oj.uz

Submission #1049614

# Submission time Handle Problem Language Result Execution time Memory
1049614 2024-08-09T02:22:46 Z pcc Ancient Books (IOI17_books) C++17
100 / 100
 1126 ms 425116 KB 
#include "books.h"
#include <bits/stdc++.h>
using namespace std;

#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,popcnt,sse4")
#define pii pair<int,int>
#define ll long long
const int mxn = 1e6+10;
const int LEN = mxn*20;
int N;

int nid[LEN],to[LEN],wei[LEN],head[LEN];
int d1[LEN],d2[LEN];
ll ans = 0;
bitset<LEN> vis;
int ecnt,vcnt;
int seg[mxn*4];

void add_edge(int a,int b,int w){
	//cerr<<"ADD_EDGE: "<<a<<' '<<b<<' '<<w<<endl;
	ecnt++;
	nid[ecnt] = head[a];
	head[a] = ecnt;
	to[ecnt] = b;
	wei[ecnt] = w;
	return;
}

void build(int now,int l,int r){
	if(l == r){
		seg[now] = l;
		return;
	}
	seg[now] = vcnt++;
	int mid = (l+r)>>1;
	build(now*2+1,l,mid);
	build(now*2+2,mid+1,r);
	add_edge(seg[now*2+1],seg[now],0);
	add_edge(seg[now*2+2],seg[now],0);
	//cerr<<l<<' '<<r<<"::"<<seg[now]<<":"<<seg[now*2+1]<<' '<<seg[now*2+2]<<endl;
	return;
}

void add(int now,int l,int r,int s,int e,int p){
	if(l>=s&&e>=r){
		//cerr<<l<<' '<<r<<":"<<p<<endl;
		add_edge(seg[now],p,0);
		return;
	}
	int mid = (l+r)>>1;
	if(mid>=s)add(now*2+1,l,mid,s,e,p);
	if(mid<e)add(now*2+2,mid+1,r,s,e,p);
	return;
}

vector<int> bucket[mxn*2];
void DIJKSTRA(int dist[]){
	for(auto &i:bucket)i.clear();
	for(int i = 0;i<vcnt;i++){
		bucket[dist[i]].push_back(i);
	}
	vis.reset();
	for(int d = 0;d<mxn*2;d++){
		while(!bucket[d].empty()){
			auto now = bucket[d].back();bucket[d].pop_back();
			if(vis[now])continue;
			vis[now] = true;
			for(int eid = head[now];eid;eid = nid[eid]){
				int nxt = to[eid],w = wei[eid];
				if(dist[nxt]>dist[now]+w){
					dist[nxt] = dist[now]+w;
					bucket[dist[nxt]].push_back(nxt);
				}
			}
		}
	}
	return;
}

long long minimum_walk(std::vector<int> p, int s) {
	N = p.size();
	vcnt = N;
	for(int i = 0;i+1<N;i++){
		add_edge(i,i+1,1);
		add_edge(i+1,i,1);
	}
	build(0,0,N-1);
	for(int i = 0;i<p.size();i++){
		ans += abs(i-p[i]);
		if(vis[i])continue;
		int now = i;
		int lp = i,rp = i;
		do{
			lp = min(lp,now);
			rp = max(rp,now);
			vis[now] = true;
			now = p[now];
		}while(now != i);
		int tar = vcnt++;
		add(0,0,N-1,lp,rp,tar);
		do{
			add_edge(tar,now,0);
			now = p[now];
		}while(now != i);
	}
	fill(d1,d1+LEN,mxn*2-1);
	fill(d2,d2+LEN,mxn*2-1);
	int tl = s,tr = s;
	for(int i = 0;i<N;i++){
		if(p[i] != i)tl = min(tl,i),tr = max(tr,i);
	}
	//cerr<<tl<<','<<tr<<endl;
	d1[tl] = d2[tr] = 0;
	DIJKSTRA(d1);
	DIJKSTRA(d2);
	//for(int i = 0;i<vcnt;i++)cerr<<d1[i]<<' ';cerr<<endl;
	//for(int i = 0;i<vcnt;i++)cerr<<d2[i]<<' ';cerr<<endl;
	for(int i = 0;i<vcnt;i++)d1[i] += d2[i];
	DIJKSTRA(d1);
	//for(int i = 0;i<vcnt;i++)cerr<<d1[i]<<' ';cerr<<endl;
	return ans+d1[s]*2;
}

