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ID题目提交者结果用时内存语言文件大小提交时间测评时间
#214643#2681. How Many Paths?WZRYWZWY351364ms29696kbC++111.5kb2024-11-20 21:56:382024-11-20 23:09:54

answer

#include <bits/stdc++.h> // 自己写的
#define int long long
using namespace std;

const int N = 1e5 + 5, M = 1e6 + 5;

int dfn[N], low[N], sta[N], c[N]; // c[x] x所在强联通分量的编号 
bool vis[N];

vector <int> scc[N], e[N], e2[N]; // 编号为i的强联通分量的所有点

int n, m, _dfn, top, cnt;

void tarjan(int u) {
	dfn[u] = low[u] = ++ _dfn;
	sta[++top] = u; 
	vis[u] = 1;
	
	for (int v : e[u])
		if (!dfn[v]) {
			tarjan(v);
			low[u] = min(low[u], low[v]);
		} else if (vis[v]) low[u] = min(low[u], dfn[v]);
		
	if (low[u] == dfn[u]) {
		cnt ++;
		int v;
		do {
			v = sta[top --];
			vis[v] = 0;
			c[v] = cnt;
			scc[cnt].push_back(v);
		} while (v != u);
	}
}

bool vis2[N];
int f[N];
queue <int> q;

void bfs() {
	while (q.size()) {
		int u = q.front();
		//cout << u << "\n";
		q.pop();
		for (int v : e2[u]) {
			if (scc[v].size() > 1) f[v] = 1e18;
			else f[v] ++;
			q.push(v);
		}
	}
}

signed main() {
	cin.tie(0); ios::sync_with_stdio(0);
	int n, m; cin >> n >> m;
	while (m--) {
		int u, v; cin >> u >> v;
		e[u].push_back(v);
	}
	
	for (int i = 1; i <= n; i++)
		if (!dfn[i]) tarjan(i);
	
	for (int u = 1; u <= n; u++)
		for (int v : e[u]) {
			if (c[u] == c[v]) continue;
			e2[c[u]].push_back(c[v]);
		}
	
	e2[0].push_back(c[1]);
	q.push(0);
	
	bfs();
	for (int i = 1; i <= n; i++) {
		if (f[c[i]] == 1e18)  cout << "3 ";
		else if (f[c[i]] > 1) cout << "2 ";
		else if (f[c[i]] == 1) cout << "1 ";
		else cout << "0 ";
	}
	return 0;
}

详细

小提示:点击横条可展开更详细的信息

Test #1:

score: 0
Time Limit Exceeded

input:

50000 500000
27433 23782
1927 1159
20346 8794
27393 18828
40557 32372
29462 34217
31695 6752
2253 19...

output:


result:


Test #2:

score: 5
Accepted
time: 155ms
memory: 23520kb

input:

50000 500000
30894 37863
18739 43205
26461 20214
15741 957
38985 43365
15978 10327
7414 35300
17146 ...

output:

1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ...

result:

ok single line: '1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ... 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 '

Test #3:

score: 5
Accepted
time: 246ms
memory: 27336kb

input:

50000 500000
38020 5057
495 7556
33072 22521
28583 41495
7199 42249
37197 26482
34166 16408
33429 19...

output:

1 0 2 0 0 2 0 0 0 2 2 2 2 0 0 0 0 2 2 2 0 2 2 0 0 2 0 0 0 0 0 0 0 0 2 0 0 0 0 2 0 0 0 2 0 2 2 0 1 0 ...

result:

ok single line: '1 0 2 0 0 2 0 0 0 2 2 2 2 0 0 ... 0 0 2 1 0 0 0 0 0 0 2 0 2 1 0 '

Test #4:

score: 0
Time Limit Exceeded

input:

50000 500000
9177 925
34439 28325
7099 9560
21204 48849
36028 23762
6297 46964
38036 31855
6292 1832...

output:


result:


Test #5:

score: 5
Accepted
time: 161ms
memory: 23672kb

input:

50000 500000
30632 1595
20715 35227
44119 45259
47444 36877
6942 14652
2864 18557
42367 19431
38615 ...

output:

1 2 0 0 0 0 0 2 0 0 0 0 0 0 2 2 2 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 0 0 2 0 0 0 0 0 0 0 0 ...

result:

ok single line: '1 2 0 0 0 0 0 2 0 0 0 0 0 0 2 ... 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 '

Test #6:

score: 5
Accepted
time: 171ms
memory: 23584kb

input:

50000 500000
33040 23079
35743 21197
49128 38373
36656 46198
17910 29433
45170 24921
28618 34080
100...

output:

1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 1 2 2 0 0 0 0 0 0 0 0 0 2 0 0 0 1 0 0 0 0 0 0 2 ...

result:

ok single line: '1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ... 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 '

Test #7:

score: 5
Accepted
time: 165ms
memory: 23508kb

input:

50000 500000
5226 27470
49597 10290
40326 34407
17000 37084
26244 45989
48273 4706
15981 19231
26219...

output:

1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ...

result:

ok single line: '1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ... 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 '

Test #8:

score: 5
Accepted
time: 317ms
memory: 29696kb

input:

50000 500000
16952 41617
2923 24354
4446 41320
8355 41065
23930 48553
5990 23289
30279 14635
16174 1...

output:

1 0 2 2 2 2 0 0 0 2 1 0 0 2 0 0 0 0 0 2 2 0 2 0 1 0 0 2 0 1 2 0 2 0 2 0 2 2 0 0 0 2 2 2 2 0 0 0 2 2 ...

result:

ok single line: '1 0 2 2 2 2 0 0 0 2 1 0 0 2 0 ... 0 0 2 2 2 0 0 1 2 1 0 2 0 2 0 '

Test #9:

score: 0
Time Limit Exceeded

input:

50000 500000
40140 17583
24758 1389
12331 1829
43385 23986
38136 28093
21088 33706
44519 38558
39908...

output:


result:


Test #10:

score: 5
Accepted
time: 149ms
memory: 23504kb

input:

50000 500000
26128 23615
14751 3541
9682 26585
39984 12641
32407 34611
40404 13491
49939 11363
19404...

output:

1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ...

result:

ok single line: '1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ... 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 '

Test #11:

score: 0
Memory Limit Exceeded

input:

100000 500000
1 2
1 3
1 8
1 10
1 11
1 17
1 48
1 100
1 284
1 3021
1 7857
1 16097
1 18352
1 17333
1 81...

output:


result:


Test #12:

score: 0
Memory Limit Exceeded

input:

100000 500000
1 2
1 4
1 5
1 7
1 8
1 13
1 15
1 587
1 6125
1 8728
1 1965
1 12132
1 8992
1 17819
1 1358...

output:


result:


Test #13:

score: 0
Memory Limit Exceeded

input:

100000 500000
1 2
1 6
1 45
1 68
1 79
1 496
1 546
1 1119
1 1510
1 1665
1 3262
1 4727
1 4879
1 5430
1 ...

output:


result:


Test #14:

score: 0
Memory Limit Exceeded

input:

100000 500000
1 2
1 4
1 8
1 16
1 28
1 58
1 85
1 96
1 106
1 241
1 3315
1 3551
1 13
1 1969
1 12587
1 1...

output:


result:


Test #15:

score: 0
Memory Limit Exceeded

input:

100000 500000
1 2
1 7
1 13
1 15
1 18
1 74
1 277
1 652
1 1116
1 8926
1 9947
1 12793
1 17696
1 1742
1 ...

output:


result:


Test #16:

score: 0
Memory Limit Exceeded

input:

100000 500000
1 2
1 4
1 5
1 7
1 8
1 21
1 26
1 29
1 31
1 254
1 385
1 451
1 678
1 1278
1 2323
1 3775
1...

output:


result:


Test #17:

score: 0
Memory Limit Exceeded

input:

100000 500000
1 2
1 15
1 44
1 60
1 183
1 365
1 582
1 1768
1 1793
1 6193
1 9585
1 12293
1 447
1 9529
...

output:


result:


Test #18:

score: 0
Memory Limit Exceeded

input:

100000 500000
1 2
1 3
1 4
1 65
1 103
1 282
1 3710
1 5403
1 7559
1 4446
1 5382
1 5028
1 18244
1 5690
...

output:


result:


Test #19:

score: 0
Memory Limit Exceeded

input:

100000 500000
1 2
1 6
1 310
1 510
1 643
1 667
1 4289
1 13736
1 15465
1 7212
1 8416
1 8424
1 11633
1 ...

output:


result:


Test #20:

score: 0
Memory Limit Exceeded

input:

100000 500000
1 2
1 4
1 6
1 7
1 10
1 16
1 247
1 433
1 540
1 2050
1 2671
1 13116
1 9660
1 18620
1 107...

output:


result: