답안 #623612

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
623612	2022-08-06T05:42:14 Z	Arinoor	Subtree (INOI20_subtree)	C++17	100 / 100	74 ms	21324 KB

Main

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

#define pb				push_back
#define mp				make_pair
#define fi				first
#define se				second
#define all(x)			x.begin(), x.end()
#define bug(x)			cout << #x << " : " << x << '\n'
#define ios				ios_base::sync_with_stdio(false), cin.tie(0), cout.tie(0)

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

const int maxn = 1e5 + 10;
const int mod = 1e9 + 7;
const int inf = 1e9 + 10;

int par[maxn], h[maxn], U[maxn];
int dp[maxn], val[maxn], val2[maxn], val3[maxn];
bool visited[maxn];
vector<int> G[maxn];

int add(int a, int b){
	int c = a + b;
	if(c >= mod)
		c -= mod;
	if(c < 0)
		c += mod;
	return c;
}

int mul(int a, int b){
	return 1ll * a * b % mod;
}

void dfs(int v){
	visited[v] = true;
	for(int u : G[v]){
		if(!visited[u]){
			par[u] = v;
			h[u] = h[v] + 1;
			dfs(u);
		}
		else if(h[v] < h[u]){
			U[v] = u;
		}
	}
}

void Dfs(int v){
	for(int u : G[v])
		if(par[u] == v)
			Dfs(u);
	if(!U[v]){
		dp[v] = 1;
		for(int u : G[v])
			if(par[u] == v)
				dp[v] = mul(dp[v], add(dp[u], 1));
		return;
	}
	vector<int> V;
	V.pb(0);
	int u = U[v];
	while(true){
		V.pb(u);
		if(u == v)
			break;
		u = par[u];
	}
	int m = V.size();
	val[0] = 1;
	for(int i = 1; i < m; i ++){
		val[i] = 1;
		int v = V[i];
		for(int u : G[v])
			if(par[u] == v and u != V[i - 1])
				val[i] = mul(val[i], add(dp[u], 1));
	}
	val2[0] = 1;
	for(int i = 1; i < m; i ++)
		val2[i] = mul(val2[i - 1], val[i]);
	val3[m - 1] = val[m - 1];
	for(int i = m - 2; ~i; i --)
		val3[i] = mul(val3[i + 1], val[i]);
	for(int i = m - 2; ~i; i --)
		val3[i] = add(val3[i], val3[i + 1]);
	for(int i = 0; i < m - 2; i ++)
		dp[v] = add(dp[v], mul(val2[i], val3[i + 2]));
}

int main(){
	ios;
	int n, m;
	cin >> n >> m;
	for(int i = 0; i < m; i ++){
		int u, v;
		cin >> u >> v;
		G[u].pb(v);
		G[v].pb(u);
	}
	dfs(1);
	Dfs(1);
	int ans = 0;
	for(int i = 1; i <= n; i ++){
		ans = add(ans, dp[i]);
	}
	cout << ans << '\n';
}

