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Submission #525561

# Submission time Handle Problem Language Result Execution time Memory
525561 2022-02-12T00:49:48 Z mjhmjh1104 Mountains and Valleys (CCO20_day1problem3) C++17
5 / 25
 739 ms 108524 KB 
#include <cstdio>
#include <vector>
#include <utility>
#include <algorithm>
using namespace std;

int n, m, dp[20][20971520];
vector<int> tree[200006];
vector<pair<int, int>> adj[200006];

int f(int x, int y) {
    if (dp[x][y] + 1) return dp[x][y];
    if (!y) return dp[x][y] = 0;
    dp[x][y] = (int)1e9;
    for (auto &i: adj[x]) dp[x][y] = min(dp[x][y], i.second + f(i.first, y & ~(1 << i.first)));
    for (auto &i: tree[x]) dp[x][y] = min(dp[x][y], 1 + f(i, y & ~(1 << i)));
    return dp[x][y];
}

int lt[5006][5006], dist[200006];

void dfs(int x, int y, int dist = 0, int prev = -1) {
    lt[y][x] = dist;
    for (auto &i: tree[x]) if (i != prev) dfs(i, y, dist + 1, x);
}

int dfs_dist(int x, int prev = -1) {
    int ret = x;
    for (auto &i: tree[x]) if (i != prev) {
        dist[i] = 1 + dist[x];
        int t = dfs_dist(i, x);
        if (dist[t] > dist[ret]) ret = t;
    }
    return ret;
}

int main() {
    scanf("%d%d", &n, &m);
    while (m--) {
        int x, y, w;
        scanf("%d%d%d", &x, &y, &w);
        if (w == 1) {
            tree[x].push_back(y);
            tree[y].push_back(x);
        } else {
            adj[x].push_back({ y, w });
            adj[y].push_back({ x, w });
        }
    }
    if (n <= 20) {
        for (int i = 0; i < n; i++) for (int j = 0; j < 1 << n; j++) dp[i][j] = -1;
        int res = (int)1e9;
        for (int i = 0; i < n; i++) res = min(res, f(i, (1 << n) - 1 ^ 1 << i));
        printf("%d", res);
        return 0;
    }
    for (int i = 0; i < n; i++) dfs(i, i);
    int t = dfs_dist(dist[0] = 0);
    dist[t] = 0;
    int zero = 2 * (n - 1) - dist[dfs_dist(t)], one = (int)1e9, two = (int)1e9, three = (int)1e9;
    for (int i = 0; i < n; i++) for (auto &j: adj[i]) if (i < j.first) one = min(one, j.second + 2 * (n - 1) - lt[i][j.first]);
    printf("%d", min({ zero, one, two, three }));
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:53:66: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
   53 |         for (int i = 0; i < n; i++) res = min(res, f(i, (1 << n) - 1 ^ 1 << i));
      |                                                         ~~~~~~~~~^~~
Main.cpp:38:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   38 |     scanf("%d%d", &n, &m);
      |     ~~~~~^~~~~~~~~~~~~~~~
Main.cpp:41:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   41 |         scanf("%d%d%d", &x, &y, &w);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~

Subtask #1
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9676 KB Output is correct
2 Correct 6 ms 9676 KB Output is correct
3 Correct 5 ms 9676 KB Output is correct
4 Correct 6 ms 9804 KB Output is correct
5 Correct 5 ms 9676 KB Output is correct
6 Correct 5 ms 9676 KB Output is correct
7 Correct 5 ms 9720 KB Output is correct
8 Correct 5 ms 9676 KB Output is correct
9 Correct 5 ms 9688 KB Output is correct
10 Correct 5 ms 9676 KB Output is correct
11 Correct 5 ms 9724 KB Output is correct
12 Correct 6 ms 9676 KB Output is correct
13 Correct 5 ms 9704 KB Output is correct
14 Correct 5 ms 9676 KB Output is correct
15 Correct 5 ms 9676 KB Output is correct

