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Submission #292682

# Submission time Handle Problem Language Result Execution time Memory
292682 2020-09-07T11:43:47 Z 임성재(#5807) ROI16_sending (ROI16_sending) C++17
48 / 100
 5000 ms 9336 KB 
#include<bits/stdc++.h>
using namespace std;

#define fast ios::sync_with_stdio(false); cin.tie(0);
#define fi first
#define se second
#define em emplace 
#define eb emplace_back
#define mp make_pair
#define all(v) (v).begin(), (v).end()

typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
const int inf = 1e9;
const ll INF = 1e18;

int n, k;
int sp[200010][21];
int d[200010];
int a[200010];
int b[200010];

int lca(int a, int b) {
	if(d[a] > d[b]) swap(a, b);

	for(int i=20; i>=0; i--) {
		if(d[b] - d[a] >= (1<<i)) b = sp[b][i];
	}


	if(a == b) return a;

	for(int i=20; i>=0; i--) {
		if(sp[a][i] != sp[b][i]) {
			a = sp[a][i], b = sp[b][i];
		}
	}

	return sp[a][0];
}

int dist(int a, int b) {
	return d[a] + d[b] - 2 * d[lca(a, b)];
}

int main() {
	fast;

	cin >> n >> k;

	for(int i=2; i<=n; i++) {
		cin >> sp[i][0];
		d[i] = d[sp[i][0]] + 1;
	}

	for(int j=1; j<=20; j++) {
		for(int i=1; i<=n; i++) {
			sp[i][j] = sp[sp[i][j-1]][j-1];
		}
	}

	for(int i=1; i<=k; i++) {
		cin >> a[i] >> b[i];
	}

	int ans = 0;
	pii mxi = mp(1, 2);

	for(int i=1; i<=k; i++) {
		for(int j = i+1; j<=k; j++) {
			int x = dist(a[i], b[i]) + dist(a[j], b[j]);
			x -= min(dist(a[i], a[j]) + dist(b[i], b[j]), dist(a[i], b[j]) + dist(a[j], b[i]));
			
			if(x > ans) {
				ans = x;
				mxi = mp(i, j);
			}
		}
	}

	cout << ans / 2 << "\n";
	cout << mxi.fi << " " << mxi.se;
}

Subtask #1
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 0 ms 384 KB Output is correct
6 Correct 3 ms 384 KB Output is correct
7 Correct 4 ms 384 KB Output is correct
8 Correct 2 ms 384 KB Output is correct
9 Correct 3 ms 384 KB Output is correct
10 Correct 3 ms 384 KB Output is correct
11 Correct 2 ms 384 KB Output is correct
12 Correct 2 ms 384 KB Output is correct
13 Correct 3 ms 384 KB Output is correct
14 Correct 4 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 1 ms 384 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 3 ms 384 KB Output is correct
19 Correct 3 ms 384 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 0 ms 384 KB Output is correct
6 Correct 3 ms 384 KB Output is correct
7 Correct 4 ms 384 KB Output is correct
8 Correct 2 ms 384 KB Output is correct
9 Correct 3 ms 384 KB Output is correct
10 Correct 3 ms 384 KB Output is correct
11 Correct 2 ms 384 KB Output is correct
12 Correct 2 ms 384 KB Output is correct
13 Correct 3 ms 384 KB Output is correct
14 Correct 4 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 1 ms 384 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 3 ms 384 KB Output is correct
19 Correct 3 ms 384 KB Output is correct
20 Correct 278 ms 760 KB Output is correct
21 Correct 299 ms 760 KB Output is correct
22 Correct 320 ms 760 KB Output is correct
23 Correct 423 ms 764 KB Output is correct
24 Correct 352 ms 760 KB Output is correct
25 Correct 194 ms 760 KB Output is correct
26 Correct 310 ms 640 KB Output is correct
27 Correct 250 ms 760 KB Output is correct
28 Correct 249 ms 888 KB Output is correct
29 Correct 93 ms 760 KB Output is correct
30 Correct 59 ms 640 KB Output is correct
31 Correct 49 ms 640 KB Output is correct
32 Correct 306 ms 888 KB Output is correct
33 Correct 343 ms 760 KB Output is correct

