oj.uz

답안 #92540

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
92540 2019-01-03T11:25:27 Z Just_Solve_The_Problem Hard route (IZhO17_road) C++11
52 / 100
 1120 ms 88900 KB 
#include <bits/stdc++.h>
 
using namespace std;

#define ll long long

const int N = (int)5e5 + 7;

int n;

pair < int, int > refresh(pair < int, int > A, pair < int, int > B) {
	if (A.first < B.first) {
		return B;
	} else if (A.first > B.first) {
		return A;
	} else {
		return {A.first, A.second + B.second};
	}
}

struct T {
	pair < int, int > tree[4 * N];
	T() {
	}
	void upd(int pos, int val, int v = 1, int l = 1, int r = n) {
		if (l == r) {
			tree[v] = {val, 1};
			return ;
		}
		int mid = (l + r) >> 1;
		if (pos <= mid) {
			upd(pos, val, v + v, l, mid);
		} else {
			upd(pos, val, v + v + 1, mid + 1, r);
		}
		tree[v] = refresh(tree[v + v], tree[v + v + 1]);
	}
	
	pair < int, int > getmax(int l, int r, int v = 1, int tl = 1, int tr = n) {
		if (tl > r || tr < l) return {0, 0};
		if (l <= tl && tr <= r) return tree[v];
		int mid = (tl + tr) >> 1;
		return refresh(getmax(l, r, v + v, tl, mid), getmax(l, r, v + v + 1, mid + 1, tr));
	}
};
T tr;

vector < int > gr[N];
int tin[N], tout[N], tiktak;
int h[N];
pair < ll, ll > ans, ans1;
pair < int, int > asd;

void dfs(int v, int pr) {
	tin[v] = ++tiktak;
	tr.upd(tin[v], h[v]);
	for (int to : gr[v]) {
		if (to == pr) continue;
		h[to] = h[v] + 1;
		dfs(to, v);
	}
	tout[v] = tiktak;
}

void dfs1(int v, int pr, pair < int, int > mxx, pair < int, int > asd) {
	pair < int, int > fir, sec;
	for (int to : gr[v]) {
		if (to == pr) continue;
		pair < int, int > res = mxx;
		pair < int, int > asd1 = asd;
		fir = tr.getmax(tin[to], tout[to]);
		sec = refresh(tr.getmax(tin[v] + 1, tin[to] - 1), tr.getmax(tout[to] + 1, tout[v]));
		sec.first -= h[v];
		fir.first -= h[v];
		if (mxx.first > 0) {
			if (sec.first > 0) {
				if ((fir.first + sec.first) * 1LL * mxx.first > ans.first) {
					ans.first = (fir.first + sec.first) * 1LL * mxx.first;
					ans.second = fir.second * 1LL * sec.second;
				} else if ((fir.first + sec.first) * 1LL * mxx.first == ans.first) {
					ans.second += fir.second * 1LL * sec.second;
				}
				if ((fir.first + mxx.first) * 1LL * sec.first > ans1.first) {
					ans1.first = (fir.first + mxx.first) * 1LL * sec.first;
					ans1.second = fir.second * 1LL * mxx.second;
					asd1.first = h[v] + fir.first;
					asd1.second = mxx.second;
				} else if ((fir.first + mxx.first) * 1LL * sec.first == ans1.first) {
					if (fir.first + h[v] == asd1.first) {
						ans1.second += fir.second * 1LL * (mxx.second - asd1.second);
					} else {
						ans1.second += fir.second * 1LL * mxx.second;
						asd1.first = fir.first + h[v];
					}
					asd1.second = mxx.second;
				}
			}
		}
		if (res.first < sec.first) {
			asd1 = {-1, 0};
		}
		res = refresh(res, sec);
		res.first++;
		dfs1(to, v, res, asd1);
	}
}

main() {
	//freopen("road.in", "r", stdin);
	//freopen("road.out", "w", stdout);
	scanf("%d", &n);
	for (int i = 1; i < n; i++) {
		int u, v;
		scanf("%d %d", &u, &v);
		gr[u].push_back(v);
		gr[v].push_back(u);
	}
	ans = ans1 = {0, 1};
	dfs(1, 1);
	dfs1(1, 1, {0, 1}, {-1, 0});
	ans.second /= 2;
	ans = refresh(ans, ans1);
	cout << ans.first << ' ' << ans.second;
}
/*
8
1 2
2 3
3 4
2 5
5 6
6 8
5 7
*/

