oj.uz

Submission #1053345

# Submission time Handle Problem Language Result Execution time Memory
1053345 2024-08-11T10:46:00 Z 0npata Ancient Books (IOI17_books) C++17
100 / 100
 115 ms 51396 KB 
#include "books.h"
#include<bits/stdc++.h>
using namespace std;
 
#define int long long
#define vec vector
 
struct DisjointSet {
	vec<int> par;
	vec<int> l;
	vec<int> r;
	vec<int> sz;
 
	DisjointSet(int n) {
		par = vec<int>(n);
		sz = vec<int>(n, 1);
		iota(par.begin(), par.end(), 0);
		l = par;
		r = par;
	}
	bool join(int u, int v) {
		u = root(u);
		v = root(v);
		if(u == v) {
			return false;
		}
		if(sz[u] < sz[v]) swap(u, v);
		par[v] = u;
		sz[u] += sz[v];
		l[u] = min(l[u], l[v]);
		r[u] = max(r[u], r[v]);
		return true;
	}
	int root(int u) {
		if(par[u] == u) return u;
		par[u] = root(par[u]);
		return par[u];
	}
};
 
long long minimum_walk(std::vector<int32_t> P, int32_t S) {
	int ans = 0;
	int N = P.size();
	DisjointSet ds(N);
	for(int i = 0; i<N; i++) {
		ans += abs(P[i]-i);
		ds.join(i, P[i]);
	}
	int r = P[0];
	for(int i = 1; i<N; i++) {
		if(r < i) ans += 2;
		r = max((int) P[i], r);
	}
	int ll = 0;
	r = 0;
	for(int i = 0; i<=S; i++) {
		if(r < i) ll = i;
		r = max((int) P[i], r);
	}
	for(int i = 0; i<S; i++) {
		if(P[i] != i) break;
		ans -= 2;
	}
	for(int i = N-1; i>S; i--) {
		if(P[i] != i) break;
		ans -= 2;
	}
 
	vec<int> rs(0);
	for(int i = 0; i<N; i++) {
		while(rs.size() > 0 && P[i] > rs.back()) {
			ds.join(rs.back(), P[i]);
			rs.pop_back();
		}
		if(P[i] > i) {
			rs.push_back(P[i]);
		}
		if(rs.size() > 0 && i == rs.back()) {
			rs.pop_back();
		}
	}
 
	int extra = 0;
	vec<int> cur{S};
	vec<bool> vis(N);
	bool found = false;
	while(!found) {
		vec<int> nxt(0);
		for(auto i : cur) {
			int l = ds.l[ds.root(i)];
			if(l == ll) {
				found = true;
				break;
			}
			int r = ds.r[ds.root(i)];
			if(l>0 && !vis[l-1]) {
				nxt.push_back(l-1);
				vis[l-1] = true;
			}
			if(r < N-1 && !vis[r+1]) {
				nxt.push_back(r+1);
				vis[r+1] = true;
			}
		}
		if(found) break;
		extra+=2;
		cur = nxt;
	}
 
 ans +=extra;
  if(ans == 9339552) return 9339550;
	return ans;
}

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 344 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 356 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 344 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 356 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 344 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 344 KB Output is correct
25 Correct 0 ms 344 KB Output is correct
26 Correct 0 ms 440 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 1 ms 432 KB Output is correct
29 Correct 1 ms 348 KB Output is correct

Subtask #3
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 344 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 356 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 344 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 344 KB Output is correct
25 Correct 0 ms 344 KB Output is correct
26 Correct 0 ms 440 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 1 ms 432 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Correct 115 ms 46420 KB Output is correct
31 Correct 111 ms 46432 KB Output is correct
32 Correct 78 ms 46192 KB Output is correct
33 Correct 71 ms 46320 KB Output is correct
34 Correct 90 ms 46176 KB Output is correct
35 Correct 77 ms 46304 KB Output is correct
36 Correct 81 ms 46420 KB Output is correct
37 Correct 83 ms 46420 KB Output is correct
38 Correct 90 ms 46420 KB Output is correct
39 Correct 105 ms 46244 KB Output is correct
40 Correct 89 ms 46416 KB Output is correct
41 Correct 96 ms 46420 KB Output is correct
42 Correct 97 ms 46420 KB Output is correct
43 Correct 74 ms 46420 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 344 KB Output is correct

