답안 #960815

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
960815 2024-04-11T05:01:04 Z Trisanu_Das Hard route (IZhO17_road) C++17
100 / 100
578 ms 105056 KB
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define ff first
#define ss second
 
int n, dp[500005], cnt[500005], res = 0, way = 1;
vector<int> adj[500005];
 
void init(int u, int p){
	cnt[u] = 1;
	for (auto x : adj[u]){
		if (x == p) continue;
		init(x, u);
		if (dp[x] + 1 == dp[u]) cnt[u] += cnt[x];
		if (dp[x] + 1 > dp[u]) cnt[u] = cnt[x];
		dp[u] = max(dp[u], dp[x] + 1);
	}
}
 
bool cmp (int& i, int& j){
	return dp[i] > dp[j];
}
 
void rr(int u, int p){
	sort(adj[u].begin(), adj[u].end(), cmp);
	if (adj[u].size() >= 3){
		int cur = 0, cn = 0;
		int a = dp[adj[u][0]] + 1, b = dp[adj[u][1]] + 1, c = dp[adj[u][2]] + 1;
		cur = a * (b + c);
		int ca = 0;
		for (auto x : adj[u]){
			if (dp[x] + 1 == c) cn += ca * cnt[x];
			if (dp[x] + 1 == b) ca += cnt[x];
		}
		if (cur > res) res = cur, way = cn;
		else if (cur == res) way += cn;
	}
	pair<int, int> f = {0, 1}, s = {0, 0};
	for (auto x : adj[u]){
		if (dp[x] + 1 > f.ff) s = f, f = {dp[x] + 1, cnt[x]};
		else if (dp[x] + 1 == f.ff) f.ss += cnt[x];
		else if (dp[x] + 1 > s.ff) s = {dp[x] + 1, cnt[x]};
		else if (dp[x] + 1 == s.ff) s.ss += cnt[x];
	}
	int tmpdp = dp[u], tmpcnt = cnt[u];
	for (auto x : adj[u]){
		if (x == p) continue;
		dp[u] = f.ff, cnt[u] = f.ss;
		if (dp[x] + 1 == f.ff && cnt[x] == f.ss) dp[u] = s.ff, cnt[u] = s.ss;
		else if (dp[x] + 1 == f.ff && cnt[x] != f.ss) dp[u] = f.ff, cnt[u] = f.ss - cnt[x];
		rr(x, u);
	}
	dp[u] = tmpdp, cnt[u] = tmpcnt;
}
 