Subtask #1
8.0 / 8.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	2644 KB	Output is correct
2	Correct	2 ms	2684 KB	Output is correct
3	Correct	2 ms	2644 KB	Output is correct
4	Correct	1 ms	2644 KB	Output is correct
5	Correct	2 ms	2684 KB	Output is correct
6	Correct	2 ms	2644 KB	Output is correct
7	Correct	2 ms	2644 KB	Output is correct
8	Correct	2 ms	2644 KB	Output is correct
9	Correct	2 ms	2644 KB	Output is correct
10	Correct	2 ms	2644 KB	Output is correct
11	Correct	2 ms	2644 KB	Output is correct
12	Correct	2 ms	2644 KB	Output is correct
13	Correct	2 ms	2644 KB	Output is correct
14	Correct	1 ms	2684 KB	Output is correct
15	Correct	2 ms	2644 KB	Output is correct
16	Correct	1 ms	2680 KB	Output is correct
17	Correct	1 ms	2644 KB	Output is correct
18	Correct	2 ms	2644 KB	Output is correct
19	Correct	1 ms	2684 KB	Output is correct
20	Correct	2 ms	2644 KB	Output is correct
21	Correct	1 ms	2688 KB	Output is correct
22	Correct	1 ms	2644 KB	Output is correct
23	Correct	1 ms	2644 KB	Output is correct
24	Correct	2 ms	2644 KB	Output is correct
25	Correct	1 ms	2688 KB	Output is correct
26	Correct	1 ms	2644 KB	Output is correct
27	Correct	1 ms	2644 KB	Output is correct
28	Correct	1 ms	2644 KB	Output is correct
29	Correct	2 ms	2684 KB	Output is correct
30	Correct	2 ms	2684 KB	Output is correct
31	Correct	2 ms	2644 KB	Output is correct
32	Correct	1 ms	2644 KB	Output is correct
33	Correct	1 ms	2644 KB	Output is correct
34	Correct	2 ms	2644 KB	Output is correct
35	Correct	1 ms	2644 KB	Output is correct
36	Correct	2 ms	2644 KB	Output is correct
37	Correct	1 ms	2644 KB	Output is correct
38	Correct	1 ms	2644 KB	Output is correct
39	Correct	1 ms	2644 KB	Output is correct
40	Correct	2 ms	2680 KB	Output is correct
41	Correct	2 ms	2644 KB	Output is correct
42	Correct	2 ms	2644 KB	Output is correct
43	Correct	2 ms	2772 KB	Output is correct
44	Correct	2 ms	2644 KB	Output is correct
45	Correct	1 ms	2644 KB	Output is correct
46	Correct	1 ms	2644 KB	Output is correct
47	Correct	2 ms	2644 KB	Output is correct
48	Correct	2 ms	2644 KB	Output is correct
49	Correct	2 ms	2644 KB	Output is correct
50	Correct	2 ms	2644 KB	Output is correct
51	Correct	2 ms	2644 KB	Output is correct

Subtask #2
12.0 / 12.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	2688 KB	Output is correct
2	Correct	5 ms	3156 KB	Output is correct
3	Correct	44 ms	8360 KB	Output is correct
4	Correct	42 ms	8272 KB	Output is correct
5	Correct	45 ms	8328 KB	Output is correct
6	Correct	43 ms	8268 KB	Output is correct
7	Correct	57 ms	18384 KB	Output is correct
8	Correct	60 ms	14664 KB	Output is correct
9	Correct	54 ms	14584 KB	Output is correct
10	Correct	35 ms	8916 KB	Output is correct
11	Correct	34 ms	8424 KB	Output is correct
12	Correct	54 ms	8180 KB	Output is correct
13	Correct	44 ms	8224 KB	Output is correct
14	Correct	42 ms	12672 KB	Output is correct
15	Correct	60 ms	19888 KB	Output is correct
16	Correct	61 ms	21324 KB	Output is correct
17	Correct	43 ms	8276 KB	Output is correct
18	Correct	42 ms	8252 KB	Output is correct
19	Correct	46 ms	8324 KB	Output is correct
20	Correct	32 ms	8516 KB	Output is correct
21	Correct	32 ms	8684 KB	Output is correct
22	Correct	33 ms	8644 KB	Output is correct