Compilation message

books.cpp: In function 'long long int minimum_walk(std::vector<int>, int)':
books.cpp:89:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   89 |  for(int i = 0;i<p.size();i++){
      |                ~^~~~~~~~~

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 61 ms 213812 KB Output is correct
2 Correct 60 ms 213588 KB Output is correct
3 Correct 66 ms 213596 KB Output is correct
4 Correct 61 ms 213840 KB Output is correct
5 Correct 61 ms 213584 KB Output is correct
6 Correct 62 ms 213584 KB Output is correct
7 Correct 62 ms 213588 KB Output is correct
8 Correct 71 ms 213656 KB Output is correct
9 Correct 61 ms 213728 KB Output is correct
10 Correct 61 ms 213588 KB Output is correct
11 Correct 61 ms 213584 KB Output is correct
12 Correct 61 ms 213632 KB Output is correct
13 Correct 68 ms 213644 KB Output is correct
14 Correct 62 ms 213668 KB Output is correct
15 Correct 73 ms 213584 KB Output is correct
16 Correct 63 ms 213588 KB Output is correct
17 Correct 60 ms 213840 KB Output is correct
18 Correct 67 ms 213584 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 61 ms 213812 KB Output is correct
2 Correct 60 ms 213588 KB Output is correct
3 Correct 66 ms 213596 KB Output is correct
4 Correct 61 ms 213840 KB Output is correct
5 Correct 61 ms 213584 KB Output is correct
6 Correct 62 ms 213584 KB Output is correct
7 Correct 62 ms 213588 KB Output is correct
8 Correct 71 ms 213656 KB Output is correct
9 Correct 61 ms 213728 KB Output is correct
10 Correct 61 ms 213588 KB Output is correct
11 Correct 61 ms 213584 KB Output is correct
12 Correct 61 ms 213632 KB Output is correct
13 Correct 68 ms 213644 KB Output is correct
14 Correct 62 ms 213668 KB Output is correct
15 Correct 73 ms 213584 KB Output is correct
16 Correct 63 ms 213588 KB Output is correct
17 Correct 60 ms 213840 KB Output is correct
18 Correct 67 ms 213584 KB Output is correct
19 Correct 63 ms 213840 KB Output is correct
20 Correct 60 ms 213840 KB Output is correct
21 Correct 62 ms 213840 KB Output is correct
22 Correct 61 ms 213840 KB Output is correct
23 Correct 62 ms 213840 KB Output is correct
24 Correct 64 ms 213840 KB Output is correct
25 Correct 64 ms 213840 KB Output is correct
26 Correct 60 ms 213840 KB Output is correct
27 Correct 64 ms 213840 KB Output is correct
28 Correct 62 ms 213840 KB Output is correct
29 Correct 61 ms 213844 KB Output is correct