Subtask #2
2.0 / 2.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9676 KB Output is correct
2 Correct 6 ms 9676 KB Output is correct
3 Correct 5 ms 9676 KB Output is correct
4 Correct 6 ms 9804 KB Output is correct
5 Correct 5 ms 9676 KB Output is correct
6 Correct 5 ms 9676 KB Output is correct
7 Correct 5 ms 9720 KB Output is correct
8 Correct 5 ms 9676 KB Output is correct
9 Correct 5 ms 9688 KB Output is correct
10 Correct 5 ms 9676 KB Output is correct
11 Correct 5 ms 9724 KB Output is correct
12 Correct 6 ms 9676 KB Output is correct
13 Correct 5 ms 9704 KB Output is correct
14 Correct 5 ms 9676 KB Output is correct
15 Correct 5 ms 9676 KB Output is correct
16 Correct 5 ms 9676 KB Output is correct
17 Correct 5 ms 9676 KB Output is correct
18 Correct 5 ms 9676 KB Output is correct
19 Correct 5 ms 9932 KB Output is correct
20 Correct 6 ms 11724 KB Output is correct
21 Correct 6 ms 11724 KB Output is correct
22 Correct 178 ms 91908 KB Output is correct
23 Correct 45 ms 48824 KB Output is correct
24 Correct 41 ms 48808 KB Output is correct
25 Correct 33 ms 28256 KB Output is correct
26 Correct 59 ms 28296 KB Output is correct
27 Correct 275 ms 91912 KB Output is correct
28 Correct 22 ms 28236 KB Output is correct
29 Correct 31 ms 28248 KB Output is correct
30 Correct 23 ms 28264 KB Output is correct
31 Correct 27 ms 28264 KB Output is correct
32 Correct 10 ms 11724 KB Output is correct
33 Correct 5 ms 9676 KB Output is correct
34 Correct 14 ms 28220 KB Output is correct
35 Correct 15 ms 28236 KB Output is correct

Subtask #3
2.0 / 2.0

# Verdict Execution time Memory Grader output
1 Correct 720 ms 108356 KB Output is correct
2 Correct 687 ms 108408 KB Output is correct
3 Correct 689 ms 108320 KB Output is correct
4 Correct 671 ms 108244 KB Output is correct
5 Correct 674 ms 108116 KB Output is correct
6 Correct 247 ms 108100 KB Output is correct
7 Correct 697 ms 108524 KB Output is correct
8 Correct 739 ms 108232 KB Output is correct
9 Correct 678 ms 108376 KB Output is correct
10 Correct 657 ms 108240 KB Output is correct
11 Correct 685 ms 108364 KB Output is correct
12 Correct 666 ms 107972 KB Output is correct
13 Correct 675 ms 108400 KB Output is correct
14 Correct 670 ms 108228 KB Output is correct

Subtask #4
0.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9676 KB Output is correct
2 Correct 6 ms 9676 KB Output is correct
3 Correct 5 ms 9676 KB Output is correct
4 Correct 6 ms 9804 KB Output is correct
5 Correct 5 ms 9676 KB Output is correct
6 Correct 5 ms 9676 KB Output is correct
7 Correct 5 ms 9720 KB Output is correct
8 Correct 5 ms 9676 KB Output is correct
9 Correct 5 ms 9688 KB Output is correct
10 Correct 5 ms 9676 KB Output is correct
11 Correct 5 ms 9724 KB Output is correct
12 Correct 6 ms 9676 KB Output is correct
13 Correct 5 ms 9704 KB Output is correct
14 Correct 5 ms 9676 KB Output is correct
15 Correct 5 ms 9676 KB Output is correct
16 Correct 5 ms 9676 KB Output is correct
17 Correct 5 ms 9676 KB Output is correct
18 Correct 5 ms 9676 KB Output is correct
19 Correct 5 ms 9932 KB Output is correct
20 Correct 6 ms 11724 KB Output is correct
21 Correct 6 ms 11724 KB Output is correct
22 Correct 178 ms 91908 KB Output is correct
23 Correct 45 ms 48824 KB Output is correct
24 Correct 41 ms 48808 KB Output is correct
25 Correct 33 ms 28256 KB Output is correct
26 Correct 59 ms 28296 KB Output is correct
27 Correct 275 ms 91912 KB Output is correct
28 Correct 22 ms 28236 KB Output is correct
29 Correct 31 ms 28248 KB Output is correct
30 Correct 23 ms 28264 KB Output is correct
31 Correct 27 ms 28264 KB Output is correct
32 Correct 10 ms 11724 KB Output is correct
33 Correct 5 ms 9676 KB Output is correct
34 Correct 14 ms 28220 KB Output is correct
35 Correct 15 ms 28236 KB Output is correct
36 Correct 5 ms 10060 KB Output is correct
37 Correct 6 ms 10076 KB Output is correct
38 Correct 6 ms 10060 KB Output is correct
39 Incorrect 6 ms 10060 KB Output isn't correct
40 Halted 0 ms 0 KB -