signed main(){
    ios_base::sync_with_stdio(0);
    cin.tie(NULL); 
    cin >> n;
    for (int i = 1; i < n; i++){
    	int u, v;
    	cin >> u >> v;
    	adj[u].push_back(v);
    	adj[v].push_back(u);
    }
    init(1, 0);
    rr(1, 0);
    cout << res << ' ' << way;
}
# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 12888 KB Output is correct
2 Correct 3 ms 12892 KB Output is correct
3 Correct 3 ms 12892 KB Output is correct
4 Correct 3 ms 12948 KB Output is correct
5 Correct 3 ms 12952 KB Output is correct
6 Correct 3 ms 12892 KB Output is correct
7 Correct 3 ms 12892 KB Output is correct
8 Correct 3 ms 12892 KB Output is correct
9 Correct 3 ms 12956 KB Output is correct
10 Correct 3 ms 13056 KB Output is correct
11 Correct 4 ms 12892 KB Output is correct
12 Correct 3 ms 12904 KB Output is correct
13 Correct 3 ms 12892 KB Output is correct
14 Correct 3 ms 12888 KB Output is correct
15 Correct 3 ms 12888 KB Output is correct
16 Correct 3 ms 12892 KB Output is correct
17 Correct 3 ms 12892 KB Output is correct
18 Correct 3 ms 12888 KB Output is correct
19 Correct 3 ms 12892 KB Output is correct
20 Correct 3 ms 12892 KB Output is correct
21 Correct 5 ms 12948 KB Output is correct
22 Correct 4 ms 12892 KB Output is correct
23 Correct 3 ms 12892 KB Output is correct
24 Correct 3 ms 12892 KB Output is correct
# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 12888 KB Output is correct
2 Correct 3 ms 12892 KB Output is correct
3 Correct 3 ms 12892 KB Output is correct
4 Correct 3 ms 12948 KB Output is correct
5 Correct 3 ms 12952 KB Output is correct
6 Correct 3 ms 12892 KB Output is correct
7 Correct 3 ms 12892 KB Output is correct
8 Correct 3 ms 12892 KB Output is correct
9 Correct 3 ms 12956 KB Output is correct
10 Correct 3 ms 13056 KB Output is correct
11 Correct 4 ms 12892 KB Output is correct
12 Correct 3 ms 12904 KB Output is correct
13 Correct 3 ms 12892 KB Output is correct
14 Correct 3 ms 12888 KB Output is correct
15 Correct 3 ms 12888 KB Output is correct
16 Correct 3 ms 12892 KB Output is correct
17 Correct 3 ms 12892 KB Output is correct
18 Correct 3 ms 12888 KB Output is correct
19 Correct 3 ms 12892 KB Output is correct
20 Correct 3 ms 12892 KB Output is correct
21 Correct 5 ms 12948 KB Output is correct
22 Correct 4 ms 12892 KB Output is correct
23 Correct 3 ms 12892 KB Output is correct
24 Correct 3 ms 12892 KB Output is correct
25 Correct 5 ms 13404 KB Output is correct
26 Correct 5 ms 13492 KB Output is correct
27 Correct 5 ms 13472 KB Output is correct
28 Correct 4 ms 13400 KB Output is correct
29 Correct 4 ms 13404 KB Output is correct
30 Correct 5 ms 13480 KB Output is correct
31 Correct 4 ms 13404 KB Output is correct
32 Correct 4 ms 13404 KB Output is correct
33 Correct 4 ms 13404 KB Output is correct
34 Correct 4 ms 13404 KB Output is correct
35 Correct 5 ms 13304 KB Output is correct
36 Correct 5 ms 13428 KB Output is correct
37 Correct 4 ms 13480 KB Output is correct
38 Correct 5 ms 13660 KB Output is correct
39 Correct 4 ms 13404 KB Output is correct
40 Correct 5 ms 13344 KB Output is correct
41 Correct 4 ms 13156 KB Output is correct
42 Correct 4 ms 13148 KB Output is correct
43 Correct 4 ms 13148 KB Output is correct
44 Correct 4 ms 13148 KB Output is correct
45 Correct 4 ms 13148 KB Output is correct
46 Correct 4 ms 13148 KB Output is correct
47 Correct 4 ms 13148 KB Output is correct
48 Correct 4 ms 13148 KB Output is correct
# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 12888 KB Output is correct
2 Correct 3 ms 12892 KB Output is correct
3 Correct 3 ms 12892 KB Output is correct
4 Correct 3 ms 12948 KB Output is correct
5 Correct 3 ms 12952 KB Output is correct
6 Correct 3 ms 12892 KB Output is correct
7 Correct 3 ms 12892 KB Output is correct
8 Correct 3 ms 12892 KB Output is correct
9 Correct 3 ms 12956 KB Output is correct
10 Correct 3 ms 13056 KB Output is correct
11 Correct 4 ms 12892 KB Output is correct
12 Correct 3 ms 12904 KB Output is correct
13 Correct 3 ms 12892 KB Output is correct
14 Correct 3 ms 12888 KB Output is correct
15 Correct 3 ms 12888 KB Output is correct
16 Correct 3 ms 12892 KB Output is correct
17 Correct 3 ms 12892 KB Output is correct
18 Correct 3 ms 12888 KB Output is correct
19 Correct 3 ms 12892 KB Output is correct
20 Correct 3 ms 12892 KB Output is correct
21 Correct 5 ms 12948 KB Output is correct
22 Correct 4 ms 12892 KB Output is correct
23 Correct 3 ms 12892 KB Output is correct
24 Correct 3 ms 12892 KB Output is correct
25 Correct 5 ms 13404 KB Output is correct
26 Correct 5 ms 13492 KB Output is correct
27 Correct 5 ms 13472 KB Output is correct
28 Correct 4 ms 13400 KB Output is correct
29 Correct 4 ms 13404 KB Output is correct
30 Correct 5 ms 13480 KB Output is correct
31 Correct 4 ms 13404 KB Output is correct
32 Correct 4 ms 13404 KB Output is correct
33 Correct 4 ms 13404 KB Output is correct
34 Correct 4 ms 13404 KB Output is correct
35 Correct 5 ms 13304 KB Output is correct
36 Correct 5 ms 13428 KB Output is correct
37 Correct 4 ms 13480 KB Output is correct
38 Correct 5 ms 13660 KB Output is correct
39 Correct 4 ms 13404 KB Output is correct
40 Correct 5 ms 13344 KB Output is correct
41 Correct 4 ms 13156 KB Output is correct
42 Correct 4 ms 13148 KB Output is correct
43 Correct 4 ms 13148 KB Output is correct
44 Correct 4 ms 13148 KB Output is correct
45 Correct 4 ms 13148 KB Output is correct
46 Correct 4 ms 13148 KB Output is correct
47 Correct 4 ms 13148 KB Output is correct
48 Correct 4 ms 13148 KB Output is correct
49 Correct 356 ms 67500 KB Output is correct
50 Correct 313 ms 71764 KB Output is correct
51 Correct 358 ms 75380 KB Output is correct
52 Correct 356 ms 62292 KB Output is correct
53 Correct 260 ms 71936 KB Output is correct
54 Correct 315 ms 76156 KB Output is correct
55 Correct 288 ms 66124 KB Output is correct
56 Correct 317 ms 70680 KB Output is correct
57 Correct 320 ms 76972 KB Output is correct
58 Correct 312 ms 72028 KB Output is correct
59 Correct 281 ms 71952 KB Output is correct
60 Correct 304 ms 69456 KB Output is correct
61 Correct 578 ms 105056 KB Output is correct
62 Correct 535 ms 93692 KB Output is correct
63 Correct 482 ms 60500 KB Output is correct
64 Correct 502 ms 52848 KB Output is correct
65 Correct 458 ms 48052 KB Output is correct
66 Correct 469 ms 44948 KB Output is correct
67 Correct 507 ms 43720 KB Output is correct
68 Correct 495 ms 43004 KB Output is correct
69 Correct 515 ms 42976 KB Output is correct
70 Correct 456 ms 42660 KB Output is correct
71 Correct 527 ms 42700 KB Output is correct
72 Correct 493 ms 42792 KB Output is correct
73 Correct 533 ms 42860 KB Output is correct
74 Correct 519 ms 42780 KB Output is correct
75 Correct 461 ms 42956 KB Output is correct
76 Correct 476 ms 43276 KB Output is correct
77 Correct 356 ms 44348 KB Output is correct
78 Correct 226 ms 46760 KB Output is correct