Subtask #3
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 61 ms 213812 KB Output is correct
2 Correct 60 ms 213588 KB Output is correct
3 Correct 66 ms 213596 KB Output is correct
4 Correct 61 ms 213840 KB Output is correct
5 Correct 61 ms 213584 KB Output is correct
6 Correct 62 ms 213584 KB Output is correct
7 Correct 62 ms 213588 KB Output is correct
8 Correct 71 ms 213656 KB Output is correct
9 Correct 61 ms 213728 KB Output is correct
10 Correct 61 ms 213588 KB Output is correct
11 Correct 61 ms 213584 KB Output is correct
12 Correct 61 ms 213632 KB Output is correct
13 Correct 68 ms 213644 KB Output is correct
14 Correct 62 ms 213668 KB Output is correct
15 Correct 73 ms 213584 KB Output is correct
16 Correct 63 ms 213588 KB Output is correct
17 Correct 60 ms 213840 KB Output is correct
18 Correct 67 ms 213584 KB Output is correct
19 Correct 63 ms 213840 KB Output is correct
20 Correct 60 ms 213840 KB Output is correct
21 Correct 62 ms 213840 KB Output is correct
22 Correct 61 ms 213840 KB Output is correct
23 Correct 62 ms 213840 KB Output is correct
24 Correct 64 ms 213840 KB Output is correct
25 Correct 64 ms 213840 KB Output is correct
26 Correct 60 ms 213840 KB Output is correct
27 Correct 64 ms 213840 KB Output is correct
28 Correct 62 ms 213840 KB Output is correct
29 Correct 61 ms 213844 KB Output is correct
30 Correct 532 ms 311216 KB Output is correct
31 Correct 523 ms 314984 KB Output is correct
32 Correct 410 ms 377496 KB Output is correct
33 Correct 368 ms 350556 KB Output is correct
34 Correct 417 ms 350460 KB Output is correct
35 Correct 375 ms 344220 KB Output is correct
36 Correct 324 ms 333464 KB Output is correct
37 Correct 273 ms 321644 KB Output is correct
38 Correct 268 ms 319088 KB Output is correct
39 Correct 270 ms 318812 KB Output is correct
40 Correct 327 ms 321196 KB Output is correct
41 Correct 365 ms 321708 KB Output is correct
42 Correct 357 ms 322636 KB Output is correct
43 Correct 888 ms 345244 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 62 ms 213844 KB Output is correct
2 Correct 64 ms 213844 KB Output is correct
3 Correct 62 ms 213840 KB Output is correct
4 Correct 79 ms 213844 KB Output is correct
5 Correct 65 ms 213892 KB Output is correct
6 Correct 65 ms 213840 KB Output is correct
7 Correct 61 ms 213840 KB Output is correct
8 Correct 67 ms 213840 KB Output is correct
9 Correct 70 ms 213860 KB Output is correct
10 Correct 64 ms 213880 KB Output is correct
11 Correct 63 ms 213840 KB Output is correct
12 Correct 63 ms 213832 KB Output is correct
13 Correct 64 ms 213840 KB Output is correct
14 Correct 73 ms 213840 KB Output is correct
15 Correct 62 ms 213840 KB Output is correct
16 Correct 66 ms 213840 KB Output is correct
17 Correct 64 ms 213840 KB Output is correct
18 Correct 62 ms 213840 KB Output is correct
19 Correct 63 ms 213760 KB Output is correct
20 Correct 63 ms 213696 KB Output is correct