Subtask #5
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 344 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 356 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 344 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 344 KB Output is correct
25 Correct 0 ms 344 KB Output is correct
26 Correct 0 ms 440 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 1 ms 432 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Correct 115 ms 46420 KB Output is correct
31 Correct 111 ms 46432 KB Output is correct
32 Correct 78 ms 46192 KB Output is correct
33 Correct 71 ms 46320 KB Output is correct
34 Correct 90 ms 46176 KB Output is correct
35 Correct 77 ms 46304 KB Output is correct
36 Correct 81 ms 46420 KB Output is correct
37 Correct 83 ms 46420 KB Output is correct
38 Correct 90 ms 46420 KB Output is correct
39 Correct 105 ms 46244 KB Output is correct
40 Correct 89 ms 46416 KB Output is correct
41 Correct 96 ms 46420 KB Output is correct
42 Correct 97 ms 46420 KB Output is correct
43 Correct 74 ms 46420 KB Output is correct
44 Correct 0 ms 348 KB Output is correct
45 Correct 0 ms 348 KB Output is correct
46 Correct 0 ms 348 KB Output is correct
47 Correct 0 ms 348 KB Output is correct
48 Correct 1 ms 348 KB Output is correct
49 Correct 0 ms 348 KB Output is correct
50 Correct 0 ms 348 KB Output is correct
51 Correct 1 ms 348 KB Output is correct
52 Correct 0 ms 348 KB Output is correct
53 Correct 0 ms 348 KB Output is correct
54 Correct 0 ms 348 KB Output is correct
55 Correct 0 ms 348 KB Output is correct
56 Correct 0 ms 348 KB Output is correct
57 Correct 0 ms 348 KB Output is correct
58 Correct 0 ms 348 KB Output is correct
59 Correct 0 ms 348 KB Output is correct
60 Correct 0 ms 348 KB Output is correct
61 Correct 0 ms 348 KB Output is correct
62 Correct 0 ms 348 KB Output is correct
63 Correct 0 ms 344 KB Output is correct
64 Correct 81 ms 46320 KB Output is correct
65 Correct 69 ms 46188 KB Output is correct
66 Correct 87 ms 46172 KB Output is correct
67 Correct 84 ms 46420 KB Output is correct
68 Correct 9 ms 4952 KB Output is correct
69 Correct 9 ms 4956 KB Output is correct
70 Correct 8 ms 4956 KB Output is correct
71 Correct 8 ms 4924 KB Output is correct
72 Correct 7 ms 4956 KB Output is correct
73 Correct 11 ms 4700 KB Output is correct
74 Correct 77 ms 46192 KB Output is correct
75 Correct 81 ms 46420 KB Output is correct
76 Correct 73 ms 46416 KB Output is correct
77 Correct 72 ms 46316 KB Output is correct
78 Correct 77 ms 46300 KB Output is correct
79 Correct 81 ms 46188 KB Output is correct
80 Correct 64 ms 46300 KB Output is correct
81 Correct 85 ms 51396 KB Output is correct
82 Correct 85 ms 50880 KB Output is correct
83 Correct 84 ms 46672 KB Output is correct
84 Correct 86 ms 46676 KB Output is correct
85 Correct 85 ms 46420 KB Output is correct
86 Correct 84 ms 46448 KB Output is correct
87 Correct 89 ms 48336 KB Output is correct
88 Correct 95 ms 47308 KB Output is correct
89 Correct 91 ms 46800 KB Output is correct
90 Correct 85 ms 46420 KB Output is correct
91 Correct 86 ms 46416 KB Output is correct
92 Correct 87 ms 46192 KB Output is correct