Subtask #5
0.0 / 2.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9676 KB Output is correct
2 Correct 6 ms 9676 KB Output is correct
3 Correct 5 ms 9676 KB Output is correct
4 Correct 6 ms 9804 KB Output is correct
5 Correct 5 ms 9676 KB Output is correct
6 Correct 5 ms 9676 KB Output is correct
7 Correct 5 ms 9720 KB Output is correct
8 Correct 5 ms 9676 KB Output is correct
9 Correct 5 ms 9688 KB Output is correct
10 Correct 5 ms 9676 KB Output is correct
11 Correct 5 ms 9724 KB Output is correct
12 Correct 6 ms 9676 KB Output is correct
13 Correct 5 ms 9704 KB Output is correct
14 Correct 5 ms 9676 KB Output is correct
15 Correct 5 ms 9676 KB Output is correct
16 Correct 5 ms 9676 KB Output is correct
17 Correct 5 ms 9676 KB Output is correct
18 Correct 5 ms 9676 KB Output is correct
19 Correct 5 ms 9932 KB Output is correct
20 Correct 6 ms 11724 KB Output is correct
21 Correct 6 ms 11724 KB Output is correct
22 Correct 178 ms 91908 KB Output is correct
23 Correct 45 ms 48824 KB Output is correct
24 Correct 41 ms 48808 KB Output is correct
25 Correct 33 ms 28256 KB Output is correct
26 Correct 59 ms 28296 KB Output is correct
27 Correct 275 ms 91912 KB Output is correct
28 Correct 22 ms 28236 KB Output is correct
29 Correct 31 ms 28248 KB Output is correct
30 Correct 23 ms 28264 KB Output is correct
31 Correct 27 ms 28264 KB Output is correct
32 Correct 10 ms 11724 KB Output is correct
33 Correct 5 ms 9676 KB Output is correct
34 Correct 14 ms 28220 KB Output is correct
35 Correct 15 ms 28236 KB Output is correct
36 Correct 5 ms 10060 KB Output is correct
37 Correct 6 ms 10076 KB Output is correct
38 Correct 6 ms 10060 KB Output is correct
39 Incorrect 6 ms 10060 KB Output isn't correct
40 Halted 0 ms 0 KB -

Subtask #6
0.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9676 KB Output is correct
2 Correct 6 ms 9676 KB Output is correct
3 Correct 5 ms 9676 KB Output is correct
4 Correct 6 ms 9804 KB Output is correct
5 Correct 5 ms 9676 KB Output is correct
6 Correct 5 ms 9676 KB Output is correct
7 Correct 5 ms 9720 KB Output is correct
8 Correct 5 ms 9676 KB Output is correct
9 Correct 5 ms 9688 KB Output is correct
10 Correct 5 ms 9676 KB Output is correct
11 Correct 5 ms 9724 KB Output is correct
12 Correct 6 ms 9676 KB Output is correct
13 Correct 5 ms 9704 KB Output is correct
14 Correct 5 ms 9676 KB Output is correct
15 Correct 5 ms 9676 KB Output is correct
16 Correct 5 ms 9676 KB Output is correct
17 Correct 5 ms 9676 KB Output is correct
18 Correct 5 ms 9676 KB Output is correct
19 Correct 5 ms 9932 KB Output is correct
20 Correct 6 ms 11724 KB Output is correct
21 Correct 6 ms 11724 KB Output is correct
22 Correct 178 ms 91908 KB Output is correct
23 Correct 45 ms 48824 KB Output is correct
24 Correct 41 ms 48808 KB Output is correct
25 Correct 33 ms 28256 KB Output is correct
26 Correct 59 ms 28296 KB Output is correct
27 Correct 275 ms 91912 KB Output is correct
28 Correct 22 ms 28236 KB Output is correct
29 Correct 31 ms 28248 KB Output is correct
30 Correct 23 ms 28264 KB Output is correct
31 Correct 27 ms 28264 KB Output is correct
32 Correct 10 ms 11724 KB Output is correct
33 Correct 5 ms 9676 KB Output is correct
34 Correct 14 ms 28220 KB Output is correct
35 Correct 15 ms 28236 KB Output is correct
36 Correct 720 ms 108356 KB Output is correct
37 Correct 687 ms 108408 KB Output is correct
38 Correct 689 ms 108320 KB Output is correct
39 Correct 671 ms 108244 KB Output is correct
40 Correct 674 ms 108116 KB Output is correct
41 Correct 247 ms 108100 KB Output is correct
42 Correct 697 ms 108524 KB Output is correct
43 Correct 739 ms 108232 KB Output is correct
44 Correct 678 ms 108376 KB Output is correct
45 Correct 657 ms 108240 KB Output is correct
46 Correct 685 ms 108364 KB Output is correct
47 Correct 666 ms 107972 KB Output is correct
48 Correct 675 ms 108400 KB Output is correct
49 Correct 670 ms 108228 KB Output is correct
50 Correct 5 ms 10060 KB Output is correct
51 Correct 6 ms 10076 KB Output is correct
52 Correct 6 ms 10060 KB Output is correct
53 Incorrect 6 ms 10060 KB Output isn't correct
54 Halted 0 ms 0 KB -

Subtask #7
0.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9676 KB Output is correct
2 Correct 6 ms 9676 KB Output is correct
3 Correct 5 ms 9676 KB Output is correct
4 Correct 6 ms 9804 KB Output is correct
5 Correct 5 ms 9676 KB Output is correct
6 Correct 5 ms 9676 KB Output is correct
7 Correct 5 ms 9720 KB Output is correct
8 Correct 5 ms 9676 KB Output is correct
9 Correct 5 ms 9688 KB Output is correct
10 Correct 5 ms 9676 KB Output is correct
11 Correct 5 ms 9724 KB Output is correct
12 Correct 6 ms 9676 KB Output is correct
13 Correct 5 ms 9704 KB Output is correct
14 Correct 5 ms 9676 KB Output is correct
15 Correct 5 ms 9676 KB Output is correct
16 Correct 5 ms 9676 KB Output is correct
17 Correct 5 ms 9676 KB Output is correct
18 Correct 5 ms 9676 KB Output is correct
19 Correct 5 ms 9932 KB Output is correct
20 Correct 6 ms 11724 KB Output is correct
21 Correct 6 ms 11724 KB Output is correct
22 Correct 178 ms 91908 KB Output is correct
23 Correct 45 ms 48824 KB Output is correct
24 Correct 41 ms 48808 KB Output is correct
25 Correct 33 ms 28256 KB Output is correct
26 Correct 59 ms 28296 KB Output is correct
27 Correct 275 ms 91912 KB Output is correct
28 Correct 22 ms 28236 KB Output is correct
29 Correct 31 ms 28248 KB Output is correct
30 Correct 23 ms 28264 KB Output is correct
31 Correct 27 ms 28264 KB Output is correct
32 Correct 10 ms 11724 KB Output is correct
33 Correct 5 ms 9676 KB Output is correct
34 Correct 14 ms 28220 KB Output is correct
35 Correct 15 ms 28236 KB Output is correct
36 Correct 720 ms 108356 KB Output is correct
37 Correct 687 ms 108408 KB Output is correct
38 Correct 689 ms 108320 KB Output is correct
39 Correct 671 ms 108244 KB Output is correct
40 Correct 674 ms 108116 KB Output is correct
41 Correct 247 ms 108100 KB Output is correct
42 Correct 697 ms 108524 KB Output is correct
43 Correct 739 ms 108232 KB Output is correct
44 Correct 678 ms 108376 KB Output is correct
45 Correct 657 ms 108240 KB Output is correct
46 Correct 685 ms 108364 KB Output is correct
47 Correct 666 ms 107972 KB Output is correct
48 Correct 675 ms 108400 KB Output is correct
49 Correct 670 ms 108228 KB Output is correct
50 Correct 5 ms 10060 KB Output is correct
51 Correct 6 ms 10076 KB Output is correct
52 Correct 6 ms 10060 KB Output is correct
53 Incorrect 6 ms 10060 KB Output isn't correct
54 Halted 0 ms 0 KB -

Subtask #8
0.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9676 KB Output is correct
2 Correct 6 ms 9676 KB Output is correct
3 Correct 5 ms 9676 KB Output is correct
4 Correct 6 ms 9804 KB Output is correct
5 Correct 5 ms 9676 KB Output is correct
6 Correct 5 ms 9676 KB Output is correct
7 Correct 5 ms 9720 KB Output is correct
8 Correct 5 ms 9676 KB Output is correct
9 Correct 5 ms 9688 KB Output is correct
10 Correct 5 ms 9676 KB Output is correct
11 Correct 5 ms 9724 KB Output is correct
12 Correct 6 ms 9676 KB Output is correct
13 Correct 5 ms 9704 KB Output is correct
14 Correct 5 ms 9676 KB Output is correct
15 Correct 5 ms 9676 KB Output is correct
16 Correct 5 ms 9676 KB Output is correct
17 Correct 5 ms 9676 KB Output is correct
18 Correct 5 ms 9676 KB Output is correct
19 Correct 5 ms 9932 KB Output is correct
20 Correct 6 ms 11724 KB Output is correct
21 Correct 6 ms 11724 KB Output is correct
22 Correct 178 ms 91908 KB Output is correct
23 Correct 45 ms 48824 KB Output is correct
24 Correct 41 ms 48808 KB Output is correct
25 Correct 33 ms 28256 KB Output is correct
26 Correct 59 ms 28296 KB Output is correct
27 Correct 275 ms 91912 KB Output is correct
28 Correct 22 ms 28236 KB Output is correct
29 Correct 31 ms 28248 KB Output is correct
30 Correct 23 ms 28264 KB Output is correct
31 Correct 27 ms 28264 KB Output is correct
32 Correct 10 ms 11724 KB Output is correct
33 Correct 5 ms 9676 KB Output is correct
34 Correct 14 ms 28220 KB Output is correct
35 Correct 15 ms 28236 KB Output is correct
36 Correct 720 ms 108356 KB Output is correct
37 Correct 687 ms 108408 KB Output is correct
38 Correct 689 ms 108320 KB Output is correct
39 Correct 671 ms 108244 KB Output is correct
40 Correct 674 ms 108116 KB Output is correct
41 Correct 247 ms 108100 KB Output is correct
42 Correct 697 ms 108524 KB Output is correct
43 Correct 739 ms 108232 KB Output is correct
44 Correct 678 ms 108376 KB Output is correct
45 Correct 657 ms 108240 KB Output is correct
46 Correct 685 ms 108364 KB Output is correct
47 Correct 666 ms 107972 KB Output is correct
48 Correct 675 ms 108400 KB Output is correct
49 Correct 670 ms 108228 KB Output is correct
50 Correct 5 ms 10060 KB Output is correct
51 Correct 6 ms 10076 KB Output is correct
52 Correct 6 ms 10060 KB Output is correct
53 Incorrect 6 ms 10060 KB Output isn't correct
54 Halted 0 ms 0 KB -