oj.uz

답안 #417366

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
417366 2021-06-03T15:36:47 Z parsabahrami Sumtree (INOI20_sumtree) C++17
50 / 100
 1415 ms 112728 KB 
#include <bits/stdc++.h>

using namespace std;

typedef long long int ll;
typedef pair<int, int> pii; 

#define SZ(x) (int) (x).size();
#define F     first
#define S     second

int Pow(int a, int b, int md, int ret = 1) {
	for (; b; b >>= 1, a = 1ll * a * a % md) 
		if (b & 1) ret = 1ll * ret * a % md;
	return ret;
}

const int N = 5e5 + 10, MOD = 1e9 + 7;
int F[N], St[N], Ft[N], I[N], hv[N], hd[N], S[N], P[N], val[N], H[N], n, q, R, timer;
vector<int> adj[N]; set<pii> st[N]; int ret;
struct node {
	int d, lz; node *lc, *rc; 

	node() : d(0), lz(0), lc(nullptr), rc(nullptr) {}

	void bld(int l = 0, int r = n) {
		if (r - l < 2) return;
		lc = new node(); rc = new node();
		int md = (l + r) >> 1;
		lc->bld(l, md), rc->bld(md, r);
	}

	void shift() { 
		if (!lz) return;
		d += lz;
		if (lc) lc->lz += lz;
		if (rc) rc->lz += lz;
		lz = 0;
	}

	void upd(int ql, int qr, int x, int l = 0, int r = n) {
		shift();
		if (qr <= l || r <= ql) return;
		if (ql <= l && r <= qr) { lz += x; return shift(); }
		int md = (l + r) >> 1;
		lc->upd(ql, qr, x, l, md), rc->upd(ql, qr, x, md, r);
		d = min(lc->d, rc->d);
	}

	int get(int p, int l = 0, int r = n) {
        shift();
		if (r - l < 2) return d;
		int md = (l + r) >> 1;
		return p < md ? lc->get(p, l, md) : rc->get(p, md, r);
	}
};
node *A, *B;

void preDFS(int v, int p = -1) {
	S[v] = 1; P[v] = p;
	for (int u : adj[v]) 
		if (u != p) { H[u] = H[v] + 1, preDFS(u, v), S[v] += S[u];
			if (S[hv[v]] < S[u]) hv[v] = u; }
}

void hldDFS(int v, int p = -1) {
	if (!~p) hd[v] = v;
	St[v] = timer++;
	if (hv[v]) 
		hd[hv[v]] = hd[v], hldDFS(hv[v], v);
	for (int u : adj[v])
		if (u != p && u != hv[v]) 
			hldDFS(hd[u] = u, v);
	Ft[v] = timer;
}

int C(int x, int y) {
	if (x < y || y < 0) return 0;
	return F[x] * 1ll * I[y] % MOD * I[x - y] % MOD;
}

