front(it.x);
					}
				}
				else{
					if(dis[it.x]>dis[x]+1){
						dis[it.x]=dis[x]+1;
						q.push_back(it.x);
					}
				}
			}
		}
		for(int i = 0;i<p.size();i++){
			if(ok[i]){
				Min=min(Min,dis[i]);
			}
		}
	}
//	printf("%d\n",Min);
	return ans+Min*2;
}
/*
8
7 3 4 1 2 5 6 0
*/

Compilation message

books.cpp: In constructor 'node::node(int, int)':
books.cpp:26:8: warning: 'node::b' will be initialized after [-Wreorder]
   26 |  int a,b;
      |        ^
books.cpp:23:8: warning:   'node* node::l' [-Wreorder]
   23 |  node *l,*r;
      |        ^
books.cpp:27:2: warning:   when initialized here [-Wreorder]
   27 |  node(int _a,int _b):a(_a),b(_b),l(NULL),r(NULL){
      |  ^~~~
books.cpp: In function 'long long int minimum_walk(std::vector<int>, int)':
books.cpp:59:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   59 |  for(int i = 0;i<p.size();i++){
      |                ~^~~~~~~~~
books.cpp:70:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   70 |  for(int i = 0;i<p.size();i++){
      |                ~^~~~~~~~~
books.cpp:73:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   73 |  for(int i = 0;i<p.size();i++){
      |                ~^~~~~~~~~
books.cpp:80:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   80 |  for(int i = 0;i<p.size();i++){
      |                ~^~~~~~~~~
books.cpp:110:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  110 |   for(int i = 0;i<p.size();i++){
      |                 ~^~~~~~~~~
books.cpp:120:8: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  120 |    if(i!=p.size()){
      |       ~^~~~~~~~~~
books.cpp:149:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  149 |   for(int i = 0;i<p.size();i++){
      |                 ~^~~~~~~~~

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 38 ms 59000 KB Output is correct
2 Correct 38 ms 59136 KB Output is correct
3 Correct 37 ms 59008 KB Output is correct
4 Correct 38 ms 59104 KB Output is correct
5 Correct 38 ms 59008 KB Output is correct
6 Correct 38 ms 59008 KB Output is correct
7 Correct 37 ms 59008 KB Output is correct
8 Correct 39 ms 59040 KB Output is correct
9 Correct 38 ms 59000 KB Output is correct
10 Correct 38 ms 59224 KB Output is correct
11 Correct 37 ms 59008 KB Output is correct
12 Correct 38 ms 59000 KB Output is correct
13 Correct 37 ms 59008 KB Output is correct
14 Correct 40 ms 59000 KB Output is correct
15 Correct 40 ms 59128 KB Output is correct
16 Correct 38 ms 59008 KB Output is correct
17 Correct 38 ms 59000 KB Output is correct
18 Correct 38 ms 59008 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 38 ms 59000 KB Output is correct
2 Correct 38 ms 59136 KB Output is correct
3 Correct 37 ms 59008 KB Output is correct
4 Correct 38 ms 59104 KB Output is correct
5 Correct 38 ms 59008 KB Output is correct
6 Correct 38 ms 59008 KB Output is correct
7 Correct 37 ms 59008 KB Output is correct
8 Correct 39 ms 59040 KB Output is correct
9 Correct 38 ms 59000 KB Output is correct
10 Correct 38 ms 59224 KB Output is correct
11 Correct 37 ms 59008 KB Output is correct
12 Correct 38 ms 59000 KB Output is correct
13 Correct 37 ms 59008 KB Output is correct
14 Correct 40 ms 59000 KB Output is correct
15 Correct 40 ms 59128 KB Output is correct
16 Correct 38 ms 59008 KB Output is correct
17 Correct 38 ms 59000 KB Output is correct
18 Correct 38 ms 59008 KB Output is correct
19 Correct 37 ms 59256 KB Output is correct
20 Correct 38 ms 59256 KB Output is correct
21 Correct 39 ms 59256 KB Output is correct
22 Correct 39 ms 59256 KB Output is correct
23 Correct 38 ms 59264 KB Output is correct
24 Correct 40 ms 59420 KB Output is correct
25 Correct 37 ms 59256 KB Output is correct
26 Correct 38 ms 59300 KB Output is correct
27 Correct 39 ms 59256 KB Output is correct
28 Correct 38 ms 59264 KB Output is correct
29 Correct 38 ms 59264 KB Output is correct

