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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
#659888#9488. Do Not Turn Backucup-team134#AC ✓795ms4584kbC++171.8kb2024-10-19 23:02:422024-10-19 23:02:43

Judging History

你现在查看的是最新测评结果

  • [2024-10-19 23:02:43]
  • 评测
  • 测评结果:AC
  • 用时:795ms
  • 内存:4584kb
  • [2024-10-19 23:02:42]
  • 提交

answer

#include <bits/stdc++.h>

#define ll long long
#define pb push_back
#define f first
#define s second
#define sz(x) (int)(x).size()
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define ios ios_base::sync_with_stdio(false);cin.tie(NULL)
#define ld long double
#define li __int128

using namespace std;

mt19937 rng(time(NULL));

const int mod=998244353;
int add(int a,int b){
    a+=b;
    if(a>=mod)
        a-=mod;
    return a;
}
int sub(int a,int b){
    a-=b;
    if(a<0)
        a+=mod;
    return a;
}
int mul(int a,int b){
    return (long long)a*b%mod;
}
vector<vector<int>> mul(vector<vector<int>> &a,vector<vector<int>> &b){
	vector<vector<int>> ans(sz(a),vector<int>(sz(b[0])));
	for(int i=0;i<sz(a);i++){
		for(int j=0;j<sz(b[0]);j++){
			for(int k=0;k<sz(a[0]);k++){
				ans[i][j]=add(ans[i][j],mul(a[i][k],b[k][j]));
			}
		}
	}
	return ans;
}
vector<vector<int>> pwrmod(vector<vector<int>> a,int k){
	vector<vector<int>> ans=a;
	k--;
	for(;k;k>>=1,a=mul(a,a))
		if(k&1)
			ans=mul(ans,a);
	return ans;
}
int main()
{
	int n,m,k;
	cin >> n >> m >> k;
	vector<vector<int>> mat(2*n,vector<int>(2*n));
	vector<vector<int>> start(1,vector<int>(2*n));
	vector<int> deg(n);
	vector<vector<int>> graf(n);
	for(int i=0;i<m;i++){
		int u,v;
		cin >> u >> v;
		u--;v--;
		mat[u][v]=mat[v][u]=1;
		deg[u]++;
		deg[v]++;
		graf[u].pb(v);
		graf[v].pb(u);
	}
	for(int i=0;i<n;i++){
		mat[i][i+n]=1;
		mat[i+n][i]=mod-deg[i]+1;
	}
	for(auto p:graf[0]){
		start[0][n+p]=1;
	}
	for(auto p:graf[0]){
		for(auto d:graf[p]){
			start[0][d]++;
		}
	}
	start[0][0]=0;
	k--;
	if(k==0){
		printf("%i\n",start[0][n+n-1]);
		return 0;
	}
	vector<vector<int>> st=pwrmod(mat,k);
	start=mul(start,st);
	printf("%i\n",start[0][n+n-1]);
	return 0;
}

详细

Test #1:

score: 100
Accepted
time: 0ms
memory: 3776kb

input:

6 8 5
1 2
1 3
2 3
2 4
3 5
4 5
4 6
5 6

output:

2

result:

ok "2"

Test #2:

score: 0
Accepted
time: 1ms
memory: 3880kb

input:

11 11 2023
1 2
2 3
3 4
4 5
5 6
6 7
7 8
8 9
9 10
10 11
1 11

output:

1

result:

ok "1"

Test #3:

score: 0
Accepted
time: 1ms
memory: 3772kb

input:

7 21 1000000000
1 2
1 3
1 4
1 5
1 6
1 7
2 3
2 4
2 5
2 6
2 7
3 4
3 5
3 6
3 7
4 5
4 6
4 7
5 6
5 7
6 7

output:

405422475

result:

ok "405422475"

Test #4:

score: 0
Accepted
time: 1ms
memory: 3884kb

input:

12 56 78144853
1 2
1 3
1 4
1 6
1 7
1 9
1 10
1 11
1 12
2 4
2 5
2 6
2 8
2 9
2 10
2 11
2 12
3 4
3 5
3 6
3 7
3 8
3 9
3 11
3 12
4 5
4 6
4 7
4 8
4 9
4 10
4 11
4 12
5 6
5 7
5 8
5 9
5 10
5 11
5 12
6 8
6 9
6 10
7 8
7 9
7 11
7 12
8 9
8 10
8 11
8 12
9 10
9 11
9 12
10 11
11 12

output:

843326021

result:

ok "843326021"