int main() {
	scanf("%d%d", &n, &R);
	F[0] = 1; st[1].insert(pii(0, 1)); val[1] = R;
	for (int i = 1; i < N; i++)  
		F[i] = 1ll * F[i - 1] * i % MOD;
	I[N - 1] = Pow(F[N - 1], MOD - 2, MOD);
	for (int i = N - 1; i; i--) 
		I[i - 1] = 1ll * I[i] * i % MOD;
	for (int i = 1; i < n; i++) {
		int u, v; scanf("%d%d", &u, &v); 
		adj[u].push_back(v);
		adj[v].push_back(u);
	} 
	A = new node(), B = new node(); A->bld(), B->bld(); B->upd(0, 1, R);
	preDFS(1); hldDFS(1);
	printf("%d\n", ret = C(R + n - 1, n - 1));
	for (int i = 1; i <= n; i++) 
		A->upd(St[i], St[i] + 1, S[i]);
	for (scanf("%d", &q); q; q--) {
		int t, v, x; scanf("%d%d", &t, &v);
		if (t < 2) {
			scanf("%d", &x); int sub = A->get(St[v]); B->upd(St[v], St[v] + 1, x);
			int y = B->get(St[v]); val[v] = x;
			ret = 1ll * ret * C(y + sub - 1, sub - 1) % MOD;
			int u = P[v];
			while (st[hd[u]].empty() || st[hd[u]].begin()->F > St[u]) {
				A->upd(St[hd[u]], St[u] + 1, -sub); 
				B->upd(St[hd[u]], St[u] + 1, -y);
				u = P[hd[u]]; 
			}
			int pr = prev(st[hd[u]].lower_bound(pii(St[u], n + 1)))->S;
			st[hd[v]].insert(pii(St[v], v));
			int cpr = A->get(St[pr]); int z = B->get(St[pr]);
			ret = 1ll * ret * Pow(C(cpr - 1 + z, z), MOD - 2, MOD) % MOD;
			A->upd(St[pr], St[u] + 1, -sub); B->upd(St[pr], St[u] + 1, -y); 
			z = B->get(St[pr]); cpr = A->get(St[pr]);
			ret = 1ll * ret * C(cpr - 1 + z, z) % MOD;
		} else {
            int sub = A->get(St[v]), y = B->get(St[v]);
			ret = 1ll * ret * Pow(C(y + sub - 1, sub - 1), MOD - 2, MOD) % MOD;
			int u = P[v]; st[hd[v]].erase({St[v], v});
			while (st[hd[u]].empty() || st[hd[u]].begin()->F > St[u]) {
				A->upd(St[hd[u]], St[u] + 1, sub); 
				B->upd(St[hd[u]], St[u] + 1, y);
				u = P[hd[u]]; 
			}
			int pr = prev(st[hd[u]].lower_bound(pii(St[u], n + 1)))->S;
			int cpr = A->get(St[pr]); int z = B->get(St[pr]); 
			ret = 1ll * ret * Pow(C(cpr - 1 + z, z), MOD - 2, MOD) % MOD;
			A->upd(St[pr], St[u] + 1, sub); B->upd(St[pr], St[u] + 1, y); 
			z = B->get(St[pr]); cpr = A->get(St[pr]); 
			ret = 1ll * ret * C(cpr - 1 + z, z) % MOD; B->upd(St[v], St[v] + 1, -val[v]);
		}
		printf("%d\n", ret);
	}
	return 0;
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:83:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   83 |  scanf("%d%d", &n, &R);
      |  ~~~~~^~~~~~~~~~~~~~~~
Main.cpp:91:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   91 |   int u, v; scanf("%d%d", &u, &v);
      |             ~~~~~^~~~~~~~~~~~~~~~
Main.cpp:100:12: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  100 |  for (scanf("%d", &q); q; q--) {
      |       ~~~~~^~~~~~~~~~
Main.cpp:101:21: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  101 |   int t, v, x; scanf("%d%d", &t, &v);
      |                ~~~~~^~~~~~~~~~~~~~~~
Main.cpp:103:9: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  103 |    scanf("%d", &x); int sub = A->get(St[v]); B->upd(St[v], St[v] + 1, x);
      |    ~~~~~^~~~~~~~~~

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 316 ms 86852 KB Output is correct
2 Correct 345 ms 86916 KB Output is correct
3 Correct 307 ms 86944 KB Output is correct
4 Correct 300 ms 86972 KB Output is correct
5 Correct 277 ms 82228 KB Output is correct
6 Correct 34 ms 40236 KB Output is correct
7 Correct 54 ms 40008 KB Output is correct
8 Correct 33 ms 40080 KB Output is correct
9 Correct 357 ms 77884 KB Output is correct
10 Correct 354 ms 77632 KB Output is correct
11 Correct 378 ms 77872 KB Output is correct
12 Correct 362 ms 75808 KB Output is correct
13 Correct 254 ms 83152 KB Output is correct

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 29 ms 39452 KB Output is correct
2 Correct 29 ms 39496 KB Output is correct
3 Correct 30 ms 39356 KB Output is correct
4 Correct 35 ms 39484 KB Output is correct
5 Correct 32 ms 39564 KB Output is correct
6 Correct 39 ms 39884 KB Output is correct
7 Correct 37 ms 39884 KB Output is correct
8 Correct 38 ms 39876 KB Output is correct
9 Correct 37 ms 40068 KB Output is correct
10 Correct 36 ms 40132 KB Output is correct
11 Correct 37 ms 40204 KB Output is correct
12 Correct 33 ms 40140 KB Output is correct
13 Correct 40 ms 40080 KB Output is correct
14 Correct 46 ms 40088 KB Output is correct
15 Correct 38 ms 40316 KB Output is correct
16 Correct 38 ms 40116 KB Output is correct
17 Correct 37 ms 40104 KB Output is correct
18 Correct 35 ms 39864 KB Output is correct
19 Correct 38 ms 40104 KB Output is correct
20 Correct 39 ms 39872 KB Output is correct
21 Correct 35 ms 39868 KB Output is correct
22 Correct 32 ms 39500 KB Output is correct

Subtask #3
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 328 ms 87060 KB Output is correct
2 Correct 419 ms 89604 KB Output is correct
3 Correct 372 ms 89288 KB Output is correct
4 Correct 542 ms 91700 KB Output is correct
5 Correct 766 ms 91416 KB Output is correct
6 Correct 36 ms 40396 KB Output is correct
7 Correct 34 ms 40028 KB Output is correct
8 Correct 35 ms 40128 KB Output is correct
9 Correct 872 ms 86412 KB Output is correct
10 Correct 924 ms 84844 KB Output is correct
11 Correct 756 ms 84372 KB Output is correct
12 Correct 917 ms 85244 KB Output is correct
13 Correct 664 ms 112552 KB Output is correct
14 Correct 669 ms 112592 KB Output is correct
15 Correct 666 ms 112536 KB Output is correct
16 Correct 659 ms 112728 KB Output is correct
17 Correct 649 ms 112592 KB Output is correct