Compilation message

road.cpp:108:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main() {
      ^
road.cpp: In function 'int main()':
road.cpp:111:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &n);
  ~~~~~^~~~~~~~~~
road.cpp:114:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d %d", &u, &v);
   ~~~~~^~~~~~~~~~~~~~~~~

Subtask #1
19.0 / 19.0

# 결과 실행 시간 메모리 Grader output
1 Correct 20 ms 27772 KB Output is correct
2 Correct 21 ms 27768 KB Output is correct
3 Correct 21 ms 27768 KB Output is correct
4 Correct 20 ms 27768 KB Output is correct
5 Correct 21 ms 27768 KB Output is correct
6 Correct 21 ms 27768 KB Output is correct
7 Correct 21 ms 27768 KB Output is correct
8 Correct 20 ms 27768 KB Output is correct
9 Correct 20 ms 27768 KB Output is correct
10 Correct 20 ms 27768 KB Output is correct
11 Correct 20 ms 27768 KB Output is correct
12 Correct 21 ms 27768 KB Output is correct
13 Correct 24 ms 27768 KB Output is correct
14 Correct 24 ms 27816 KB Output is correct
15 Correct 21 ms 27768 KB Output is correct
16 Correct 23 ms 27764 KB Output is correct
17 Correct 23 ms 27768 KB Output is correct
18 Correct 24 ms 27768 KB Output is correct
19 Correct 21 ms 27768 KB Output is correct
20 Correct 23 ms 27768 KB Output is correct
21 Correct 21 ms 27768 KB Output is correct
22 Correct 21 ms 27772 KB Output is correct
23 Correct 22 ms 27768 KB Output is correct
24 Correct 24 ms 27740 KB Output is correct

Subtask #2
33.0 / 33.0

# 결과 실행 시간 메모리 Grader output
1 Correct 20 ms 27772 KB Output is correct
2 Correct 21 ms 27768 KB Output is correct
3 Correct 21 ms 27768 KB Output is correct
4 Correct 20 ms 27768 KB Output is correct
5 Correct 21 ms 27768 KB Output is correct
6 Correct 21 ms 27768 KB Output is correct
7 Correct 21 ms 27768 KB Output is correct
8 Correct 20 ms 27768 KB Output is correct
9 Correct 20 ms 27768 KB Output is correct
10 Correct 20 ms 27768 KB Output is correct
11 Correct 20 ms 27768 KB Output is correct
12 Correct 21 ms 27768 KB Output is correct
13 Correct 24 ms 27768 KB Output is correct
14 Correct 24 ms 27816 KB Output is correct
15 Correct 21 ms 27768 KB Output is correct
16 Correct 23 ms 27764 KB Output is correct
17 Correct 23 ms 27768 KB Output is correct
18 Correct 24 ms 27768 KB Output is correct
19 Correct 21 ms 27768 KB Output is correct
20 Correct 23 ms 27768 KB Output is correct
21 Correct 21 ms 27768 KB Output is correct
22 Correct 21 ms 27772 KB Output is correct
23 Correct 22 ms 27768 KB Output is correct
24 Correct 24 ms 27740 KB Output is correct
25 Correct 27 ms 28152 KB Output is correct
26 Correct 27 ms 28280 KB Output is correct
27 Correct 28 ms 28372 KB Output is correct
28 Correct 28 ms 28280 KB Output is correct
29 Correct 27 ms 28280 KB Output is correct
30 Correct 27 ms 28280 KB Output is correct
31 Correct 28 ms 28280 KB Output is correct
32 Correct 28 ms 28152 KB Output is correct
33 Correct 28 ms 28280 KB Output is correct
34 Correct 25 ms 28408 KB Output is correct
35 Correct 24 ms 28280 KB Output is correct
36 Correct 27 ms 28280 KB Output is correct
37 Correct 25 ms 28356 KB Output is correct
38 Correct 26 ms 28792 KB Output is correct
39 Correct 28 ms 28252 KB Output is correct
40 Correct 28 ms 28024 KB Output is correct
41 Correct 27 ms 28016 KB Output is correct
42 Correct 25 ms 27896 KB Output is correct
43 Correct 25 ms 27900 KB Output is correct
44 Correct 24 ms 28024 KB Output is correct
45 Correct 24 ms 28024 KB Output is correct
46 Correct 23 ms 27896 KB Output is correct
47 Correct 24 ms 28024 KB Output is correct
48 Correct 24 ms 27896 KB Output is correct

