답안 #937793

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
937793	2024-03-04T13:16:10 Z	weakweakweak	Cat Exercise (JOI23_ho_t4)	C++14	100 / 100	203 ms	46864 KB

Main

#include <bits/stdc++.h>
using namespace std;

int n, val[210000], fa[210000], vtoi[210000], par[210000][21], dep[210000] = {0};
long long ans[210000] = {0};
vector <int> e[210000];

int find (int x) {return fa[x] == x ? x : fa[x] = find(fa[x]);}

void dfs(int i, int p) {
    dep[i] = dep[p] + 1;
    par[i][0] = p;
    for (int j : e[i]) if (j != p) dfs(j, i);
}

int dis (int x, int y) {
    int res = 0;
    if (dep[x] > dep[y]) swap(x, y);
    for (int i = 0; i <= 19; i++) if ((dep[y] - dep[x]) & (1 << i)) y = par[y][i], res += (1 << i);
    if (x == y) return res;
    for (int j = 19; j >= 0; j--) if (par[x][j] != par[y][j]) x = par[x][j], y = par[y][j], res += (1 << j) << 1;
    res += 2;
return res;}


int main () {
    //輸入、建圖
    ios_base::sync_with_stdio(false); cin.tie(0);
    cin >> n;
    for (int i = 1; i <= n; i++) {
        cin >> val[i];
        vtoi[val[i]] = i, fa[i] = i;
    }
    for (int i = 1; i < n; i++) {
        int x, y;
        cin >> x >> y;
        e[x].push_back(y);
        e[y].push_back(x);
    }

    //初始化lca 
    dfs(1, 1);
    for (int j = 1; j <= 19; j++) for (int i = 1; i <= n; i++) par[i][j] = par[par[i][j - 1]][j - 1];

    //做事(反著作回來，原本的操作是拔值最大的點，然後選一個子樹進去做一樣的事。現在反著做就變加點了)
    for (int ii = 1; ii <= n; ii++) {
        int i = vtoi[ii];
        for (int j : e[i]) {
            if (val[j] > ii) continue;
            j = find(j);
            ans[i] = max(ans[i], ans[j] + dis(j, i));
            fa[j] = i;      
        }
    }

    cout << ans[vtoi[n]] << '\n';
return 0;}

Subtask #1
7.0 / 7.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	10844 KB	Output is correct
2	Correct	2 ms	10844 KB	Output is correct
3	Correct	2 ms	10844 KB	Output is correct
4	Correct	2 ms	10840 KB	Output is correct
5	Correct	3 ms	10844 KB	Output is correct
6	Correct	2 ms	10892 KB	Output is correct
7	Correct	3 ms	10840 KB	Output is correct
8	Correct	2 ms	10840 KB	Output is correct
9	Correct	2 ms	10844 KB	Output is correct
10	Correct	2 ms	10892 KB	Output is correct

Subtask #2
7.0 / 7.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	10844 KB	Output is correct
2	Correct	2 ms	10844 KB	Output is correct
3	Correct	2 ms	10844 KB	Output is correct
4	Correct	2 ms	10840 KB	Output is correct
5	Correct	3 ms	10844 KB	Output is correct
6	Correct	2 ms	10892 KB	Output is correct
7	Correct	3 ms	10840 KB	Output is correct
8	Correct	2 ms	10840 KB	Output is correct
9	Correct	2 ms	10844 KB	Output is correct
10	Correct	2 ms	10892 KB	Output is correct
11	Correct	2 ms	10844 KB	Output is correct
12	Correct	2 ms	10844 KB	Output is correct
13	Correct	2 ms	10844 KB	Output is correct
14	Correct	2 ms	10844 KB	Output is correct
15	Correct	2 ms	10844 KB	Output is correct
16	Correct	2 ms	10888 KB	Output is correct
17	Correct	2 ms	10844 KB	Output is correct

Subtask #3
7.0 / 7.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	10844 KB	Output is correct
2	Correct	2 ms	10844 KB	Output is correct
3	Correct	2 ms	10844 KB	Output is correct
4	Correct	2 ms	10840 KB	Output is correct
5	Correct	3 ms	10844 KB	Output is correct
6	Correct	2 ms	10892 KB	Output is correct
7	Correct	3 ms	10840 KB	Output is correct
8	Correct	2 ms	10840 KB	Output is correct
9	Correct	2 ms	10844 KB	Output is correct
10	Correct	2 ms	10892 KB	Output is correct
11	Correct	2 ms	10844 KB	Output is correct
12	Correct	2 ms	10844 KB	Output is correct
13	Correct	2 ms	10844 KB	Output is correct
14	Correct	2 ms	10844 KB	Output is correct
15	Correct	2 ms	10844 KB	Output is correct
16	Correct	2 ms	10888 KB	Output is correct
17	Correct	2 ms	10844 KB	Output is correct
18	Correct	4 ms	11608 KB	Output is correct
19	Correct	4 ms	11608 KB	Output is correct
20	Correct	4 ms	11612 KB	Output is correct
21	Correct	4 ms	11612 KB	Output is correct
22	Correct	4 ms	11612 KB	Output is correct
23	Correct	4 ms	11612 KB	Output is correct
24	Correct	4 ms	11612 KB	Output is correct

Subtask #4
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	10844 KB	Output is correct
2	Correct	2 ms	10844 KB	Output is correct
3	Correct	2 ms	10844 KB	Output is correct
4	Correct	2 ms	10840 KB	Output is correct
5	Correct	3 ms	10844 KB	Output is correct
6	Correct	2 ms	10892 KB	Output is correct
7	Correct	3 ms	10840 KB	Output is correct
8	Correct	2 ms	10840 KB	Output is correct
9	Correct	2 ms	10844 KB	Output is correct
10	Correct	2 ms	10892 KB	Output is correct
11	Correct	2 ms	10844 KB	Output is correct
12	Correct	2 ms	10844 KB	Output is correct
13	Correct	2 ms	10844 KB	Output is correct
14	Correct	2 ms	10844 KB	Output is correct
15	Correct	2 ms	10844 KB	Output is correct
16	Correct	2 ms	10888 KB	Output is correct
17	Correct	2 ms	10844 KB	Output is correct
18	Correct	4 ms	11608 KB	Output is correct
19	Correct	4 ms	11608 KB	Output is correct
20	Correct	4 ms	11612 KB	Output is correct
21	Correct	4 ms	11612 KB	Output is correct
22	Correct	4 ms	11612 KB	Output is correct
23	Correct	4 ms	11612 KB	Output is correct
24	Correct	4 ms	11612 KB	Output is correct
25	Correct	2 ms	10844 KB	Output is correct
26	Correct	4 ms	11696 KB	Output is correct
27	Correct	4 ms	11612 KB	Output is correct
28	Correct	4 ms	11676 KB	Output is correct
29	Correct	4 ms	11612 KB	Output is correct
30	Correct	4 ms	11356 KB	Output is correct
31	Correct	4 ms	11356 KB	Output is correct
32	Correct	4 ms	11356 KB	Output is correct
33	Correct	5 ms	11608 KB	Output is correct

Subtask #5
20.0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	10844 KB	Output is correct
2	Correct	2 ms	10844 KB	Output is correct
3	Correct	2 ms	10844 KB	Output is correct
4	Correct	2 ms	10840 KB	Output is correct
5	Correct	3 ms	10844 KB	Output is correct
6	Correct	2 ms	10892 KB	Output is correct
7	Correct	3 ms	10840 KB	Output is correct
8	Correct	2 ms	10840 KB	Output is correct
9	Correct	2 ms	10844 KB	Output is correct
10	Correct	2 ms	10892 KB	Output is correct
11	Correct	2 ms	10844 KB	Output is correct
12	Correct	2 ms	10844 KB	Output is correct
13	Correct	2 ms	10844 KB	Output is correct
14	Correct	2 ms	10844 KB	Output is correct
15	Correct	2 ms	10844 KB	Output is correct
16	Correct	2 ms	10888 KB	Output is correct
17	Correct	2 ms	10844 KB	Output is correct
18	Correct	4 ms	11608 KB	Output is correct
19	Correct	4 ms	11608 KB	Output is correct
20	Correct	4 ms	11612 KB	Output is correct
21	Correct	4 ms	11612 KB	Output is correct
22	Correct	4 ms	11612 KB	Output is correct
23	Correct	4 ms	11612 KB	Output is correct
24	Correct	4 ms	11612 KB	Output is correct
25	Correct	101 ms	46864 KB	Output is correct
26	Correct	92 ms	46672 KB	Output is correct
27	Correct	91 ms	46680 KB	Output is correct
28	Correct	115 ms	46676 KB	Output is correct
29	Correct	123 ms	46852 KB	Output is correct
30	Correct	125 ms	46720 KB	Output is correct
31	Correct	115 ms	46672 KB	Output is correct

