답안 #635429

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
635429	2022-08-26T08:57:01 Z	NothingXD	Subtree (INOI20_subtree)	C++17	100 / 100	98 ms	25012 KB

Main

#include<bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef long double ld;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;

void debug_out() { cerr << endl; }

template <typename Head, typename... Tail>
void debug_out(Head H, Tail... T) {
	cerr << " " << H;
	debug_out(T...);
}

#define debug(...) cerr << "(" << #__VA_ARGS__ << "):", debug_out(__VA_ARGS__)
#define all(x) x.begin(), x.end()
#define MP(x, y) make_pair(x, y)
#define F first
#define S second

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

int n, m, dp[maxn][4], h[maxn], par[maxn];
vector<int> g[maxn], ver[maxn];
bool vis[maxn];

int getpar(int v){
	return (par[v] < 0? v: par[v] = getpar(par[v]));
}

void merge(int u, int v){
	if ((u = getpar(u)) == (v = getpar(v))) return;
	if (par[u] > par[v]) swap(u, v);
	par[u] += par[v];
	par[v] = u;
}

int dfs(int v, int p = -1){
	vis[v] = true;
	int mn = h[v];
	for (auto u: g[v]){
		if (!vis[u]){
			h[u] = h[v] + 1;
			mn = min(mn, dfs(u, v));
		}
		if (u != p){
			mn = min(mn, h[u]);
		}
	}
	if (mn < h[v]){
		merge(v, p);
	}
	return mn;
}

int add(int x, int y){
	int res = x + y;
	if (res >= mod) return res - mod;
	if (res < 0) return res + mod;
	return res;
}

int mul(int x, int y){
	return 1ll * x * y % mod;
}

bool cmp(int x, int y){
	return h[x] < h[y];
}

// dp[v][0] = ans
// dp[v][1] = bedone dost
// dp[v][2] = fagat dost khodet nisti
// dp[v][3] = dost hast khodet hasti bagie ham mitunan bashan

void solve(int v, int p = -1){
	vis[v] = true;
	dp[v][0] = dp[v][1] = dp[v][3] = 1;
	bool flg = false;
	for (auto u: g[v]){
		if (!vis[u]){
			solve(u, v);
			if (getpar(u) == getpar(v)){
				dp[v][0] = mul(dp[v][0], dp[u][0] + 1);
				dp[v][3] = mul(dp[v][3], dp[u][3]);
				dp[v][2] = add(dp[u][2], dp[u][3]);
			}
			else{
				dp[v][0] = mul(dp[v][0], dp[u][0] + 1);
				dp[v][1] = mul(dp[v][1], dp[u][0] + 1);
				dp[v][3] = mul(dp[v][3], dp[u][0] + 1);
			}
		}
		else if (u != p && h[u] > h[v]){
			flg = true;
		}
	}
	if (flg){
		int tmp = getpar(v);
		sort(all(ver[tmp]), cmp);
		int k = dp[v][1];
		for (int i = 1; i < ver[tmp].size(); i++){
			dp[v][0] = add(dp[v][0], mul(k, dp[ver[tmp][i]][2]));
			k = mul(k, dp[ver[tmp][i]][1]);
		}
		dp[v][0] = add(dp[v][0], -k);
	}
}

int main(){
	ios_base::sync_with_stdio(false); cin.tie(0);

	memset(par, -1, sizeof par);

	cin >> n >> m;

	for (int i = 1; i <= m; i++){
		int u, v; cin >> u >> v;
		g[u].push_back(v);
		g[v].push_back(u);
	}

	dfs(1);
	for (int i = 1; i <= n; i++){
		int tmp = getpar(i);
		ver[tmp].push_back(i);
	}
	memset(vis, false, sizeof vis);
	solve(1);

	int ans = 0;
	for (int i = 1; i <= n; i++) ans = add(ans, dp[i][0]);

	cout << ans << '\n';

	return 0;
}

Compilation message

Main.cpp: In function 'void solve(int, int)':
Main.cpp:106:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  106 |   for (int i = 1; i < ver[tmp].size(); i++){
      |                   ~~^~~~~~~~~~~~~~~~~

