QOJ.ac

QOJ

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
#517820#8325. 重塑时光bribritt20 2ms3824kbC++171.3kb2024-08-13 14:02:132024-08-13 14:02:13

Judging History

你现在查看的是最新测评结果

  • [2024-08-13 14:02:13]
  • 评测
  • 测评结果:20
  • 用时:2ms
  • 内存:3824kb
  • [2024-08-13 14:02:13]
  • 提交

answer

#include <bits/stdc++.h>
using namespace std;
const int MOD = 1e9 + 7;
int exp(int a, int b) {
  if(!b) return 1;
  return (1LL*exp(1LL*a*a%MOD,b>>1)*(b&1?a:1))%MOD;
}
/*
int dp[15][14][14][1<<14]; // how many sequences of length i, j pairs, last guy k, bitmask l
main() {
  for(int n=1;n<14;n++) {
    dp[0][0][n-1][0]=1;
    for(int i=0;i<n;i++) for(int j=0;j<n;j++) for(int k=0;k<n;k++) for(int l=0;l<(1<<n);l++) for(int o=0;o<n;o++) if(!(l&(1<<o)) && j+(o==k+1)<n) {
      dp[i+1][j+(o==k+1)][o][l|(1<<o)]+=dp[i][j][k][l];
      if(dp[i+1][j+(o==k+1)][o][l|(1<<o)]>=MOD) dp[i+1][j+(o==k+1)][o][l|(1<<o)]-=MOD;
    }
    cout << "{";
    int s = 0;
    for(int j=0;j<n;j++)
    for(int j=0;j<n;j++) cout<<dp[n][j]
  }
}
main()
*/

vector<int> adj[15];
int fact[16];
main() {
  fact[0]=1; for(int i=1;i<16;i++) fact[i]=(1LL*fact[i-1]*i)%MOD;
  int n, m, k; cin >> n >> m >> k;
  for(int i=0,x,y;i<m;i++) {cin>>x>>y;adj[x-1].push_back(y-1);}
  int dp[1<<n]; fill(dp,dp+(1<<n),0); dp[0]=1;
  for(int i=0;i<(1<<n);i++) for(int j=0;j<n;j++) if(!(i&(1<<j))){
    bool ok = 1;
    for(auto k: adj[j]) if(!(i&(1<<k))) ok=0;
    if(ok) if((dp[i|(1<<j)]+=dp[i])>=MOD) dp[i|(1<<j)]-=MOD;
  }
  cout << (1LL*dp[(1<<n)-1]*exp(fact[n],MOD-2))%MOD<<"\n";
}

详细


Pretests


Final Tests

Test #1:

score: 5
Accepted
time: 0ms
memory: 3620kb

input:

3 2 0
1 2
1 3

output:

333333336

result:

ok single line: '333333336'

Test #2:

score: 0
Wrong Answer
time: 0ms
memory: 3616kb

input:

5 7 5
1 4
2 3
1 2
4 5
2 5
2 4
1 5

output:

425000003

result:

wrong answer 1st lines differ - expected: '895039689', found: '425000003'

Test #3:

score: 0
Wrong Answer
time: 1ms
memory: 3668kb

input:

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

output:

153846155

result:

wrong answer 1st lines differ - expected: '76923078', found: '153846155'

Test #4:

score: 0
Wrong Answer
time: 1ms
memory: 3788kb

input:

14 13 14
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

output:

71428572

result:

wrong answer 1st lines differ - expected: '535714290', found: '71428572'

Test #5:

score: 5
Accepted
time: 1ms
memory: 3632kb

input:

14 13 0
2 9
1 2
1 3
3 8
6 11
2 7
1 5
5 12
2 13
3 14
3 10
3 6
2 4

output:

700595243

result:

ok single line: '700595243'

Test #6:

score: 0
Wrong Answer
time: 1ms
memory: 3716kb

input:

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

output:

530784497

result:

wrong answer 1st lines differ - expected: '465070080', found: '530784497'

Test #7:

score: 5
Accepted
time: 0ms
memory: 3668kb

input:

13 0 13

output:

1

result:

ok single line: '1'

Test #8:

score: 0
Wrong Answer
time: 2ms
memory: 3772kb

input:

14 91 14
3 4
2 10
3 10
1 13
6 8
5 6
10 13
7 8
4 9
4 7
3 7
13 14
2 12
1 3
6 9
9 14
1 10
2 9
7 11
9 11
3 12
8 10
4 13
5 9
11 12
5 14
8 12
8 13
5 13
1 5
6 11
9 13
2 5
1 14
7 14
4 14
3 5
5 11
6 12
1 2
7 10
1 4
1 8
6 10
3 8
6 13
10 14
7 12
10 11
2 13
8 11
11 13
6 7
10 12
3 14
4 5
1 6
2 14
5 10
8 14
4 8
1...

output:

320774361

result:

wrong answer 1st lines differ - expected: '4362623', found: '320774361'

Test #9:

score: 0
Wrong Answer
time: 0ms
memory: 3572kb

input:

9 15 9
1 2
3 5
2 8
4 8
1 4
2 5
2 7
4 5
1 9
6 8
6 9
1 3
3 7
5 9
5 8

output:

862048066

result:

wrong answer 1st lines differ - expected: '426526937', found: '862048066'

Test #10:

score: 0
Wrong Answer
time: 0ms
memory: 3656kb

input:

9 14 9
1 2
1 3
1 4
1 5
1 6
1 7
1 8
1 9
4 5
6 8
4 7
6 7
3 8
4 6

output:

438425929

result:

wrong answer 1st lines differ - expected: '214820829', found: '438425929'

Test #11:

score: 5
Accepted
time: 1ms
memory: 3740kb

input:

13 68 0
1 2
1 3
1 4
1 5
1 6
1 7
1 8
1 9
1 10
1 11
1 12
1 13
2 5
2 6
2 7
2 8
2 9
2 10
2 11
2 12
2 13
3 4
3 5
3 6
3 7
3 8
3 9
3 10
3 11
3 12
3 13
4 5
4 6
4 7
4 8
4 9
4 10
4 11
4 12
4 13
5 6
5 7
5 8
5 9
5 10
5 11
5 12
5 13
6 7
6 8
6 9
6 10
6 11
6 12
6 13
7 8
7 10
7 11
7 12
7 13
8 13
9 10
9 11
9 12
9 13...

output:

65784302

result:

ok single line: '65784302'

Test #12:

score: 0
Wrong Answer
time: 1ms
memory: 3600kb

input:

13 39 13
1 2
1 3
1 4
1 5
1 6
1 7
1 8
1 9
1 10
1 11
1 12
1 13
3 4
3 5
3 6
3 7
3 8
3 9
3 10
3 11
3 12
3 13
4 8
4 9
4 10
4 12
4 13
5 6
5 7
5 10
5 11
5 13
6 7
6 11
6 13
8 9
8 12
8 13
11 13

output:

151688174

result:

wrong answer 1st lines differ - expected: '361557272', found: '151688174'

Test #13:

score: 0
Wrong Answer
time: 1ms
memory: 3712kb

input:

14 11 14
2 13
4 11
4 14
5 14
6 9
6 14
7 11
9 14
10 12
10 14
12 14

output:

673280428

result:

wrong answer 1st lines differ - expected: '696132576', found: '673280428'

Test #14:

score: 0
Wrong Answer
time: 2ms
memory: 3760kb

input:

14 46 14
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 9
2 10
2 11
2 13
2 14
3 4
3 6
3 10
3 11
3 12
3 13
3 14
4 6
4 10
4 11
4 12
4 13
4 14
5 7
5 8
5 9
5 11
5 13
5 14
7 8
7 9
7 14
10 11
10 13
10 14
11 13
11 14
13 14

output:

201182250

result:

wrong answer 1st lines differ - expected: '258614192', found: '201182250'

Test #15:

score: 0
Wrong Answer
time: 2ms
memory: 3756kb

input:

14 70 14
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 7
2 8
2 9
2 10
2 11
2 12
2 13
2 14
3 11
3 13
3 14
4 5
4 7
4 8
4 10
4 11
4 12
4 13
4 14
5 7
5 8
5 10
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 10
7 12
7 13
7 14
8 10
8 12
8 13
8 14
9 11
9 12
9 13
9 14
10 1...

output:

219194743

result:

wrong answer 1st lines differ - expected: '209616080', found: '219194743'

Test #16:

score: 0
Wrong Answer
time: 2ms
memory: 3640kb

input:

14 69 14
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 5
2 6
2 7
2 9
2 10
2 11
2 12
2 13
2 14
3 5
3 6
3 7
3 9
3 10
3 11
3 12
3 13
3 14
4 7
4 8
4 9
4 10
4 11
4 12
4 13
4 14
5 6
5 7
5 9
5 10
5 11
5 12
5 13
5 14
6 7
6 9
6 10
6 11
6 12
6 13
6 14
7 9
7 10
7 11
7 12
7 13
7 14
8 12
8 13
8 14
9 10
...

output:

939640652

result:

wrong answer 1st lines differ - expected: '701202127', found: '939640652'

Test #17:

score: 0
Wrong Answer
time: 1ms
memory: 3672kb

input:

14 15 14
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
4 6
5 9

output:

17857143

result:

wrong answer 1st lines differ - expected: '263013541', found: '17857143'

Test #18:

score: 0
Wrong Answer
time: 2ms
memory: 3824kb

input:

15 17 15
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
3 13
3 15
13 15

output:

411111114

result:

wrong answer 1st lines differ - expected: '963180835', found: '411111114'

Test #19:

score: 0
Wrong Answer
time: 2ms
memory: 3696kb

input:

15 17 15
1 2
1 3
1 4
1 5
1 6
1 7
1 12
1 15
7 12
7 15
8 15
9 15
10 15
11 15
12 15
13 15
14 15

output:

251163719

result:

wrong answer 1st lines differ - expected: '722208430', found: '251163719'

Test #20:

score: 0
Wrong Answer
time: 0ms
memory: 3756kb

input:

15 16 15
1 2
1 3
1 10
2 10
3 10
4 5
4 6
4 7
4 8
4 9
4 10
4 11
4 12
4 13
4 14
4 15

output:

269108671

result:

wrong answer 1st lines differ - expected: '560801339', found: '269108671'