Subtask #3
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 0 ms 384 KB Output is correct
6 Correct 3 ms 384 KB Output is correct
7 Correct 4 ms 384 KB Output is correct
8 Correct 2 ms 384 KB Output is correct
9 Correct 3 ms 384 KB Output is correct
10 Correct 3 ms 384 KB Output is correct
11 Correct 2 ms 384 KB Output is correct
12 Correct 2 ms 384 KB Output is correct
13 Correct 3 ms 384 KB Output is correct
14 Correct 4 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 1 ms 384 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 3 ms 384 KB Output is correct
19 Correct 3 ms 384 KB Output is correct
20 Correct 278 ms 760 KB Output is correct
21 Correct 299 ms 760 KB Output is correct
22 Correct 320 ms 760 KB Output is correct
23 Correct 423 ms 764 KB Output is correct
24 Correct 352 ms 760 KB Output is correct
25 Correct 194 ms 760 KB Output is correct
26 Correct 310 ms 640 KB Output is correct
27 Correct 250 ms 760 KB Output is correct
28 Correct 249 ms 888 KB Output is correct
29 Correct 93 ms 760 KB Output is correct
30 Correct 59 ms 640 KB Output is correct
31 Correct 49 ms 640 KB Output is correct
32 Correct 306 ms 888 KB Output is correct
33 Correct 343 ms 760 KB Output is correct
34 Correct 363 ms 8960 KB Output is correct
35 Correct 426 ms 8960 KB Output is correct
36 Correct 745 ms 8960 KB Output is correct
37 Correct 920 ms 9024 KB Output is correct
38 Correct 787 ms 9028 KB Output is correct
39 Correct 234 ms 9028 KB Output is correct
40 Correct 765 ms 8960 KB Output is correct
41 Correct 273 ms 9024 KB Output is correct
42 Correct 329 ms 8960 KB Output is correct
43 Correct 148 ms 9080 KB Output is correct
44 Correct 142 ms 8960 KB Output is correct
45 Correct 76 ms 8960 KB Output is correct
46 Correct 724 ms 9220 KB Output is correct
47 Correct 662 ms 9156 KB Output is correct

Subtask #4
0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 0 ms 384 KB Output is correct
6 Correct 3 ms 384 KB Output is correct
7 Correct 4 ms 384 KB Output is correct
8 Correct 2 ms 384 KB Output is correct
9 Correct 3 ms 384 KB Output is correct
10 Correct 3 ms 384 KB Output is correct
11 Correct 2 ms 384 KB Output is correct
12 Correct 2 ms 384 KB Output is correct
13 Correct 3 ms 384 KB Output is correct
14 Correct 4 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 1 ms 384 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 3 ms 384 KB Output is correct
19 Correct 3 ms 384 KB Output is correct
20 Correct 278 ms 760 KB Output is correct
21 Correct 299 ms 760 KB Output is correct
22 Correct 320 ms 760 KB Output is correct
23 Correct 423 ms 764 KB Output is correct
24 Correct 352 ms 760 KB Output is correct
25 Correct 194 ms 760 KB Output is correct
26 Correct 310 ms 640 KB Output is correct
27 Correct 250 ms 760 KB Output is correct
28 Correct 249 ms 888 KB Output is correct
29 Correct 93 ms 760 KB Output is correct
30 Correct 59 ms 640 KB Output is correct
31 Correct 49 ms 640 KB Output is correct
32 Correct 306 ms 888 KB Output is correct
33 Correct 343 ms 760 KB Output is correct
34 Correct 363 ms 8960 KB Output is correct
35 Correct 426 ms 8960 KB Output is correct
36 Correct 745 ms 8960 KB Output is correct
37 Correct 920 ms 9024 KB Output is correct
38 Correct 787 ms 9028 KB Output is correct
39 Correct 234 ms 9028 KB Output is correct
40 Correct 765 ms 8960 KB Output is correct
41 Correct 273 ms 9024 KB Output is correct
42 Correct 329 ms 8960 KB Output is correct
43 Correct 148 ms 9080 KB Output is correct
44 Correct 142 ms 8960 KB Output is correct
45 Correct 76 ms 8960 KB Output is correct
46 Correct 724 ms 9220 KB Output is correct
47 Correct 662 ms 9156 KB Output is correct
48 Execution timed out 5057 ms 8960 KB Time limit exceeded
49 Halted 0 ms 0 KB -

Subtask #5
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 5067 ms 9336 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0 / 12.0