Subtask #1
8.0 / 8.0

#	결과	실행 시간	메모리	Grader output
1	Correct	3 ms	5460 KB	Output is correct
2	Correct	3 ms	5428 KB	Output is correct
3	Correct	3 ms	5460 KB	Output is correct
4	Correct	3 ms	5460 KB	Output is correct
5	Correct	3 ms	5436 KB	Output is correct
6	Correct	3 ms	5460 KB	Output is correct
7	Correct	3 ms	5460 KB	Output is correct
8	Correct	3 ms	5460 KB	Output is correct
9	Correct	3 ms	5460 KB	Output is correct
10	Correct	3 ms	5460 KB	Output is correct
11	Correct	3 ms	5460 KB	Output is correct
12	Correct	3 ms	5460 KB	Output is correct
13	Correct	3 ms	5460 KB	Output is correct
14	Correct	3 ms	5460 KB	Output is correct
15	Correct	3 ms	5460 KB	Output is correct
16	Correct	3 ms	5436 KB	Output is correct
17	Correct	3 ms	5460 KB	Output is correct
18	Correct	3 ms	5432 KB	Output is correct
19	Correct	3 ms	5460 KB	Output is correct
20	Correct	3 ms	5488 KB	Output is correct
21	Correct	3 ms	5460 KB	Output is correct
22	Correct	3 ms	5460 KB	Output is correct
23	Correct	3 ms	5460 KB	Output is correct
24	Correct	3 ms	5460 KB	Output is correct
25	Correct	4 ms	5456 KB	Output is correct
26	Correct	3 ms	5460 KB	Output is correct
27	Correct	3 ms	5460 KB	Output is correct
28	Correct	3 ms	5460 KB	Output is correct
29	Correct	3 ms	5460 KB	Output is correct
30	Correct	3 ms	5460 KB	Output is correct
31	Correct	3 ms	5460 KB	Output is correct
32	Correct	3 ms	5412 KB	Output is correct
33	Correct	3 ms	5460 KB	Output is correct
34	Correct	3 ms	5460 KB	Output is correct
35	Correct	3 ms	5460 KB	Output is correct
36	Correct	3 ms	5460 KB	Output is correct
37	Correct	3 ms	5460 KB	Output is correct
38	Correct	3 ms	5460 KB	Output is correct
39	Correct	3 ms	5460 KB	Output is correct
40	Correct	3 ms	5460 KB	Output is correct
41	Correct	3 ms	5424 KB	Output is correct
42	Correct	3 ms	5460 KB	Output is correct
43	Correct	3 ms	5460 KB	Output is correct
44	Correct	3 ms	5460 KB	Output is correct
45	Correct	3 ms	5428 KB	Output is correct
46	Correct	3 ms	5464 KB	Output is correct
47	Correct	3 ms	5428 KB	Output is correct
48	Correct	3 ms	5460 KB	Output is correct
49	Correct	3 ms	5460 KB	Output is correct
50	Correct	3 ms	5508 KB	Output is correct
51	Correct	3 ms	5460 KB	Output is correct

Subtask #2
12.0 / 12.0

#	결과	실행 시간	메모리	Grader output
1	Correct	3 ms	5460 KB	Output is correct
2	Correct	7 ms	6344 KB	Output is correct
3	Correct	62 ms	14924 KB	Output is correct
4	Correct	54 ms	14924 KB	Output is correct
5	Correct	54 ms	14880 KB	Output is correct
6	Correct	52 ms	14908 KB	Output is correct
7	Correct	77 ms	22784 KB	Output is correct
8	Correct	81 ms	19856 KB	Output is correct
9	Correct	83 ms	19812 KB	Output is correct
10	Correct	47 ms	15472 KB	Output is correct
11	Correct	46 ms	15064 KB	Output is correct
12	Correct	63 ms	14904 KB	Output is correct
13	Correct	56 ms	14796 KB	Output is correct
14	Correct	51 ms	18376 KB	Output is correct
15	Correct	75 ms	24012 KB	Output is correct
16	Correct	81 ms	25012 KB	Output is correct
17	Correct	68 ms	14884 KB	Output is correct
18	Correct	55 ms	14960 KB	Output is correct
19	Correct	57 ms	14836 KB	Output is correct
20	Correct	40 ms	15220 KB	Output is correct
21	Correct	44 ms	15444 KB	Output is correct
22	Correct	50 ms	15288 KB	Output is correct

