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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
#214651#2681. How Many Paths?naroto2022506724ms17432kbC++888b2024-11-20 22:59:142024-11-20 23:11:35

answer

#include <bits/stdc++.h>
using namespace std;
const int N=4e5+5;
vector<int>G[N];
int n,m,o[N],vis[N],inst[N];
void dfs(int x){
	vis[x]=inst[x]=o[x]=1;
	for(int i=0;i<G[x].size();i++){
		int y=G[x][i];
		if(!vis[y])dfs(y);
		else if(inst[y])o[y]=-1;
		else if(o[y]!=-1)o[y]=2;
	}
	inst[x]=0;
}
void dfs2(int x,int op){
	vis[x]=1;
	if(o[x]!=-1&&o[x]!=op)o[x]=op;
	for(int i=0;i<G[x].size();i++){
		int y=G[x][i];
		if(!vis[y])dfs2(y,op);
	}
}
inline void mset(int*a){for(int i=0;i<=n;i++)a[i]=0;}
void solve(){
	cin>>n>>m;
	for(int i=0;i<=n;i++)G[i].clear();
	for(int i=1,u,v;i<=m;i++)cin>>u>>v,G[u].push_back(v);
	mset(vis),mset(inst),dfs(1);
	mset(vis);
	for(int i=1;i<=n;i++)if(o[i]==2)dfs2(i,2);
	mset(vis);
	for(int i=1;i<=n;i++)if(o[i]==-1)dfs2(i,-1);
	for(int i=1;i<=n;i++)cout<<o[i]<<' ';puts("");
}
int main(){int T=1;while(T--)mset(o),solve();}

详细

小提示:点击横条可展开更详细的信息

Test #1:

score: 5
Accepted
time: 344ms
memory: 15156kb

input:

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

output:

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

result:

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

Test #2:

score: 5
Accepted
time: 365ms
memory: 15128kb

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: 360ms
memory: 15052kb

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: 5
Accepted
time: 344ms
memory: 15216kb

input:

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

output:

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

result:

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

Test #5:

score: 5
Accepted
time: 343ms
memory: 15252kb

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: 334ms
memory: 15052kb

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: 359ms
memory: 15224kb

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: 346ms
memory: 15248kb

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: 5
Accepted
time: 331ms
memory: 15252kb

input:

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

output:

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

result:

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

Test #10:

score: 5
Accepted
time: 301ms
memory: 15056kb

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
Wrong Answer
time: 327ms
memory: 17428kb

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:

1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 2 2 1 1 1 1 1 1 1 ...

result:

wrong answer 1st lines differ - expected: '1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 ...3 3 3 3 3 3 3 3 3 3 3 3 ...

Test #12:

score: 0
Wrong Answer
time: 339ms
memory: 17432kb

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:

1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ...

result:

wrong answer 1st lines differ - expected: '1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ...3 3 3 3 3 3 3 3 3 3 3 3 ...

Test #13:

score: 0
Wrong Answer
time: 321ms
memory: 17428kb

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:

1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ...

result:

wrong answer 1st lines differ - expected: '1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ...3 3 3 3 3 3 3 3 3 3 3 3 ...

Test #14:

score: 0
Wrong Answer
time: 323ms
memory: 17432kb

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:

1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ...

result:

wrong answer 1st lines differ - expected: '1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 ...3 3 3 3 3 3 3 3 3 3 3 3 ...

Test #15:

score: 0
Wrong Answer
time: 327ms
memory: 17432kb

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:

1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ...

result:

wrong answer 1st lines differ - expected: '1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ...3 3 3 3 3 3 3 3 3 3 3 3 ...

Test #16:

score: 0
Wrong Answer
time: 335ms
memory: 17428kb

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:

1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 ...

result:

wrong answer 1st lines differ - expected: '1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ...3 3 3 3 3 3 3 3 3 3 3 3 ...

Test #17:

score: 0
Wrong Answer
time: 343ms
memory: 17428kb

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:

1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 ...

result:

wrong answer 1st lines differ - expected: '1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ...3 3 3 3 3 3 3 3 3 3 3 3 ...

Test #18:

score: 0
Wrong Answer
time: 330ms
memory: 17432kb

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:

1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 2 2 1 1 2 1 1 1 2 1 1 1 1 1 2 ...

result:

wrong answer 1st lines differ - expected: '1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ...3 3 3 3 3 3 3 3 3 3 3 3 ...

Test #19:

score: 0
Wrong Answer
time: 321ms
memory: 17428kb

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:

1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 2 1 1 1 2 2 2 1 1 ...

result:

wrong answer 1st lines differ - expected: '1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ...3 3 3 3 3 3 3 3 3 3 3 3 ...

Test #20:

score: 0
Wrong Answer
time: 331ms
memory: 17428kb

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:

1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 ...

result:

wrong answer 1st lines differ - expected: '1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ...3 3 3 3 3 3 3 3 3 3 3 3 ...