Subtask #6
23.0 / 23.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	10844 KB	Output is correct
2	Correct	2 ms	10844 KB	Output is correct
3	Correct	137 ms	37352 KB	Output is correct
4	Correct	131 ms	37332 KB	Output is correct
5	Correct	130 ms	37352 KB	Output is correct

Subtask #7
26.0 / 26.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	10844 KB	Output is correct
2	Correct	2 ms	10844 KB	Output is correct
3	Correct	2 ms	10844 KB	Output is correct
4	Correct	2 ms	10840 KB	Output is correct
5	Correct	3 ms	10844 KB	Output is correct
6	Correct	2 ms	10892 KB	Output is correct
7	Correct	3 ms	10840 KB	Output is correct
8	Correct	2 ms	10840 KB	Output is correct
9	Correct	2 ms	10844 KB	Output is correct
10	Correct	2 ms	10892 KB	Output is correct
11	Correct	2 ms	10844 KB	Output is correct
12	Correct	2 ms	10844 KB	Output is correct
13	Correct	2 ms	10844 KB	Output is correct
14	Correct	2 ms	10844 KB	Output is correct
15	Correct	2 ms	10844 KB	Output is correct
16	Correct	2 ms	10888 KB	Output is correct
17	Correct	2 ms	10844 KB	Output is correct
18	Correct	4 ms	11608 KB	Output is correct
19	Correct	4 ms	11608 KB	Output is correct
20	Correct	4 ms	11612 KB	Output is correct
21	Correct	4 ms	11612 KB	Output is correct
22	Correct	4 ms	11612 KB	Output is correct
23	Correct	4 ms	11612 KB	Output is correct
24	Correct	4 ms	11612 KB	Output is correct
25	Correct	2 ms	10844 KB	Output is correct
26	Correct	4 ms	11696 KB	Output is correct
27	Correct	4 ms	11612 KB	Output is correct
28	Correct	4 ms	11676 KB	Output is correct
29	Correct	4 ms	11612 KB	Output is correct
30	Correct	4 ms	11356 KB	Output is correct
31	Correct	4 ms	11356 KB	Output is correct
32	Correct	4 ms	11356 KB	Output is correct
33	Correct	5 ms	11608 KB	Output is correct
34	Correct	101 ms	46864 KB	Output is correct
35	Correct	92 ms	46672 KB	Output is correct
36	Correct	91 ms	46680 KB	Output is correct
37	Correct	115 ms	46676 KB	Output is correct
38	Correct	123 ms	46852 KB	Output is correct
39	Correct	125 ms	46720 KB	Output is correct
40	Correct	115 ms	46672 KB	Output is correct
41	Correct	2 ms	10844 KB	Output is correct
42	Correct	2 ms	10844 KB	Output is correct
43	Correct	137 ms	37352 KB	Output is correct
44	Correct	131 ms	37332 KB	Output is correct
45	Correct	130 ms	37352 KB	Output is correct
46	Correct	176 ms	42480 KB	Output is correct
47	Correct	203 ms	41812 KB	Output is correct
48	Correct	172 ms	42892 KB	Output is correct
49	Correct	186 ms	41808 KB	Output is correct
50	Correct	164 ms	37460 KB	Output is correct
51	Correct	165 ms	37528 KB	Output is correct
52	Correct	169 ms	37456 KB	Output is correct
53	Correct	184 ms	37828 KB	Output is correct

답안 #937793

Compilation message

Subtask #1 7.0 / 7.0

Subtask #2 7.0 / 7.0

Subtask #3 7.0 / 7.0

Subtask #4 10.0 / 10.0

Subtask #5 20.0 / 20.0

Subtask #6 23.0 / 23.0

Subtask #7 26.0 / 26.0

Subtask #1
7.0 / 7.0

Subtask #2
7.0 / 7.0

Subtask #3
7.0 / 7.0

Subtask #4
10.0 / 10.0

Subtask #5
20.0 / 20.0

Subtask #6
23.0 / 23.0

Subtask #7
26.0 / 26.0