Subtask #3
0 / 48.0

# 결과 실행 시간 메모리 Grader output
1 Correct 20 ms 27772 KB Output is correct
2 Correct 21 ms 27768 KB Output is correct
3 Correct 21 ms 27768 KB Output is correct
4 Correct 20 ms 27768 KB Output is correct
5 Correct 21 ms 27768 KB Output is correct
6 Correct 21 ms 27768 KB Output is correct
7 Correct 21 ms 27768 KB Output is correct
8 Correct 20 ms 27768 KB Output is correct
9 Correct 20 ms 27768 KB Output is correct
10 Correct 20 ms 27768 KB Output is correct
11 Correct 20 ms 27768 KB Output is correct
12 Correct 21 ms 27768 KB Output is correct
13 Correct 24 ms 27768 KB Output is correct
14 Correct 24 ms 27816 KB Output is correct
15 Correct 21 ms 27768 KB Output is correct
16 Correct 23 ms 27764 KB Output is correct
17 Correct 23 ms 27768 KB Output is correct
18 Correct 24 ms 27768 KB Output is correct
19 Correct 21 ms 27768 KB Output is correct
20 Correct 23 ms 27768 KB Output is correct
21 Correct 21 ms 27768 KB Output is correct
22 Correct 21 ms 27772 KB Output is correct
23 Correct 22 ms 27768 KB Output is correct
24 Correct 24 ms 27740 KB Output is correct
25 Correct 27 ms 28152 KB Output is correct
26 Correct 27 ms 28280 KB Output is correct
27 Correct 28 ms 28372 KB Output is correct
28 Correct 28 ms 28280 KB Output is correct
29 Correct 27 ms 28280 KB Output is correct
30 Correct 27 ms 28280 KB Output is correct
31 Correct 28 ms 28280 KB Output is correct
32 Correct 28 ms 28152 KB Output is correct
33 Correct 28 ms 28280 KB Output is correct
34 Correct 25 ms 28408 KB Output is correct
35 Correct 24 ms 28280 KB Output is correct
36 Correct 27 ms 28280 KB Output is correct
37 Correct 25 ms 28356 KB Output is correct
38 Correct 26 ms 28792 KB Output is correct
39 Correct 28 ms 28252 KB Output is correct
40 Correct 28 ms 28024 KB Output is correct
41 Correct 27 ms 28016 KB Output is correct
42 Correct 25 ms 27896 KB Output is correct
43 Correct 25 ms 27900 KB Output is correct
44 Correct 24 ms 28024 KB Output is correct
45 Correct 24 ms 28024 KB Output is correct
46 Correct 23 ms 27896 KB Output is correct
47 Correct 24 ms 28024 KB Output is correct
48 Correct 24 ms 27896 KB Output is correct
49 Correct 1038 ms 78736 KB Output is correct
50 Correct 1066 ms 83960 KB Output is correct
51 Correct 1120 ms 88900 KB Output is correct
52 Correct 1093 ms 72152 KB Output is correct
53 Incorrect 975 ms 81184 KB Output isn't correct
54 Halted 0 ms 0 KB -