# Verdict Execution time Memory Grader output
1 Execution timed out 5071 ms 9336 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #7
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 0 ms 384 KB Output is correct
6 Correct 3 ms 384 KB Output is correct
7 Correct 4 ms 384 KB Output is correct
8 Correct 2 ms 384 KB Output is correct
9 Correct 3 ms 384 KB Output is correct
10 Correct 3 ms 384 KB Output is correct
11 Correct 2 ms 384 KB Output is correct
12 Correct 2 ms 384 KB Output is correct
13 Correct 3 ms 384 KB Output is correct
14 Correct 4 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 1 ms 384 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 3 ms 384 KB Output is correct
19 Correct 3 ms 384 KB Output is correct
20 Correct 278 ms 760 KB Output is correct
21 Correct 299 ms 760 KB Output is correct
22 Correct 320 ms 760 KB Output is correct
23 Correct 423 ms 764 KB Output is correct
24 Correct 352 ms 760 KB Output is correct
25 Correct 194 ms 760 KB Output is correct
26 Correct 310 ms 640 KB Output is correct
27 Correct 250 ms 760 KB Output is correct
28 Correct 249 ms 888 KB Output is correct
29 Correct 93 ms 760 KB Output is correct
30 Correct 59 ms 640 KB Output is correct
31 Correct 49 ms 640 KB Output is correct
32 Correct 306 ms 888 KB Output is correct
33 Correct 343 ms 760 KB Output is correct
34 Correct 363 ms 8960 KB Output is correct
35 Correct 426 ms 8960 KB Output is correct
36 Correct 745 ms 8960 KB Output is correct
37 Correct 920 ms 9024 KB Output is correct
38 Correct 787 ms 9028 KB Output is correct
39 Correct 234 ms 9028 KB Output is correct
40 Correct 765 ms 8960 KB Output is correct
41 Correct 273 ms 9024 KB Output is correct
42 Correct 329 ms 8960 KB Output is correct
43 Correct 148 ms 9080 KB Output is correct
44 Correct 142 ms 8960 KB Output is correct
45 Correct 76 ms 8960 KB Output is correct
46 Correct 724 ms 9220 KB Output is correct
47 Correct 662 ms 9156 KB Output is correct
48 Execution timed out 5057 ms 8960 KB Time limit exceeded
49 Halted 0 ms 0 KB -

Subtask #8
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 0 ms 384 KB Output is correct
6 Correct 3 ms 384 KB Output is correct
7 Correct 4 ms 384 KB Output is correct
8 Correct 2 ms 384 KB Output is correct
9 Correct 3 ms 384 KB Output is correct
10 Correct 3 ms 384 KB Output is correct
11 Correct 2 ms 384 KB Output is correct
12 Correct 2 ms 384 KB Output is correct
13 Correct 3 ms 384 KB Output is correct
14 Correct 4 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 1 ms 384 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 3 ms 384 KB Output is correct
19 Correct 3 ms 384 KB Output is correct
20 Correct 278 ms 760 KB Output is correct
21 Correct 299 ms 760 KB Output is correct
22 Correct 320 ms 760 KB Output is correct
23 Correct 423 ms 764 KB Output is correct
24 Correct 352 ms 760 KB Output is correct
25 Correct 194 ms 760 KB Output is correct
26 Correct 310 ms 640 KB Output is correct
27 Correct 250 ms 760 KB Output is correct
28 Correct 249 ms 888 KB Output is correct
29 Correct 93 ms 760 KB Output is correct
30 Correct 59 ms 640 KB Output is correct
31 Correct 49 ms 640 KB Output is correct
32 Correct 306 ms 888 KB Output is correct
33 Correct 343 ms 760 KB Output is correct
34 Correct 363 ms 8960 KB Output is correct
35 Correct 426 ms 8960 KB Output is correct
36 Correct 745 ms 8960 KB Output is correct
37 Correct 920 ms 9024 KB Output is correct
38 Correct 787 ms 9028 KB Output is correct
39 Correct 234 ms 9028 KB Output is correct
40 Correct 765 ms 8960 KB Output is correct
41 Correct 273 ms 9024 KB Output is correct
42 Correct 329 ms 8960 KB Output is correct
43 Correct 148 ms 9080 KB Output is correct
44 Correct 142 ms 8960 KB Output is correct
45 Correct 76 ms 8960 KB Output is correct
46 Correct 724 ms 9220 KB Output is correct
47 Correct 662 ms 9156 KB Output is correct
48 Execution timed out 5057 ms 8960 KB Time limit exceeded
49 Halted 0 ms 0 KB -