Subtask #3
30.0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	2644 KB	Output is correct
2	Correct	2 ms	2684 KB	Output is correct
3	Correct	2 ms	2644 KB	Output is correct
4	Correct	1 ms	2644 KB	Output is correct
5	Correct	2 ms	2684 KB	Output is correct
6	Correct	2 ms	2644 KB	Output is correct
7	Correct	2 ms	2644 KB	Output is correct
8	Correct	2 ms	2644 KB	Output is correct
9	Correct	2 ms	2644 KB	Output is correct
10	Correct	2 ms	2644 KB	Output is correct
11	Correct	2 ms	2644 KB	Output is correct
12	Correct	2 ms	2644 KB	Output is correct
13	Correct	2 ms	2644 KB	Output is correct
14	Correct	1 ms	2684 KB	Output is correct
15	Correct	2 ms	2644 KB	Output is correct
16	Correct	1 ms	2680 KB	Output is correct
17	Correct	1 ms	2644 KB	Output is correct
18	Correct	2 ms	2644 KB	Output is correct
19	Correct	1 ms	2684 KB	Output is correct
20	Correct	2 ms	2644 KB	Output is correct
21	Correct	1 ms	2688 KB	Output is correct
22	Correct	1 ms	2644 KB	Output is correct
23	Correct	1 ms	2644 KB	Output is correct
24	Correct	2 ms	2644 KB	Output is correct
25	Correct	1 ms	2688 KB	Output is correct
26	Correct	1 ms	2644 KB	Output is correct
27	Correct	1 ms	2644 KB	Output is correct
28	Correct	1 ms	2644 KB	Output is correct
29	Correct	2 ms	2684 KB	Output is correct
30	Correct	2 ms	2684 KB	Output is correct
31	Correct	2 ms	2644 KB	Output is correct
32	Correct	1 ms	2644 KB	Output is correct
33	Correct	1 ms	2644 KB	Output is correct
34	Correct	2 ms	2644 KB	Output is correct
35	Correct	1 ms	2644 KB	Output is correct
36	Correct	2 ms	2644 KB	Output is correct
37	Correct	1 ms	2644 KB	Output is correct
38	Correct	1 ms	2644 KB	Output is correct
39	Correct	1 ms	2644 KB	Output is correct
40	Correct	2 ms	2680 KB	Output is correct
41	Correct	2 ms	2644 KB	Output is correct
42	Correct	2 ms	2644 KB	Output is correct
43	Correct	2 ms	2772 KB	Output is correct
44	Correct	2 ms	2644 KB	Output is correct
45	Correct	1 ms	2644 KB	Output is correct
46	Correct	1 ms	2644 KB	Output is correct
47	Correct	2 ms	2644 KB	Output is correct
48	Correct	2 ms	2644 KB	Output is correct
49	Correct	2 ms	2644 KB	Output is correct
50	Correct	2 ms	2644 KB	Output is correct
51	Correct	2 ms	2644 KB	Output is correct
52	Correct	3 ms	2900 KB	Output is correct
53	Correct	4 ms	2900 KB	Output is correct
54	Correct	4 ms	2900 KB	Output is correct
55	Correct	3 ms	3028 KB	Output is correct
56	Correct	4 ms	3468 KB	Output is correct
57	Correct	3 ms	2900 KB	Output is correct
58	Correct	3 ms	2900 KB	Output is correct
59	Correct	3 ms	3156 KB	Output is correct
60	Correct	3 ms	2900 KB	Output is correct
61	Correct	3 ms	2900 KB	Output is correct
62	Correct	4 ms	3028 KB	Output is correct
63	Correct	3 ms	2900 KB	Output is correct
64	Correct	3 ms	2900 KB	Output is correct
65	Correct	3 ms	2952 KB	Output is correct
66	Correct	4 ms	2952 KB	Output is correct
67	Correct	3 ms	3028 KB	Output is correct
68	Correct	4 ms	3412 KB	Output is correct
69	Correct	3 ms	2900 KB	Output is correct
70	Correct	3 ms	2900 KB	Output is correct
71	Correct	3 ms	2900 KB	Output is correct
72	Correct	4 ms	2920 KB	Output is correct
73	Correct	3 ms	2952 KB	Output is correct
74	Correct	4 ms	2948 KB	Output is correct
75	Correct	4 ms	3216 KB	Output is correct
76	Correct	3 ms	3028 KB	Output is correct
77	Correct	4 ms	3464 KB	Output is correct
78	Correct	3 ms	3012 KB	Output is correct
79	Correct	4 ms	3336 KB	Output is correct
80	Correct	4 ms	2952 KB	Output is correct
81	Correct	3 ms	3028 KB	Output is correct
82	Correct	3 ms	2956 KB	Output is correct
83	Correct	3 ms	3008 KB	Output is correct