Test #5:

score: 0
Accepted
time: 2ms
memory: 3856kb

input:

13 61 268435455
1 2
1 3
1 4
1 5
1 6
1 8
1 9
1 10
1 11
1 12
1 13
2 3
2 4
2 5
2 6
2 7
2 8
2 9
2 12
2 13
3 4
3 5
3 6
3 7
3 8
3 9
3 10
4 6
4 7
4 9
4 12
4 13
5 6
5 7
5 9
5 11
5 13
6 7
6 8
6 9
6 11
6 12
6 13
7 8
7 10
7 11
7 12
8 9
8 10
8 11
8 12
8 13
9 10
9 12
9 13
10 11
10 12
10 13
11 12
11 13
12 13

output:

69651169

result:

ok "69651169"

Test #6:

score: 0
Accepted
time: 0ms
memory: 4064kb

input:

14 79 33554431
1 2
1 3
1 4
1 5
1 6
1 7
1 8
1 9
1 10
1 11
1 12
1 13
1 14
2 3
2 4
2 5
2 6
2 7
2 8
2 11
2 12
2 14
3 5
3 6
3 7
3 8
3 9
3 10
3 11
3 12
3 13
3 14
4 5
4 6
4 7
4 8
4 9
4 11
4 12
5 6
5 7
5 10
5 11
5 12
5 13
5 14
6 7
6 8
6 9
6 10
6 11
6 12
6 13
6 14
7 8
7 9
7 10
7 11
7 12
7 13
7 14
8 10
8 11
8...

output:

793621538

result:

ok "793621538"

Test #7:

score: 0
Accepted
time: 2ms
memory: 3860kb

input:

15 92 439487671
1 2
1 3
1 5
1 7
1 8
1 9
1 10
1 11
1 13
1 14
1 15
2 3
2 4
2 5
2 6
2 7
2 8
2 9
2 10
2 11
2 12
2 13
2 14
2 15
3 4
3 5
3 6
3 7
3 8
3 9
3 10
3 11
3 12
3 13
3 14
3 15
4 5
4 6
4 7
4 8
4 9
4 10
4 11
4 12
4 13
4 14
4 15
5 7
5 8
5 10
5 11
5 12
5 13
5 14
6 7
6 8
6 9
6 10
6 11
6 12
6 13
6 14
6 1...

output:

196201187

result:

ok "196201187"

Test #8:

score: 0
Accepted
time: 1ms
memory: 3844kb

input:

5 10 230391930
1 2
1 3
1 4
1 5
2 3
2 4
2 5
3 4
3 5
4 5

output:

552614127

result:

ok "552614127"

Test #9:

score: 0
Accepted
time: 0ms
memory: 3872kb

input:

5 8 268435455
1 2
1 3
1 4
2 3
2 4
2 5
3 4
4 5

output:

666456772

result:

ok "666456772"

Test #10:

score: 0
Accepted
time: 1ms
memory: 3872kb

input:

6 13 67108863
1 2
1 3
1 4
1 5
2 4
2 5
2 6
3 4
3 5
3 6
4 5
4 6
5 6

output:

317571510

result:

ok "317571510"

Test #11:

score: 0
Accepted
time: 1ms
memory: 3824kb

input:

7 18 67108863
1 2
1 3
1 4
1 5
1 6
1 7
2 3
2 4
2 5
2 6
2 7
3 5
3 6
4 5
4 6
4 7
5 6
6 7

output:

921436359

result:

ok "921436359"

Test #12:

score: 0
Accepted
time: 0ms
memory: 3732kb

input:

11 43 115349891
1 2
1 3
1 4
1 5
1 6
1 7
1 8
1 9
1 10
2 3
2 6
2 7
2 8
2 9
2 11
3 4
3 5
3 8
3 9
3 10
4 5
4 6
4 7
4 8
4 9
4 11
5 6
5 7
5 9
5 10
5 11
6 7
6 9
6 10
6 11
7 8
7 9
7 10
7 11
8 9
8 11
9 10
9 11

output:

853336717

result:

ok "853336717"

Test #13:

score: 0
Accepted
time: 2ms
memory: 3892kb

input:

14 78 758166229
1 2
1 3
1 4
1 5
1 6
1 7
1 8
1 9
1 10
1 11
1 12
1 13
1 14
2 3
2 4
2 5
2 6
2 7
2 8
2 10
2 11
2 14
3 5
3 6
3 7
3 8
3 9
3 10
3 11
4 5
4 6
4 7
4 8
4 9
4 10
4 11
4 13
4 14
5 6
5 7
5 8
5 9
5 10
5 11
5 13
5 14
6 7
6 8
6 9
6 10
6 11
6 12
6 14
7 8
7 9
7 10
7 11
7 12
7 13
7 14
8 9
8 10
8 11
8 1...