Subtask #3
30.0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	3 ms	5460 KB	Output is correct
2	Correct	3 ms	5428 KB	Output is correct
3	Correct	3 ms	5460 KB	Output is correct
4	Correct	3 ms	5460 KB	Output is correct
5	Correct	3 ms	5436 KB	Output is correct
6	Correct	3 ms	5460 KB	Output is correct
7	Correct	3 ms	5460 KB	Output is correct
8	Correct	3 ms	5460 KB	Output is correct
9	Correct	3 ms	5460 KB	Output is correct
10	Correct	3 ms	5460 KB	Output is correct
11	Correct	3 ms	5460 KB	Output is correct
12	Correct	3 ms	5460 KB	Output is correct
13	Correct	3 ms	5460 KB	Output is correct
14	Correct	3 ms	5460 KB	Output is correct
15	Correct	3 ms	5460 KB	Output is correct
16	Correct	3 ms	5436 KB	Output is correct
17	Correct	3 ms	5460 KB	Output is correct
18	Correct	3 ms	5432 KB	Output is correct
19	Correct	3 ms	5460 KB	Output is correct
20	Correct	3 ms	5488 KB	Output is correct
21	Correct	3 ms	5460 KB	Output is correct
22	Correct	3 ms	5460 KB	Output is correct
23	Correct	3 ms	5460 KB	Output is correct
24	Correct	3 ms	5460 KB	Output is correct
25	Correct	4 ms	5456 KB	Output is correct
26	Correct	3 ms	5460 KB	Output is correct
27	Correct	3 ms	5460 KB	Output is correct
28	Correct	3 ms	5460 KB	Output is correct
29	Correct	3 ms	5460 KB	Output is correct
30	Correct	3 ms	5460 KB	Output is correct
31	Correct	3 ms	5460 KB	Output is correct
32	Correct	3 ms	5412 KB	Output is correct
33	Correct	3 ms	5460 KB	Output is correct
34	Correct	3 ms	5460 KB	Output is correct
35	Correct	3 ms	5460 KB	Output is correct
36	Correct	3 ms	5460 KB	Output is correct
37	Correct	3 ms	5460 KB	Output is correct
38	Correct	3 ms	5460 KB	Output is correct
39	Correct	3 ms	5460 KB	Output is correct
40	Correct	3 ms	5460 KB	Output is correct
41	Correct	3 ms	5424 KB	Output is correct
42	Correct	3 ms	5460 KB	Output is correct
43	Correct	3 ms	5460 KB	Output is correct
44	Correct	3 ms	5460 KB	Output is correct
45	Correct	3 ms	5428 KB	Output is correct
46	Correct	3 ms	5464 KB	Output is correct
47	Correct	3 ms	5428 KB	Output is correct
48	Correct	3 ms	5460 KB	Output is correct
49	Correct	3 ms	5460 KB	Output is correct
50	Correct	3 ms	5508 KB	Output is correct
51	Correct	3 ms	5460 KB	Output is correct
52	Correct	5 ms	5972 KB	Output is correct
53	Correct	6 ms	5952 KB	Output is correct
54	Correct	5 ms	5868 KB	Output is correct
55	Correct	4 ms	5972 KB	Output is correct
56	Correct	6 ms	6228 KB	Output is correct
57	Correct	4 ms	5972 KB	Output is correct
58	Correct	4 ms	5952 KB	Output is correct
59	Correct	5 ms	6100 KB	Output is correct
60	Correct	5 ms	5956 KB	Output is correct
61	Correct	5 ms	5844 KB	Output is correct
62	Correct	5 ms	5844 KB	Output is correct
63	Correct	4 ms	5972 KB	Output is correct
64	Correct	4 ms	5972 KB	Output is correct
65	Correct	5 ms	5972 KB	Output is correct
66	Correct	5 ms	5952 KB	Output is correct
67	Correct	7 ms	5952 KB	Output is correct
68	Correct	7 ms	6100 KB	Output is correct
69	Correct	6 ms	5952 KB	Output is correct
70	Correct	4 ms	5896 KB	Output is correct
71	Correct	6 ms	5844 KB	Output is correct
72	Correct	5 ms	5844 KB	Output is correct
73	Correct	4 ms	5972 KB	Output is correct
74	Correct	5 ms	5820 KB	Output is correct
75	Correct	5 ms	6100 KB	Output is correct
76	Correct	5 ms	5828 KB	Output is correct
77	Correct	6 ms	6208 KB	Output is correct
78	Correct	5 ms	5844 KB	Output is correct
79	Correct	5 ms	6100 KB	Output is correct
80	Correct	5 ms	5844 KB	Output is correct
81	Correct	7 ms	5952 KB	Output is correct
82	Correct	5 ms	5972 KB	Output is correct
83	Correct	5 ms	5972 KB	Output is correct

