oj.uz

Submission #1048713

# Submission time Handle Problem Language Result Execution time Memory
1048713 2024-08-08T09:13:10 Z Gromp15 Ancient Books (IOI17_books) C++17
70 / 100
 400 ms 1048576 KB 
#include <bits/stdc++.h>
#include "books.h"
#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
using namespace std;
template<typename T> bool ckmin(T &a, const T &b) { return a > b ? a = b, 1 : 0; }
template<typename T> bool ckmax(T &a, const T &b) { return a < b ? a = b, 1 : 0; }

template<typename op>
struct sparse_table {
	op x;
	vector<vector<int>> table;
	sparse_table(const vector<int>& a, op t) : table(__lg(sz(a)) + 1, vector<int>(sz(a))), x(t) {
		for (int i = 0; i < sz(a); i++) table[0][i] = a[i];
		for (int i = 1; i <= __lg(sz(a)); i++) {
			for (int j = 0; j < sz(a); j++) {
				if (j + (1 << i) - 1 >= sz(a)) break;
				table[i][j] = x(table[i-1][j], table[i-1][j+(1<<(i-1))]);
			}
		}
	}
	int query(int l, int r) {
		int h = __lg(r-l+1);
		return x(table[h][l], table[h][r-(1<<h)+1]);
	}
};
long long minimum_walk(std::vector<int> p, int s) {
	if (!s) {
		int n = p.size();
		vector<bool> vis(n);
		vector<long long> cost(n);
		vector<int> to(n);
		long long ans = 0;
		for (int i = 0; i < n; i++) if (i != p[i] && !vis[i]) {
			int right = i;
			int tmp = i;
			while (!vis[tmp]) {
				ckmax(right, tmp);
				ans += abs(tmp - p[tmp]), vis[tmp] = 1, tmp = p[tmp];
			}
			to[i] = right;
		}
		int on = 0;
		fill(all(vis), 0);
		for (int i = 0; i < n; i++) if (i != p[i] && !vis[i]) {
			int tmp = i;
			while (!vis[tmp]) vis[tmp] = 1, tmp = p[tmp];
			if (i <= on) ckmax(on, to[i]);
			else ans += 2 * (i - on), on = to[i];
		}
		return ans;
	}
	int n = p.size();
	vector<int> L(n), R(n);
	long long ans = 0;
	vector<bool> vis(n);
	for (int i = 0; i < n; i++) if (!vis[i]) {
		int right = i;
		int tmp = i;
		vector<int> cur;
		while (!vis[tmp]) {
			cur.emplace_back(tmp);
			ckmax(right, tmp);
			ans += abs(tmp - p[tmp]), vis[tmp] = 1, tmp = p[tmp];
		}
		for (int v : cur) L[v] = i, R[v] = right;
	}
	sparse_table mn(L, [&](int x, int y) { return min(x, y); });
	sparse_table mx(R, [&](int x, int y) { return max(x, y); });
	vector<vector<long long>> dp(n, vector<long long>(n, 1e18));
	dp[s][s] = 0;
	for (int len = 1; len < n; len++) {
		for (int l = 0; l+len-1 < n; l++) {
			int r = l+len-1;
			ckmin(dp[mn.query(l, r)][mx.query(l, r)], dp[l][r]);
			if (l) ckmin(dp[l-1][r], dp[l][r] + 2);
			if (r+1 < n) ckmin(dp[l][r+1], dp[l][r] + 2);
		}
	}
	int l = n, r = -1;
	for (int i = 0; i < n; i++) if (i != p[i]) ckmin(l, i), r = i;
	if (l == n) return 0;
	long long best = 1e18;
	for (int i = 0; i <= l; i++) for (int j = r; j < n; j++) ckmin(best, dp[i][j]);
	return best + ans;
}

Compilation message

books.cpp: In instantiation of 'sparse_table<op>::sparse_table(const std::vector<int>&, op) [with op = minimum_walk(std::vector<int>, int)::<lambda(int, int)>]':
books.cpp:68:60:   required from here
books.cpp:12:22: warning: 'sparse_table<minimum_walk(std::vector<int>, int)::<lambda(int, int)> >::table' will be initialized after [-Wreorder]
   12 |  vector<vector<int>> table;
      |                      ^~~~~
books.cpp:11:5: warning:   'minimum_walk(std::vector<int>, int)::<lambda(int, int)> sparse_table<minimum_walk(std::vector<int>, int)::<lambda(int, int)> >::x' [-Wreorder]
   11 |  op x;
      |     ^
books.cpp:13:2: warning:   when initialized here [-Wreorder]
   13 |  sparse_table(const vector<int>& a, op t) : table(__lg(sz(a)) + 1, vector<int>(sz(a))), x(t) {
      |  ^~~~~~~~~~~~
books.cpp: In instantiation of 'sparse_table<op>::sparse_table(const std::vector<int>&, op) [with op = minimum_walk(std::vector<int>, int)::<lambda(int, int)>]':
books.cpp:69:60:   required from here
books.cpp:12:22: warning: 'sparse_table<minimum_walk(std::vector<int>, int)::<lambda(int, int)> >::table' will be initialized after [-Wreorder]
   12 |  vector<vector<int>> table;
      |                      ^~~~~
books.cpp:11:5: warning:   'minimum_walk(std::vector<int>, int)::<lambda(int, int)> sparse_table<minimum_walk(std::vector<int>, int)::<lambda(int, int)> >::x' [-Wreorder]
   11 |  op x;
      |     ^
books.cpp:13:2: warning:   when initialized here [-Wreorder]
   13 |  sparse_table(const vector<int>& a, op t) : table(__lg(sz(a)) + 1, vector<int>(sz(a))), x(t) {
      |  ^~~~~~~~~~~~