output:

949739691

result:

ok "949739691"

Test #14:

score: 0
Accepted
time: 81ms
memory: 4224kb

input:

52 51 376665160
1 2
1 3
2 4
4 5
5 6
5 7
3 8
5 9
5 10
5 11
6 12
4 13
2 14
6 15
14 16
9 17
8 18
15 19
11 20
9 21
1 22
21 23
3 24
24 25
24 26
10 27
7 28
24 29
16 30
6 31
4 32
5 33
10 34
33 35
32 36
19 37
29 38
18 39
17 40
13 41
39 42
3 43
12 44
34 45
20 46
38 47
27 48
43 49
5 50
6 51
4 52

output:

0

result:

ok "0"

Test #15:

score: 0
Accepted
time: 1ms
memory: 3828kb

input:

29 28 4
1 2
1 3
2 4
1 5
3 6
3 7
6 8
4 9
3 10
6 11
10 12
4 13
3 14
9 15
6 16
14 17
16 18
11 19
19 20
8 21
6 22
18 23
18 24
3 25
2 26
8 27
1 28
8 29

output:

1

result:

ok "1"

Test #16:

score: 0
Accepted
time: 663ms
memory: 4340kb

input:

99 98 33554431
46 94
29 46
29 75
50 75
50 61
6 61
6 10
10 49
38 49
38 86
37 86
37 66
31 66
31 71
41 71
41 67
22 67
22 52
52 62
62 74
74 89
53 89
53 91
69 91
40 69
40 97
45 97
9 45
9 18
18 23
23 25
25 43
43 92
3 92
3 5
5 28
28 58
19 58
17 19
17 80
4 80
4 56
24 56
21 24
1 21
1 95
51 95
36 51
36 96
20 ...

output:

0

result:

ok "0"

Test #17:

score: 0
Accepted
time: 1ms
memory: 4172kb

input:

98 97 2
1 2
2 3
2 4
2 5
2 6
2 7
2 8
2 9
2 10
2 11
2 12
2 13
2 14
2 15
2 16
2 17
2 18
2 19
2 20
2 21
2 22
2 23
2 24
2 25
2 26
2 27
2 28
2 29
2 30
2 31
2 32
2 33
2 34
2 35
2 36
2 37
2 38
2 39
2 40
2 41
2 42
2 43
2 44
2 45
2 46
2 47
2 48
2 49
2 50
2 51
2 52
2 53
2 54
2 55
2 56
2 57
2 58
2 59
2 60
2 61
...

output:

1

result:

ok "1"

Test #18:

score: 0
Accepted
time: 432ms
memory: 4584kb

input:

91 91 68838384
35 46
29 46
29 75
50 75
50 61
6 61
6 10
10 49
38 49
38 86
37 86
37 66
31 66
31 71
41 71
41 67
22 67
22 52
52 62
62 74
74 89
53 89
53 91
69 91
40 69
40 79
45 79
9 45
9 18
18 23
23 25
25 43
12 43
3 12
3 5
5 28
28 58
19 58
17 19
17 80
4 80
4 56
24 56
21 24
1 21
1 64
51 64
36 51
36 47
20 ...

output:

1

result:

ok "1"

Test #19:

score: 0
Accepted
time: 495ms
memory: 4384kb

input:

92 92 860263916
30 45
45 60
60 66
66 78
15 78
9 15
9 14
14 35
35 37
37 85
24 85
24 65
64 65
10 64
10 53
32 53
22 32
22 51
51 80
80 92
77 92
43 77
33 43
33 39
39 82
6 82
2 6
2 88
40 88
40 58
25 58
25 72
72 91
7 91
7 8
8 57
48 57
21 48
21 68
68 79
55 79
12 55
12 38
1 38
1 90
63 90
13 63
13 44
44 54
47...

output:

1

result:

ok "1"

Test #20:

score: 0
Accepted
time: 458ms
memory: 4512kb

input:

91 4095 412854823
1 2
1 3
1 4
1 5
1 6
1 7
1 8
1 9
1 10
1 11
1 12
1 13
1 14
1 15
1 16
1 17
1 18
1 19
1 20
1 21
1 22
1 23
1 24
1 25
1 26
1 27
1 28
1 29
1 30
1 31
1 32
1 33
1 34
1 35
1 36
1 37
1 38
1 39
1 40
1 41
1 42
1 43
1 44
1 45
1 46
1 47
1 48
1 49
1 50
1 51
1 52
1 53
1 54
1 55
1 56
1 57
1 58
1 59
...

output:

309435713

result:

ok "309435713"

Test #21:

score: 0
Accepted
time: 560ms
memory: 4368kb

input:

92 4186 67108863
1 2
1 3
1 4
1 5
1 6
1 7
1 8
1 9
1 10
1 11
1 12
1 13
1 14
1 15
1 16
1 17
1 18
1 19
1 20
1 21
1 22
1 23
1 24
1 25
1 26
1 27
1 28
1 29
1 30
1 31
1 32
1 33
1 34
1 35
1 36
1 37
1 38
1 39
1 40
1 41
1 42
1 43
1 44
1 45
1 46
1 47
1 48
1 49
1 50
1 51
1 52
1 53
1 54
1 55
1 56
1 57
1 58
1 59
1...

output:

445773689

result:

ok "445773689"

Test #22:

score: 0
Accepted
time: 633ms
memory: 4400kb

input:

93 4278 536870911
1 2
1 3
1 4
1 5
1 6
1 7
1 8
1 9
1 10
1 11
1 12
1 13
1 14
1 15
1 16
1 17
1 18
1 19
1 20
1 21
1 22
1 23
1 24
1 25
1 26
1 27
1 28
1 29
1 30
1 31
1 32
1 33
1 34
1 35
1 36
1 37
1 38
1 39
1 40
1 41
1 42
1 43
1 44
1 45
1 46
1 47
1 48
1 49
1 50
1 51
1 52
1 53
1 54
1 55
1 56
1 57
1 58
1 59
...

output:

664971360

result:

ok "664971360"

Test #23:

score: 0
Accepted
time: 629ms
memory: 4392kb

input:

94 4371 531304381
1 2
1 3
1 4
1 5
1 6
1 7
1 8
1 9
1 10
1 11
1 12
1 13
1 14
1 15
1 16
1 17
1 18
1 19
1 20
1 21
1 22
1 23
1 24
1 25
1 26
1 27
1 28
1 29
1 30
1 31
1 32
1 33
1 34
1 35
1 36
1 37
1 38
1 39
1 40
1 41
1 42
1 43
1 44
1 45
1 46
1 47
1 48
1 49
1 50
1 51
1 52
1 53
1 54
1 55
1 56
1 57
1 58
1 59
...

output:

33852961

result:

ok "33852961"

Test #24:

score: 0
Accepted
time: 1ms
memory: 3856kb

input:

10 38 187055368
1 2
1 3
1 5
1 6
1 8
1 9
1 10
2 3
2 4
2 5
2 6
2 7
2 8
2 9
2 10
3 4
3 5
3 6
3 7
3 8
3 9
3 10
4 5
4 6
4 7
4 8
4 9
5 7
5 8
5 9
5 10
6 7
6 8
6 9
6 10
7 8
7 10
8 10

output:

174346166

result:

ok "174346166"

Test #25:

score: 0
Accepted
time: 18ms
memory: 3860kb

input:

31 395 508956048
1 2
1 3
1 4
1 5
1 6
1 7
1 8
1 9
1 10
1 12
1 14
1 15
1 16
1 17
1 18
1 19
1 20
1 21
1 23
1 24
1 25
1 26
1 27
1 28
1 30
1 31
2 3
2 4
2 5
2 6
2 7
2 8
2 9
2 10
2 11
2 12
2 13
2 14
2 16
2 17
2 18
2 19
2 20
2 22
2 23
2 24
2 25
2 26
2 27
2 28
2 29
2 30
2 31
3 4
3 5
3 7
3 8
3 9
3 10
3 11
3 1...

output:

898454226

result:

ok "898454226"

Test #26:

score: 0
Accepted
time: 52ms
memory: 4180kb

input:

46 843 103688348
1 2
1 3
1 4
1 5
1 7
1 8
1 9
1 10
1 11
1 12
1 13
1 14
1 15
1 16
1 17
1 18
1 19
1 20
1 21
1 22
1 23
1 24
1 25
1 26
1 27
1 28
1 29
1 30
1 31
1 33
1 34
1 35
1 36
1 37
1 38
1 41
1 42
1 43
1 44
1 45
2 3
2 4
2 5
2 6
2 7
2 9
2 10
2 11
2 12
2 13
2 14
2 15
2 16
2 18
2 19
2 20
2 22
2 23
2 26
2...

output:

804037438

result:

ok "804037438"

Test #27:

score: 0
Accepted
time: 426ms
memory: 4248kb

input:

81 2612 536870911
1 2
1 3
1 4
1 5
1 6
1 7
1 8
1 9
1 10
1 11
1 12
1 13
1 14
1 15
1 16
1 17
1 18
1 19
1 21
1 22
1 24
1 25
1 26
1 27
1 28
1 29
1 30
1 31
1 32
1 33
1 34
1 36
1 37
1 38
1 39
1 40
1 41
1 42
1 43
1 44
1 45
1 46
1 47
1 49
1 50
1 51
1 52
1 53
1 55
1 56
1 57
1 58
1 59
1 60
1 61
1 63
1 64
1 65
...

output:

439960927

result:

ok "439960927"

Test #28:

score: 0
Accepted
time: 694ms
memory: 4448kb

input:

98 3845 134217727
1 2
1 3
1 4
1 5
1 6
1 7
1 8
1 9
1 10
1 11
1 13
1 15
1 16
1 17
1 18
1 20
1 21
1 22
1 23
1 24
1 26
1 27
1 30
1 32
1 33
1 34
1 35
1 38
1 40
1 41
1 42
1 44
1 45
1 46
1 48
1 49
1 50
1 51
1 52
1 53
1 56
1 57
1 58
1 59
1 60
1 61
1 62
1 63
1 64
1 65
1 66
1 67
1 68
1 69
1 71
1 72
1 74
1 75
...

output:

687576024

result:

ok "687576024"

Test #29:

score: 0
Accepted
time: 33ms
memory: 3876kb

input:

38 559 33554431
1 2
1 3
1 6
1 7
1 8
1 9
1 10
1 11
1 12
1 14
1 15
1 16
1 18
1 20
1 21
1 23
1 25
1 26
1 27
1 28
1 29
1 30
1 31
1 32
1 33
1 34
1 35
1 38
2 4
2 5
2 6
2 8
2 9
2 10
2 11
2 12
2 13
2 14
2 15
2 16
2 18
2 19
2 20
2 21
2 22
2 24
2 25
2 26
2 28
2 29
2 30
2 31
2 32
2 34
3 4
3 5
3 6
3 7
3 8
3 9
3...

output:

245031029

result:

ok "245031029"

Test #30:

score: 0
Accepted
time: 116ms
memory: 4052kb

input:

53 1106 268435455
1 2
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1 53
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2 9
2 10
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2 13
2 14
...

output:

437352844

result:

ok "437352844"

Test #31:

score: 0
Accepted
time: 50ms
memory: 3916kb

input:

43 725 710015779
1 2
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2 20
2 21
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2 24
2 26
2 27
2 29
2 32
2 3...

output:

287707534

result:

ok "287707534"

Test #32:

score: 0
Accepted
time: 197ms
memory: 4160kb

input:

66 1737 67108863
1 2
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1 64
1 66
2 4
2 5
2 6
2 7
2 8
2 9
2 10
2 11
2...

output:

655903832

result:

ok "655903832"

Test #33:

score: 0
Accepted
time: 17ms
memory: 3792kb

input:

29 327 815825607
1 2
1 3
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2 29
3 4
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3 7
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3 10
3 11
3 12
3 13
3 15
3 16
3 17
3 18
3 20
...

output:

3611745

result:

ok "3611745"

Test #34:

score: 0
Accepted
time: 795ms
memory: 4460kb

input:

100 4950 536870911
1 2
1 3
1 4
1 5
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1 56
1 57
1 58
1 59...

output:

77654284

result:

ok "77654284"

Test #35:

score: 0
Accepted
time: 792ms
memory: 4448kb

input:

100 3962 536870911
1 2
1 3
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1 5
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1 51
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1 54
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1 57
1 58
1 60
1 61
1 62
1 63
1 64
1 65
1 67...

output:

277610741

result:

ok "277610741"

Test #36:

score: 0
Accepted
time: 768ms
memory: 4404kb

input:

99 3919 536870911
1 2
1 3
1 4
1 5
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1 9
1 10
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1 57
1 58
1 59
1 60
1 62
1 63
1 64
1 65
1 66
1 67
1 68
1 70
1 7...

output:

377999899

result:

ok "377999899"

Extra Test:

score: 0
Extra Test Passed