Subtask #4
50.0 / 50.0

#	결과	실행 시간	메모리	Grader output
1	Correct	3 ms	5460 KB	Output is correct
2	Correct	3 ms	5428 KB	Output is correct
3	Correct	3 ms	5460 KB	Output is correct
4	Correct	3 ms	5460 KB	Output is correct
5	Correct	3 ms	5436 KB	Output is correct
6	Correct	3 ms	5460 KB	Output is correct
7	Correct	3 ms	5460 KB	Output is correct
8	Correct	3 ms	5460 KB	Output is correct
9	Correct	3 ms	5460 KB	Output is correct
10	Correct	3 ms	5460 KB	Output is correct
11	Correct	3 ms	5460 KB	Output is correct
12	Correct	3 ms	5460 KB	Output is correct
13	Correct	3 ms	5460 KB	Output is correct
14	Correct	3 ms	5460 KB	Output is correct
15	Correct	3 ms	5460 KB	Output is correct
16	Correct	3 ms	5436 KB	Output is correct
17	Correct	3 ms	5460 KB	Output is correct
18	Correct	3 ms	5432 KB	Output is correct
19	Correct	3 ms	5460 KB	Output is correct
20	Correct	3 ms	5488 KB	Output is correct
21	Correct	3 ms	5460 KB	Output is correct
22	Correct	3 ms	5460 KB	Output is correct
23	Correct	3 ms	5460 KB	Output is correct
24	Correct	3 ms	5460 KB	Output is correct
25	Correct	4 ms	5456 KB	Output is correct
26	Correct	3 ms	5460 KB	Output is correct
27	Correct	3 ms	5460 KB	Output is correct
28	Correct	3 ms	5460 KB	Output is correct
29	Correct	3 ms	5460 KB	Output is correct
30	Correct	3 ms	5460 KB	Output is correct
31	Correct	3 ms	5460 KB	Output is correct
32	Correct	3 ms	5412 KB	Output is correct
33	Correct	3 ms	5460 KB	Output is correct
34	Correct	3 ms	5460 KB	Output is correct
35	Correct	3 ms	5460 KB	Output is correct
36	Correct	3 ms	5460 KB	Output is correct
37	Correct	3 ms	5460 KB	Output is correct
38	Correct	3 ms	5460 KB	Output is correct
39	Correct	3 ms	5460 KB	Output is correct
40	Correct	3 ms	5460 KB	Output is correct
41	Correct	3 ms	5424 KB	Output is correct
42	Correct	3 ms	5460 KB	Output is correct
43	Correct	3 ms	5460 KB	Output is correct
44	Correct	3 ms	5460 KB	Output is correct
45	Correct	3 ms	5428 KB	Output is correct
46	Correct	3 ms	5464 KB	Output is correct
47	Correct	3 ms	5428 KB	Output is correct
48	Correct	3 ms	5460 KB	Output is correct
49	Correct	3 ms	5460 KB	Output is correct
50	Correct	3 ms	5508 KB	Output is correct
51	Correct	3 ms	5460 KB	Output is correct
52	Correct	3 ms	5460 KB	Output is correct
53	Correct	7 ms	6344 KB	Output is correct
54	Correct	62 ms	14924 KB	Output is correct
55	Correct	54 ms	14924 KB	Output is correct
56	Correct	54 ms	14880 KB	Output is correct
57	Correct	52 ms	14908 KB	Output is correct
58	Correct	77 ms	22784 KB	Output is correct
59	Correct	81 ms	19856 KB	Output is correct
60	Correct	83 ms	19812 KB	Output is correct
61	Correct	47 ms	15472 KB	Output is correct
62	Correct	46 ms	15064 KB	Output is correct
63	Correct	63 ms	14904 KB	Output is correct
64	Correct	56 ms	14796 KB	Output is correct
65	Correct	51 ms	18376 KB	Output is correct
66	Correct	75 ms	24012 KB	Output is correct
67	Correct	81 ms	25012 KB	Output is correct
68	Correct	68 ms	14884 KB	Output is correct
69	Correct	55 ms	14960 KB	Output is correct
70	Correct	57 ms	14836 KB	Output is correct
71	Correct	40 ms	15220 KB	Output is correct
72	Correct	44 ms	15444 KB	Output is correct
73	Correct	50 ms	15288 KB	Output is correct
74	Correct	5 ms	5972 KB	Output is correct
75	Correct	6 ms	5952 KB	Output is correct
76	Correct	5 ms	5868 KB	Output is correct
77	Correct	4 ms	5972 KB	Output is correct
78	Correct	6 ms	6228 KB	Output is correct
79	Correct	4 ms	5972 KB	Output is correct
80	Correct	4 ms	5952 KB	Output is correct
81	Correct	5 ms	6100 KB	Output is correct
82	Correct	5 ms	5956 KB	Output is correct
83	Correct	5 ms	5844 KB	Output is correct