Subtask #1
12.0 / 12.0

# 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 0 ms 424 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 344 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 348 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 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 0 ms 424 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 344 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 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 344 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 344 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 348 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct

Subtask #3
28.0 / 28.0

# 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 0 ms 424 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 344 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 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 344 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 344 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 348 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 86 ms 19968 KB Output is correct
31 Correct 100 ms 24892 KB Output is correct
32 Correct 59 ms 24788 KB Output is correct
33 Correct 71 ms 25048 KB Output is correct
34 Correct 67 ms 24832 KB Output is correct
35 Correct 72 ms 24976 KB Output is correct
36 Correct 67 ms 24824 KB Output is correct
37 Correct 72 ms 24960 KB Output is correct
38 Correct 74 ms 24916 KB Output is correct
39 Correct 64 ms 24736 KB Output is correct
40 Correct 87 ms 24932 KB Output is correct
41 Correct 80 ms 24788 KB Output is correct
42 Correct 78 ms 24992 KB Output is correct
43 Correct 69 ms 24992 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 8280 KB Output is correct
2 Correct 5 ms 8284 KB Output is correct
3 Correct 5 ms 8308 KB Output is correct
4 Correct 5 ms 8280 KB Output is correct
5 Correct 5 ms 8284 KB Output is correct
6 Correct 4 ms 8292 KB Output is correct
7 Correct 4 ms 8220 KB Output is correct
8 Correct 5 ms 8284 KB Output is correct
9 Correct 5 ms 8336 KB Output is correct
10 Correct 4 ms 8284 KB Output is correct
11 Correct 6 ms 8404 KB Output is correct
12 Correct 5 ms 8284 KB Output is correct
13 Correct 4 ms 8284 KB Output is correct
14 Correct 6 ms 8236 KB Output is correct
15 Correct 5 ms 8280 KB Output is correct
16 Correct 4 ms 8284 KB Output is correct
17 Correct 5 ms 8284 KB Output is correct
18 Correct 6 ms 8284 KB Output is correct
19 Correct 5 ms 8280 KB Output is correct
20 Correct 6 ms 8284 KB Output is correct

Subtask #5
0 / 30.0

# 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 0 ms 424 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 344 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 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 344 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 344 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 348 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 86 ms 19968 KB Output is correct
31 Correct 100 ms 24892 KB Output is correct
32 Correct 59 ms 24788 KB Output is correct
33 Correct 71 ms 25048 KB Output is correct
34 Correct 67 ms 24832 KB Output is correct
35 Correct 72 ms 24976 KB Output is correct
36 Correct 67 ms 24824 KB Output is correct
37 Correct 72 ms 24960 KB Output is correct
38 Correct 74 ms 24916 KB Output is correct
39 Correct 64 ms 24736 KB Output is correct
40 Correct 87 ms 24932 KB Output is correct
41 Correct 80 ms 24788 KB Output is correct
42 Correct 78 ms 24992 KB Output is correct
43 Correct 69 ms 24992 KB Output is correct
44 Correct 5 ms 8280 KB Output is correct
45 Correct 5 ms 8284 KB Output is correct
46 Correct 5 ms 8308 KB Output is correct
47 Correct 5 ms 8280 KB Output is correct
48 Correct 5 ms 8284 KB Output is correct
49 Correct 4 ms 8292 KB Output is correct
50 Correct 4 ms 8220 KB Output is correct
51 Correct 5 ms 8284 KB Output is correct
52 Correct 5 ms 8336 KB Output is correct
53 Correct 4 ms 8284 KB Output is correct
54 Correct 6 ms 8404 KB Output is correct
55 Correct 5 ms 8284 KB Output is correct
56 Correct 4 ms 8284 KB Output is correct
57 Correct 6 ms 8236 KB Output is correct
58 Correct 5 ms 8280 KB Output is correct
59 Correct 4 ms 8284 KB Output is correct
60 Correct 5 ms 8284 KB Output is correct
61 Correct 6 ms 8284 KB Output is correct
62 Correct 5 ms 8280 KB Output is correct
63 Correct 6 ms 8284 KB Output is correct
64 Runtime error 400 ms 1048576 KB Execution killed with signal 9
65 Halted 0 ms 0 KB -