Subtask #4
50.0 / 50.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	2644 KB	Output is correct
2	Correct	2 ms	2684 KB	Output is correct
3	Correct	2 ms	2644 KB	Output is correct
4	Correct	1 ms	2644 KB	Output is correct
5	Correct	2 ms	2684 KB	Output is correct
6	Correct	2 ms	2644 KB	Output is correct
7	Correct	2 ms	2644 KB	Output is correct
8	Correct	2 ms	2644 KB	Output is correct
9	Correct	2 ms	2644 KB	Output is correct
10	Correct	2 ms	2644 KB	Output is correct
11	Correct	2 ms	2644 KB	Output is correct
12	Correct	2 ms	2644 KB	Output is correct
13	Correct	2 ms	2644 KB	Output is correct
14	Correct	1 ms	2684 KB	Output is correct
15	Correct	2 ms	2644 KB	Output is correct
16	Correct	1 ms	2680 KB	Output is correct
17	Correct	1 ms	2644 KB	Output is correct
18	Correct	2 ms	2644 KB	Output is correct
19	Correct	1 ms	2684 KB	Output is correct
20	Correct	2 ms	2644 KB	Output is correct
21	Correct	1 ms	2688 KB	Output is correct
22	Correct	1 ms	2644 KB	Output is correct
23	Correct	1 ms	2644 KB	Output is correct
24	Correct	2 ms	2644 KB	Output is correct
25	Correct	1 ms	2688 KB	Output is correct
26	Correct	1 ms	2644 KB	Output is correct
27	Correct	1 ms	2644 KB	Output is correct
28	Correct	1 ms	2644 KB	Output is correct
29	Correct	2 ms	2684 KB	Output is correct
30	Correct	2 ms	2684 KB	Output is correct
31	Correct	2 ms	2644 KB	Output is correct
32	Correct	1 ms	2644 KB	Output is correct
33	Correct	1 ms	2644 KB	Output is correct
34	Correct	2 ms	2644 KB	Output is correct
35	Correct	1 ms	2644 KB	Output is correct
36	Correct	2 ms	2644 KB	Output is correct
37	Correct	1 ms	2644 KB	Output is correct
38	Correct	1 ms	2644 KB	Output is correct
39	Correct	1 ms	2644 KB	Output is correct
40	Correct	2 ms	2680 KB	Output is correct
41	Correct	2 ms	2644 KB	Output is correct
42	Correct	2 ms	2644 KB	Output is correct
43	Correct	2 ms	2772 KB	Output is correct
44	Correct	2 ms	2644 KB	Output is correct
45	Correct	1 ms	2644 KB	Output is correct
46	Correct	1 ms	2644 KB	Output is correct
47	Correct	2 ms	2644 KB	Output is correct
48	Correct	2 ms	2644 KB	Output is correct
49	Correct	2 ms	2644 KB	Output is correct
50	Correct	2 ms	2644 KB	Output is correct
51	Correct	2 ms	2644 KB	Output is correct
52	Correct	2 ms	2688 KB	Output is correct
53	Correct	5 ms	3156 KB	Output is correct
54	Correct	44 ms	8360 KB	Output is correct
55	Correct	42 ms	8272 KB	Output is correct
56	Correct	45 ms	8328 KB	Output is correct
57	Correct	43 ms	8268 KB	Output is correct
58	Correct	57 ms	18384 KB	Output is correct
59	Correct	60 ms	14664 KB	Output is correct
60	Correct	54 ms	14584 KB	Output is correct
61	Correct	35 ms	8916 KB	Output is correct
62	Correct	34 ms	8424 KB	Output is correct
63	Correct	54 ms	8180 KB	Output is correct
64	Correct	44 ms	8224 KB	Output is correct
65	Correct	42 ms	12672 KB	Output is correct
66	Correct	60 ms	19888 KB	Output is correct
67	Correct	61 ms	21324 KB	Output is correct
68	Correct	43 ms	8276 KB	Output is correct
69	Correct	42 ms	8252 KB	Output is correct
70	Correct	46 ms	8324 KB	Output is correct
71	Correct	32 ms	8516 KB	Output is correct
72	Correct	32 ms	8684 KB	Output is correct
73	Correct	33 ms	8644 KB	Output is correct
74	Correct	3 ms	2900 KB	Output is correct
75	Correct	4 ms	2900 KB	Output is correct
76	Correct	4 ms	2900 KB	Output is correct
77	Correct	3 ms	3028 KB	Output is correct
78	Correct	4 ms	3468 KB	Output is correct
79	Correct	3 ms	2900 KB	Output is correct
80	Correct	3 ms	2900 KB	Output is correct
81	Correct	3 ms	3156 KB	Output is correct
82	Correct	3 ms	2900 KB	Output is correct
83	Correct	3 ms	2900 KB	Output is correct
84	Correct	4 ms	3028 KB	Output is correct