84	Correct	5 ms	5844 KB	Output is correct
85	Correct	4 ms	5972 KB	Output is correct
86	Correct	4 ms	5972 KB	Output is correct
87	Correct	5 ms	5972 KB	Output is correct
88	Correct	5 ms	5952 KB	Output is correct
89	Correct	7 ms	5952 KB	Output is correct
90	Correct	7 ms	6100 KB	Output is correct
91	Correct	6 ms	5952 KB	Output is correct
92	Correct	4 ms	5896 KB	Output is correct
93	Correct	6 ms	5844 KB	Output is correct
94	Correct	5 ms	5844 KB	Output is correct
95	Correct	4 ms	5972 KB	Output is correct
96	Correct	5 ms	5820 KB	Output is correct
97	Correct	5 ms	6100 KB	Output is correct
98	Correct	5 ms	5828 KB	Output is correct
99	Correct	6 ms	6208 KB	Output is correct
100	Correct	5 ms	5844 KB	Output is correct
101	Correct	5 ms	6100 KB	Output is correct
102	Correct	5 ms	5844 KB	Output is correct
103	Correct	7 ms	5952 KB	Output is correct
104	Correct	5 ms	5972 KB	Output is correct
105	Correct	5 ms	5972 KB	Output is correct
106	Correct	69 ms	14668 KB	Output is correct
107	Correct	71 ms	14508 KB	Output is correct
108	Correct	66 ms	14412 KB	Output is correct
109	Correct	62 ms	14388 KB	Output is correct
110	Correct	52 ms	15396 KB	Output is correct
111	Correct	57 ms	16064 KB	Output is correct
112	Correct	82 ms	19544 KB	Output is correct
113	Correct	82 ms	13632 KB	Output is correct
114	Correct	69 ms	14048 KB	Output is correct
115	Correct	39 ms	15156 KB	Output is correct
116	Correct	78 ms	20736 KB	Output is correct
117	Correct	80 ms	19552 KB	Output is correct
118	Correct	42 ms	15940 KB	Output is correct
119	Correct	74 ms	13640 KB	Output is correct
120	Correct	80 ms	13480 KB	Output is correct
121	Correct	84 ms	13372 KB	Output is correct
122	Correct	98 ms	13352 KB	Output is correct
123	Correct	44 ms	15328 KB	Output is correct
124	Correct	42 ms	15356 KB	Output is correct
125	Correct	39 ms	15272 KB	Output is correct
126	Correct	60 ms	14752 KB	Output is correct
127	Correct	58 ms	14516 KB	Output is correct
128	Correct	76 ms	14392 KB	Output is correct
129	Correct	72 ms	14344 KB	Output is correct
130	Correct	46 ms	15308 KB	Output is correct
131	Correct	52 ms	15928 KB	Output is correct
132	Correct	79 ms	19424 KB	Output is correct
133	Correct	66 ms	13632 KB	Output is correct
134	Correct	80 ms	14104 KB	Output is correct
135	Correct	42 ms	15160 KB	Output is correct
136	Correct	82 ms	19096 KB	Output is correct
137	Correct	79 ms	19288 KB	Output is correct
138	Correct	41 ms	15792 KB	Output is correct
139	Correct	67 ms	13684 KB	Output is correct
140	Correct	82 ms	13496 KB	Output is correct
141	Correct	89 ms	13444 KB	Output is correct
142	Correct	73 ms	13360 KB	Output is correct
143	Correct	46 ms	15288 KB	Output is correct
144	Correct	41 ms	15388 KB	Output is correct
145	Correct	38 ms	15276 KB	Output is correct
146	Correct	84 ms	12772 KB	Output is correct
147	Correct	80 ms	12536 KB	Output is correct
148	Correct	62 ms	12880 KB	Output is correct
149	Correct	78 ms	13860 KB	Output is correct
150	Correct	72 ms	20744 KB	Output is correct
151	Correct	76 ms	12748 KB	Output is correct
152	Correct	95 ms	13132 KB	Output is correct
153	Correct	79 ms	13164 KB	Output is correct
154	Correct	66 ms	14672 KB	Output is correct
155	Correct	45 ms	15236 KB	Output is correct
156	Correct	74 ms	18892 KB	Output is correct
157	Correct	94 ms	18180 KB	Output is correct
158	Correct	73 ms	17192 KB	Output is correct
159	Correct	56 ms	14704 KB	Output is correct
160	Correct	70 ms	21880 KB	Output is correct
161	Correct	56 ms	14668 KB	Output is correct
162	Correct	54 ms	15180 KB	Output is correct

답안 #635429

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