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ID	Problem	Submitter	Result	Time	Memory	Language	File size	Submit time	Judge time
#487603	#8702. 狼人杀	unknown-name-user	100 ✓	1092ms	31844kb	C++17	841b	2024-07-23 00:46:43	2024-07-23 00:46:43

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[2024-07-23 00:46:43]
评测

测评结果：100
用时：1092ms
内存：31844kb

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[2024-07-23 00:46:43]
提交

answer

#include<bits/stdc++.h>
#define int long long
using namespace std;
const int mod=1e9+7;
int pw(int a,int b)
{
    int ans=1;
	while(b)
	{
        if(b&1)
			ans=ans*a%mod;
        a=a*a%mod;
        b>>=1;
    }
    return ans;
}
int n,m,dp[160][12010][2];
signed main()
{
    cin>>n>>m;
	int t=n*(n+1)/2;
    dp[0][0][0]=1;
    for(int i=0;i<n;i++)
		for(int j=0;j<=t;j++)
			    for(int k=i+1;k<=n;k++)
				{
					int val=(k-i)*(k-i-1+2*(i<m&&k>=m))/2;
					(dp[k][j+val][1]+=mod-dp[i][j][0])%=mod;
					(dp[k][j+val][0]+=mod-dp[i][j][0])%=mod;
					(dp[k][j+val][1]+=mod-dp[i][j][1])%=mod;
				}
    int ans=0;
    int inv=pw(n-1,mod-2);
    for(int i=0;i<t;i++)
        (ans+=(t*pw(t-i,mod-2)%mod*dp[n][i][0]%mod*n%mod*inv%mod)+(mod-t*pw(t-i,mod-2)%mod*dp[n][i][1]%mod*inv%mod))%=mod;
    cout<<ans;
}

Source code, Language: C++17

Details

Tip: Click on the bar to expand more detailed information

Subtask #1:

score: 23

Accepted

Test #1:

score: 23

Accepted

time: 0ms

memory: 3664kb

input:

12 2

output:

183756997

result:

ok single line: '183756997'

Test #2:

score: 23

Accepted

time: 1ms

memory: 3808kb

input:

17 6

output:

97571903

result:

ok single line: '97571903'

Test #3:

score: 23

Accepted

time: 0ms

memory: 3696kb

input:

13 3

output:

209826617

result:

ok single line: '209826617'

Test #4:

score: 23

Accepted

time: 0ms

memory: 3760kb

input:

13 8

output:

176038768

result:

ok single line: '176038768'

Test #5:

score: 23

Accepted

time: 1ms

memory: 3840kb

input:

18 4

output:

288404061

result:

ok single line: '288404061'

Test #6:

score: 23

Accepted

time: 0ms

memory: 3648kb

input:

10 10

output:

219657163

result:

ok single line: '219657163'

Test #7:

score: 23

Accepted

time: 0ms

memory: 3856kb

input:

19 15

output:

590577825

result:

ok single line: '590577825'

Test #8:

score: 23

Accepted

time: 0ms

memory: 3560kb

input:

11 6

output:

488143489

result:

ok single line: '488143489'

Test #9:

score: 23

Accepted

time: 0ms

memory: 3588kb

input:

10 5

output:

470594541

result:

ok single line: '470594541'

Test #10:

score: 23

Accepted

time: 1ms

memory: 3868kb

input:

20 5

output:

582458555

result:

ok single line: '582458555'

Test #11:

score: 23

Accepted

time: 1ms

memory: 3812kb

input:

20 12

output:

648081410

result:

ok single line: '648081410'

Test #12:

score: 23

Accepted

time: 0ms

memory: 3872kb

input:

20 4

output:

335777285

result:

ok single line: '335777285'

Test #13:

score: 23

Accepted

time: 1ms

memory: 3716kb

input:

20 15

output:

389216500

result:

ok single line: '389216500'

Test #14:

score: 23

Accepted

time: 1ms

memory: 3788kb

input:

20 16

output:

582458555

result:

ok single line: '582458555'

Test #15:

score: 23

Accepted

time: 1ms

memory: 3808kb

input:

20 19

output:

589126150

result:

ok single line: '589126150'

Test #16:

score: 23

Accepted

time: 1ms

memory: 3720kb

input:

20 6

output:

389216500

result:

ok single line: '389216500'

Subtask #2:

score: 34

Accepted

Dependency #1:

100%

Accepted

Test #17:

score: 34

Accepted

time: 10ms

memory: 5096kb

input:

49 14

output:

486918542

result:

ok single line: '486918542'

Test #18:

score: 34

Accepted

time: 2ms

memory: 3880kb

input:

28 13

output:

642223597

result:

ok single line: '642223597'

Test #19:

score: 34

Accepted

time: 0ms

memory: 4108kb

input:

35 23

output:

842346505

result:

ok single line: '842346505'

Test #20:

score: 34

Accepted

time: 9ms

memory: 4884kb

input:

47 11

output:

583647040

result:

ok single line: '583647040'

Test #21:

score: 34

Accepted

time: 3ms

memory: 4152kb

input:

34 30

output:

990970048

result:

ok single line: '990970048'

Test #22:

score: 34

Accepted

time: 2ms

memory: 3940kb

input:

30 7

output:

393675971

result:

ok single line: '393675971'

Test #23:

score: 34

Accepted

time: 6ms

memory: 4644kb

input:

43 5

output:

737421246

result:

ok single line: '737421246'

Test #24:

score: 34

Accepted

time: 2ms

memory: 4060kb

input:

30 21

output:

254760745

result:

ok single line: '254760745'

Test #25:

score: 34

Accepted

time: 0ms

memory: 4000kb

input:

27 22

output:

266692865

result:

ok single line: '266692865'

Test #26:

score: 34

Accepted

time: 0ms

memory: 4524kb

input:

40 12

output:

133652311

result:

ok single line: '133652311'

Test #27:

score: 34

Accepted

time: 2ms

memory: 3984kb

input:

29 4

output:

873892090

result:

ok single line: '873892090'

Test #28:

score: 34

Accepted

time: 11ms

memory: 5076kb

input:

50 46

output:

267950067

result:

ok single line: '267950067'

Test #29:

score: 34

Accepted

time: 7ms

memory: 5160kb

input:

50 11

output:

423642322

result:

ok single line: '423642322'

Test #30:

score: 34

Accepted

time: 11ms

memory: 5084kb

input:

50 43

output:

625476642

result:

ok single line: '625476642'

Test #31:

score: 34

Accepted

time: 11ms

memory: 5236kb

input:

50 36

output:

767166129

result:

ok single line: '767166129'

Test #32:

score: 34

Accepted

time: 11ms

memory: 5044kb

input:

50 14

output:

357467965

result:

ok single line: '357467965'

Test #33:

score: 34

Accepted

time: 11ms

memory: 5148kb

input:

50 30

output:

219673347

result:

ok single line: '219673347'

Test #34:

score: 34

Accepted

time: 7ms

memory: 5136kb

input:

50 44

output:

392786132

result:

ok single line: '392786132'

Test #35:

score: 34

Accepted

time: 3ms

memory: 5232kb

input:

50 10

output:

848251616

result:

ok single line: '848251616'

Subtask #3:

score: 43

Accepted

Dependency #1:

100%

Accepted

Dependency #2:

100%

Accepted

Test #36:

score: 43

Accepted

time: 51ms

memory: 8444kb

input:

75 47

output:

668751416

result:

ok single line: '668751416'

Test #37:

score: 43

Accepted

time: 52ms

memory: 8380kb

input:

75 41

output:

310834114

result:

ok single line: '310834114'

Test #38:

score: 43

Accepted

time: 613ms

memory: 26336kb

input:

133 124

output:

57167600

result:

ok single line: '57167600'

Test #39:

score: 43

Accepted

time: 530ms

memory: 25092kb

input:

129 74

output:

751074385

result:

ok single line: '751074385'

Test #40:

score: 43

Accepted

time: 658ms

memory: 27208kb

input:

135 133

output:

759430862

result:

ok single line: '759430862'

Test #41:

score: 43

Accepted

time: 52ms

memory: 8372kb

input:

75 19

output:

967921272

result:

ok single line: '967921272'

Test #42:

score: 43

Accepted

time: 454ms

memory: 23252kb

input:

124 9

output:

641081661

result:

ok single line: '641081661'

Test #43:

score: 43

Accepted

time: 55ms

memory: 8612kb

input:

76 66

output:

465902083

result:

ok single line: '465902083'

Test #44:

score: 43

Accepted

time: 798ms

memory: 29396kb

input:

142 13

output:

12401929

result:

ok single line: '12401929'

Test #45:

score: 43

Accepted

time: 1000ms

memory: 31816kb

input:

150 5

output:

388058135

result:

ok single line: '388058135'

Test #46:

score: 43

Accepted

time: 269ms

memory: 17640kb

input:

109 97

output:

381109644

result:

ok single line: '381109644'

Test #47:

score: 43

Accepted

time: 994ms

memory: 31736kb

input:

150 133

output:

174431234

result:

ok single line: '174431234'

Test #48:

score: 43

Accepted

time: 1005ms

memory: 31804kb

input:

150 147

output:

198921722

result:

ok single line: '198921722'

Test #49:

score: 43

Accepted

time: 1009ms

memory: 31788kb

input:

150 142

output:

631473185

result:

ok single line: '631473185'

Test #50:

score: 43

Accepted

time: 1051ms

memory: 31844kb

input:

150 136

output:

743180069

result:

ok single line: '743180069'

Test #51:

score: 43

Accepted

time: 999ms

memory: 31724kb

input:

150 138

output:

621574340

result:

ok single line: '621574340'

Test #52:

score: 43

Accepted

time: 1020ms

memory: 31732kb

input:

150 119

output:

872660153

result:

ok single line: '872660153'

Test #53:

score: 43

Accepted

time: 1019ms

memory: 31788kb

input:

150 144

output:

939939060

result:

ok single line: '939939060'

Test #54:

score: 43

Accepted

time: 994ms

memory: 31728kb

input:

150 1

output:

166208360

result:

ok single line: '166208360'

Test #55:

score: 43

Accepted

time: 1092ms

memory: 31708kb

input:

150 75

output:

353929212

result:

ok single line: '353929212'