85	Correct	3 ms	2900 KB	Output is correct
86	Correct	3 ms	2900 KB	Output is correct
87	Correct	3 ms	2952 KB	Output is correct
88	Correct	4 ms	2952 KB	Output is correct
89	Correct	3 ms	3028 KB	Output is correct
90	Correct	4 ms	3412 KB	Output is correct
91	Correct	3 ms	2900 KB	Output is correct
92	Correct	3 ms	2900 KB	Output is correct
93	Correct	3 ms	2900 KB	Output is correct
94	Correct	4 ms	2920 KB	Output is correct
95	Correct	3 ms	2952 KB	Output is correct
96	Correct	4 ms	2948 KB	Output is correct
97	Correct	4 ms	3216 KB	Output is correct
98	Correct	3 ms	3028 KB	Output is correct
99	Correct	4 ms	3464 KB	Output is correct
100	Correct	3 ms	3012 KB	Output is correct
101	Correct	4 ms	3336 KB	Output is correct
102	Correct	4 ms	2952 KB	Output is correct
103	Correct	3 ms	3028 KB	Output is correct
104	Correct	3 ms	2956 KB	Output is correct
105	Correct	3 ms	3008 KB	Output is correct
106	Correct	49 ms	8708 KB	Output is correct
107	Correct	50 ms	8764 KB	Output is correct
108	Correct	50 ms	8908 KB	Output is correct
109	Correct	54 ms	8824 KB	Output is correct
110	Correct	36 ms	8880 KB	Output is correct
111	Correct	43 ms	10312 KB	Output is correct
112	Correct	68 ms	16716 KB	Output is correct
113	Correct	55 ms	8780 KB	Output is correct
114	Correct	55 ms	8660 KB	Output is correct
115	Correct	34 ms	8604 KB	Output is correct
116	Correct	62 ms	17900 KB	Output is correct
117	Correct	68 ms	16504 KB	Output is correct
118	Correct	33 ms	10052 KB	Output is correct
119	Correct	55 ms	8716 KB	Output is correct
120	Correct	56 ms	8740 KB	Output is correct
121	Correct	54 ms	8780 KB	Output is correct
122	Correct	55 ms	8936 KB	Output is correct
123	Correct	34 ms	8772 KB	Output is correct
124	Correct	33 ms	8740 KB	Output is correct
125	Correct	33 ms	8564 KB	Output is correct
126	Correct	45 ms	8724 KB	Output is correct
127	Correct	48 ms	8768 KB	Output is correct
128	Correct	45 ms	8872 KB	Output is correct
129	Correct	53 ms	8908 KB	Output is correct
130	Correct	34 ms	8872 KB	Output is correct
131	Correct	41 ms	10316 KB	Output is correct
132	Correct	74 ms	16640 KB	Output is correct
133	Correct	55 ms	8780 KB	Output is correct
134	Correct	56 ms	8692 KB	Output is correct
135	Correct	31 ms	8524 KB	Output is correct
136	Correct	69 ms	15772 KB	Output is correct
137	Correct	73 ms	16080 KB	Output is correct
138	Correct	35 ms	9944 KB	Output is correct
139	Correct	59 ms	8720 KB	Output is correct
140	Correct	59 ms	8776 KB	Output is correct
141	Correct	59 ms	8908 KB	Output is correct
142	Correct	63 ms	8856 KB	Output is correct
143	Correct	33 ms	8764 KB	Output is correct
144	Correct	35 ms	8764 KB	Output is correct
145	Correct	31 ms	8576 KB	Output is correct
146	Correct	55 ms	8736 KB	Output is correct
147	Correct	55 ms	8752 KB	Output is correct
148	Correct	54 ms	9248 KB	Output is correct
149	Correct	54 ms	10348 KB	Output is correct
150	Correct	72 ms	19784 KB	Output is correct
151	Correct	63 ms	8852 KB	Output is correct
152	Correct	68 ms	9148 KB	Output is correct
153	Correct	67 ms	9252 KB	Output is correct
154	Correct	52 ms	10304 KB	Output is correct
155	Correct	36 ms	9096 KB	Output is correct
156	Correct	65 ms	17024 KB	Output is correct
157	Correct	64 ms	15876 KB	Output is correct
158	Correct	63 ms	14636 KB	Output is correct
159	Correct	50 ms	8580 KB	Output is correct
160	Correct	71 ms	17952 KB	Output is correct
161	Correct	63 ms	8620 KB	Output is correct
162	Correct	41 ms	8908 KB	Output is correct

답안 #623612

Compilation message

Subtask #1 8.0 / 8.0

Subtask #2 12.0 / 12.0

Subtask #3 30.0 / 30.0

Subtask #4 50.0 / 50.0

Subtask #1
8.0 / 8.0

Subtask #2
12.0 / 12.0

Subtask #3
30.0 / 30.0

Subtask #4
50.0 / 50.0