Subtask #4
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1388 ms 82764 KB Output is correct
2 Correct 1389 ms 83596 KB Output is correct
3 Correct 1415 ms 83844 KB Output is correct
4 Correct 1352 ms 83660 KB Output is correct
5 Correct 1360 ms 81560 KB Output is correct
6 Correct 1351 ms 83568 KB Output is correct
7 Correct 995 ms 63220 KB Output is correct
8 Correct 954 ms 63388 KB Output is correct
9 Correct 1351 ms 83728 KB Output is correct
10 Correct 1270 ms 83768 KB Output is correct
11 Correct 1278 ms 83876 KB Output is correct
12 Correct 961 ms 63388 KB Output is correct
13 Incorrect 691 ms 61872 KB Output isn't correct
14 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 316 ms 86852 KB Output is correct
2 Correct 345 ms 86916 KB Output is correct
3 Correct 307 ms 86944 KB Output is correct
4 Correct 300 ms 86972 KB Output is correct
5 Correct 277 ms 82228 KB Output is correct
6 Correct 34 ms 40236 KB Output is correct
7 Correct 54 ms 40008 KB Output is correct
8 Correct 33 ms 40080 KB Output is correct
9 Correct 357 ms 77884 KB Output is correct
10 Correct 354 ms 77632 KB Output is correct
11 Correct 378 ms 77872 KB Output is correct
12 Correct 362 ms 75808 KB Output is correct
13 Correct 254 ms 83152 KB Output is correct
14 Correct 29 ms 39452 KB Output is correct
15 Correct 29 ms 39496 KB Output is correct
16 Correct 30 ms 39356 KB Output is correct
17 Correct 35 ms 39484 KB Output is correct
18 Correct 32 ms 39564 KB Output is correct
19 Correct 39 ms 39884 KB Output is correct
20 Correct 37 ms 39884 KB Output is correct
21 Correct 38 ms 39876 KB Output is correct
22 Correct 37 ms 40068 KB Output is correct
23 Correct 36 ms 40132 KB Output is correct
24 Correct 37 ms 40204 KB Output is correct
25 Correct 33 ms 40140 KB Output is correct
26 Correct 40 ms 40080 KB Output is correct
27 Correct 46 ms 40088 KB Output is correct
28 Correct 38 ms 40316 KB Output is correct
29 Correct 38 ms 40116 KB Output is correct
30 Correct 37 ms 40104 KB Output is correct
31 Correct 35 ms 39864 KB Output is correct
32 Correct 38 ms 40104 KB Output is correct
33 Correct 39 ms 39872 KB Output is correct
34 Correct 35 ms 39868 KB Output is correct
35 Correct 32 ms 39500 KB Output is correct
36 Correct 328 ms 87060 KB Output is correct
37 Correct 419 ms 89604 KB Output is correct
38 Correct 372 ms 89288 KB Output is correct
39 Correct 542 ms 91700 KB Output is correct
40 Correct 766 ms 91416 KB Output is correct
41 Correct 36 ms 40396 KB Output is correct
42 Correct 34 ms 40028 KB Output is correct
43 Correct 35 ms 40128 KB Output is correct
44 Correct 872 ms 86412 KB Output is correct
45 Correct 924 ms 84844 KB Output is correct
46 Correct 756 ms 84372 KB Output is correct
47 Correct 917 ms 85244 KB Output is correct
48 Correct 664 ms 112552 KB Output is correct
49 Correct 669 ms 112592 KB Output is correct
50 Correct 666 ms 112536 KB Output is correct
51 Correct 659 ms 112728 KB Output is correct
52 Correct 649 ms 112592 KB Output is correct
53 Correct 1388 ms 82764 KB Output is correct
54 Correct 1389 ms 83596 KB Output is correct
55 Correct 1415 ms 83844 KB Output is correct
56 Correct 1352 ms 83660 KB Output is correct
57 Correct 1360 ms 81560 KB Output is correct
58 Correct 1351 ms 83568 KB Output is correct
59 Correct 995 ms 63220 KB Output is correct
60 Correct 954 ms 63388 KB Output is correct
61 Correct 1351 ms 83728 KB Output is correct
62 Correct 1270 ms 83768 KB Output is correct
63 Correct 1278 ms 83876 KB Output is correct
64 Correct 961 ms 63388 KB Output is correct
65 Incorrect 691 ms 61872 KB Output isn't correct
66 Halted 0 ms 0 KB -