Subtask #5
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 61 ms 213812 KB Output is correct
2 Correct 60 ms 213588 KB Output is correct
3 Correct 66 ms 213596 KB Output is correct
4 Correct 61 ms 213840 KB Output is correct
5 Correct 61 ms 213584 KB Output is correct
6 Correct 62 ms 213584 KB Output is correct
7 Correct 62 ms 213588 KB Output is correct
8 Correct 71 ms 213656 KB Output is correct
9 Correct 61 ms 213728 KB Output is correct
10 Correct 61 ms 213588 KB Output is correct
11 Correct 61 ms 213584 KB Output is correct
12 Correct 61 ms 213632 KB Output is correct
13 Correct 68 ms 213644 KB Output is correct
14 Correct 62 ms 213668 KB Output is correct
15 Correct 73 ms 213584 KB Output is correct
16 Correct 63 ms 213588 KB Output is correct
17 Correct 60 ms 213840 KB Output is correct
18 Correct 67 ms 213584 KB Output is correct
19 Correct 63 ms 213840 KB Output is correct
20 Correct 60 ms 213840 KB Output is correct
21 Correct 62 ms 213840 KB Output is correct
22 Correct 61 ms 213840 KB Output is correct
23 Correct 62 ms 213840 KB Output is correct
24 Correct 64 ms 213840 KB Output is correct
25 Correct 64 ms 213840 KB Output is correct
26 Correct 60 ms 213840 KB Output is correct
27 Correct 64 ms 213840 KB Output is correct
28 Correct 62 ms 213840 KB Output is correct
29 Correct 61 ms 213844 KB Output is correct
30 Correct 532 ms 311216 KB Output is correct
31 Correct 523 ms 314984 KB Output is correct
32 Correct 410 ms 377496 KB Output is correct
33 Correct 368 ms 350556 KB Output is correct
34 Correct 417 ms 350460 KB Output is correct
35 Correct 375 ms 344220 KB Output is correct
36 Correct 324 ms 333464 KB Output is correct
37 Correct 273 ms 321644 KB Output is correct
38 Correct 268 ms 319088 KB Output is correct
39 Correct 270 ms 318812 KB Output is correct
40 Correct 327 ms 321196 KB Output is correct
41 Correct 365 ms 321708 KB Output is correct
42 Correct 357 ms 322636 KB Output is correct
43 Correct 888 ms 345244 KB Output is correct
44 Correct 62 ms 213844 KB Output is correct
45 Correct 64 ms 213844 KB Output is correct
46 Correct 62 ms 213840 KB Output is correct
47 Correct 79 ms 213844 KB Output is correct
48 Correct 65 ms 213892 KB Output is correct
49 Correct 65 ms 213840 KB Output is correct
50 Correct 61 ms 213840 KB Output is correct
51 Correct 67 ms 213840 KB Output is correct
52 Correct 70 ms 213860 KB Output is correct
53 Correct 64 ms 213880 KB Output is correct
54 Correct 63 ms 213840 KB Output is correct
55 Correct 63 ms 213832 KB Output is correct
56 Correct 64 ms 213840 KB Output is correct
57 Correct 73 ms 213840 KB Output is correct
58 Correct 62 ms 213840 KB Output is correct
59 Correct 66 ms 213840 KB Output is correct
60 Correct 64 ms 213840 KB Output is correct
61 Correct 62 ms 213840 KB Output is correct
62 Correct 63 ms 213760 KB Output is correct
63 Correct 63 ms 213696 KB Output is correct
64 Correct 492 ms 342936 KB Output is correct
65 Correct 489 ms 345800 KB Output is correct
66 Correct 320 ms 319868 KB Output is correct
67 Correct 310 ms 319052 KB Output is correct
68 Correct 96 ms 220996 KB Output is correct
69 Correct 90 ms 220608 KB Output is correct
70 Correct 98 ms 222152 KB Output is correct
71 Correct 108 ms 221632 KB Output is correct
72 Correct 104 ms 222464 KB Output is correct
73 Correct 98 ms 221476 KB Output is correct
74 Correct 357 ms 357276 KB Output is correct
75 Correct 364 ms 357272 KB Output is correct
76 Correct 1126 ms 349600 KB Output is correct
77 Correct 1108 ms 346524 KB Output is correct
78 Correct 669 ms 346056 KB Output is correct
79 Correct 666 ms 345428 KB Output is correct
80 Correct 453 ms 381616 KB Output is correct
81 Correct 571 ms 425116 KB Output is correct
82 Correct 562 ms 425112 KB Output is correct
83 Correct 488 ms 345244 KB Output is correct
84 Correct 451 ms 340288 KB Output is correct
85 Correct 357 ms 331516 KB Output is correct
86 Correct 355 ms 322360 KB Output is correct
87 Correct 610 ms 388908 KB Output is correct
88 Correct 553 ms 367924 KB Output is correct
89 Correct 502 ms 348356 KB Output is correct
90 Correct 336 ms 323276 KB Output is correct
91 Correct 298 ms 316872 KB Output is correct
92 Correct 370 ms 317360 KB Output is correct