Subtask #3
0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 38 ms 59000 KB Output is correct
2 Correct 38 ms 59136 KB Output is correct
3 Correct 37 ms 59008 KB Output is correct
4 Correct 38 ms 59104 KB Output is correct
5 Correct 38 ms 59008 KB Output is correct
6 Correct 38 ms 59008 KB Output is correct
7 Correct 37 ms 59008 KB Output is correct
8 Correct 39 ms 59040 KB Output is correct
9 Correct 38 ms 59000 KB Output is correct
10 Correct 38 ms 59224 KB Output is correct
11 Correct 37 ms 59008 KB Output is correct
12 Correct 38 ms 59000 KB Output is correct
13 Correct 37 ms 59008 KB Output is correct
14 Correct 40 ms 59000 KB Output is correct
15 Correct 40 ms 59128 KB Output is correct
16 Correct 38 ms 59008 KB Output is correct
17 Correct 38 ms 59000 KB Output is correct
18 Correct 38 ms 59008 KB Output is correct
19 Correct 37 ms 59256 KB Output is correct
20 Correct 38 ms 59256 KB Output is correct
21 Correct 39 ms 59256 KB Output is correct
22 Correct 39 ms 59256 KB Output is correct
23 Correct 38 ms 59264 KB Output is correct
24 Correct 40 ms 59420 KB Output is correct
25 Correct 37 ms 59256 KB Output is correct
26 Correct 38 ms 59300 KB Output is correct
27 Correct 39 ms 59256 KB Output is correct
28 Correct 38 ms 59264 KB Output is correct
29 Correct 38 ms 59264 KB Output is correct
30 Runtime error 768 ms 432476 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 42 ms 59256 KB Output is correct
2 Correct 42 ms 59388 KB Output is correct
3 Correct 41 ms 59384 KB Output is correct
4 Correct 41 ms 59256 KB Output is correct
5 Correct 41 ms 59256 KB Output is correct
6 Correct 41 ms 59384 KB Output is correct
7 Correct 41 ms 59256 KB Output is correct
8 Correct 41 ms 59384 KB Output is correct
9 Correct 40 ms 59384 KB Output is correct
10 Correct 40 ms 59264 KB Output is correct
11 Correct 42 ms 59384 KB Output is correct
12 Correct 41 ms 59384 KB Output is correct
13 Correct 41 ms 59384 KB Output is correct
14 Correct 42 ms 59384 KB Output is correct
15 Correct 42 ms 59384 KB Output is correct
16 Correct 42 ms 59384 KB Output is correct
17 Correct 42 ms 59388 KB Output is correct
18 Correct 41 ms 59384 KB Output is correct
19 Correct 41 ms 59384 KB Output is correct
20 Correct 41 ms 59384 KB Output is correct

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 38 ms 59000 KB Output is correct
2 Correct 38 ms 59136 KB Output is correct
3 Correct 37 ms 59008 KB Output is correct
4 Correct 38 ms 59104 KB Output is correct
5 Correct 38 ms 59008 KB Output is correct
6 Correct 38 ms 59008 KB Output is correct
7 Correct 37 ms 59008 KB Output is correct
8 Correct 39 ms 59040 KB Output is correct
9 Correct 38 ms 59000 KB Output is correct
10 Correct 38 ms 59224 KB Output is correct
11 Correct 37 ms 59008 KB Output is correct
12 Correct 38 ms 59000 KB Output is correct
13 Correct 37 ms 59008 KB Output is correct
14 Correct 40 ms 59000 KB Output is correct
15 Correct 40 ms 59128 KB Output is correct
16 Correct 38 ms 59008 KB Output is correct
17 Correct 38 ms 59000 KB Output is correct
18 Correct 38 ms 59008 KB Output is correct
19 Correct 37 ms 59256 KB Output is correct
20 Correct 38 ms 59256 KB Output is correct
21 Correct 39 ms 59256 KB Output is correct
22 Correct 39 ms 59256 KB Output is correct
23 Correct 38 ms 59264 KB Output is correct
24 Correct 40 ms 59420 KB Output is correct
25 Correct 37 ms 59256 KB Output is correct
26 Correct 38 ms 59300 KB Output is correct
27 Correct 39 ms 59256 KB Output is correct
28 Correct 38 ms 59264 KB Output is correct
29 Correct 38 ms 59264 KB Output is correct
30 Runtime error 768 ms 432476 KB Execution killed with signal 11
31 Halted 0 ms 0 KB -