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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
#526386#8702. 狼人杀liuzhenhao09100 ✓1921ms39952kbC++20995b2024-08-21 15:04:152024-08-21 15:04:16

Judging History

你现在查看的是最新测评结果

  • [2024-08-21 15:04:16]
  • 评测
  • 测评结果:100
  • 用时:1921ms
  • 内存:39952kb
  • [2024-08-21 15:04:15]
  • 提交

answer

#include<bits/stdc++.h>
#define int long long
using namespace std;
const int MOD = 1e9 + 7;
int n,m,ans = 0;
int f[160][160 * 160][2];
int qpow(int a,int b){
	int res = 1;
	for( ; b; b >>= 1){
		if(b & 1) res = (res * a) % MOD;
		a = (a * a) % MOD;
	}
	return res;
}
int s(int x){
	return x * (x + 1) / 2;
}
signed main(){
	scanf("%lld %lld",&n,&m);
	f[0][0][0] = 1;
	for(int i = 0; i <= n; i++){
		if(i == m) continue;
		for(int j = 0; j <= n * (n + 1) / 2; j++){
			for(int p = i + 1; p <= n + 1; p++){
				(f[p][j + s(p - i - 1)][0] -= f[i][j][0]) %= MOD;
				(f[p][j + s(p - i - 1)][1] -= f[i][j][1]) %= MOD;
				(f[p][j + s(p - i - 1)][1] -= f[i][j][0] * (p - i - 1 - (i < m && m < p)) % MOD) %= MOD;
			}
		}
	}
	int ans = 0;
	for(int i = 0; i <= s(n); i++){
		int coef = s(n) % MOD * qpow(s(n) - i,MOD - 2) % MOD;
		(ans += coef * f[n + 1][i][1] % MOD) %= MOD; 
	}
	(ans *= qpow(n - 1,MOD - 2)) %= MOD;
	printf("%lld",(ans + MOD) % MOD);
	return 0;
}

詳細信息

Subtask #1:

score: 23
Accepted

Test #1:

score: 23
Accepted
time: 0ms
memory: 3744kb

input:

12 2

output:

183756997

result:

ok single line: '183756997'

Test #2:

score: 23
Accepted
time: 1ms
memory: 3956kb

input:

17 6

output:

97571903

result:

ok single line: '97571903'

Test #3:

score: 23
Accepted
time: 1ms
memory: 3848kb

input:

13 3

output:

209826617

result:

ok single line: '209826617'

Test #4:

score: 23
Accepted
time: 1ms
memory: 3856kb

input:

13 8

output:

176038768

result:

ok single line: '176038768'

Test #5:

score: 23
Accepted
time: 0ms
memory: 3788kb

input:

18 4

output:

288404061

result:

ok single line: '288404061'

Test #6:

score: 23
Accepted
time: 1ms
memory: 3736kb

input:

10 10

output:

219657163

result:

ok single line: '219657163'

Test #7:

score: 23
Accepted
time: 1ms
memory: 3848kb

input:

19 15

output:

590577825

result:

ok single line: '590577825'

Test #8:

score: 23
Accepted
time: 0ms
memory: 3784kb

input:

11 6

output:

488143489

result:

ok single line: '488143489'

Test #9:

score: 23
Accepted
time: 0ms
memory: 3832kb

input:

10 5

output:

470594541

result:

ok single line: '470594541'

Test #10:

score: 23
Accepted
time: 1ms
memory: 3824kb

input:

20 5

output:

582458555

result:

ok single line: '582458555'

Test #11:

score: 23
Accepted
time: 1ms
memory: 3920kb

input:

20 12

output:

648081410

result:

ok single line: '648081410'

Test #12:

score: 23
Accepted
time: 1ms
memory: 4000kb

input:

20 4

output:

335777285

result:

ok single line: '335777285'

Test #13:

score: 23
Accepted
time: 1ms
memory: 3824kb

input:

20 15

output:

389216500

result:

ok single line: '389216500'

Test #14:

score: 23
Accepted
time: 1ms
memory: 3948kb

input:

20 16

output:

582458555

result:

ok single line: '582458555'

Test #15:

score: 23
Accepted
time: 1ms
memory: 3820kb

input:

20 19

output:

589126150

result:

ok single line: '589126150'

Test #16:

score: 23
Accepted
time: 1ms
memory: 3828kb

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: 5112kb

input:

49 14

output:

486918542

result:

ok single line: '486918542'

Test #18:

score: 34
Accepted
time: 2ms
memory: 4188kb

input:

28 13

output:

642223597

result:

ok single line: '642223597'

Test #19:

score: 34
Accepted
time: 0ms
memory: 4340kb

input:

35 23

output:

842346505

result:

ok single line: '842346505'

Test #20:

score: 34
Accepted
time: 9ms
memory: 5024kb

input:

47 11

output:

583647040

result:

ok single line: '583647040'

Test #21:

score: 34
Accepted
time: 3ms
memory: 4300kb

input:

34 30

output:

990970048

result:

ok single line: '990970048'

Test #22:

score: 34
Accepted
time: 0ms
memory: 4288kb

input:

30 7

output:

393675971

result:

ok single line: '393675971'

Test #23:

score: 34
Accepted
time: 6ms
memory: 4704kb

input:

43 5

output:

737421246

result:

ok single line: '737421246'

Test #24:

score: 34
Accepted
time: 2ms
memory: 4160kb

input:

30 21

output:

254760745

result:

ok single line: '254760745'

Test #25:

score: 34
Accepted
time: 1ms
memory: 4140kb

input:

27 22

output:

266692865

result:

ok single line: '266692865'

Test #26:

score: 34
Accepted
time: 2ms
memory: 4660kb

input:

40 12

output:

133652311

result:

ok single line: '133652311'

Test #27:

score: 34
Accepted
time: 2ms
memory: 4196kb

input:

29 4

output:

873892090

result:

ok single line: '873892090'

Test #28:

score: 34
Accepted
time: 11ms
memory: 5344kb

input:

50 46

output:

267950067

result:

ok single line: '267950067'

Test #29:

score: 34
Accepted
time: 7ms
memory: 5364kb

input:

50 11

output:

423642322

result:

ok single line: '423642322'

Test #30:

score: 34
Accepted
time: 11ms
memory: 5360kb

input:

50 43

output:

625476642

result:

ok single line: '625476642'

Test #31:

score: 34
Accepted
time: 11ms
memory: 5348kb

input:

50 36

output:

767166129

result:

ok single line: '767166129'

Test #32:

score: 34
Accepted
time: 12ms
memory: 5264kb

input:

50 14

output:

357467965

result:

ok single line: '357467965'

Test #33:

score: 34
Accepted
time: 7ms
memory: 5348kb

input:

50 30

output:

219673347

result:

ok single line: '219673347'

Test #34:

score: 34
Accepted
time: 11ms
memory: 5340kb

input:

50 44

output:

392786132

result:

ok single line: '392786132'

Test #35:

score: 34
Accepted
time: 11ms
memory: 5280kb

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: 52ms
memory: 8496kb

input:

75 47

output:

668751416

result:

ok single line: '668751416'

Test #37:

score: 43
Accepted
time: 52ms
memory: 8388kb

input:

75 41

output:

310834114

result:

ok single line: '310834114'

Test #38:

score: 43
Accepted
time: 802ms
memory: 29088kb

input:

133 124

output:

57167600

result:

ok single line: '57167600'

Test #39:

score: 43
Accepted
time: 606ms
memory: 26968kb

input:

129 74

output:

751074385

result:

ok single line: '751074385'

Test #40:

score: 43
Accepted
time: 919ms
memory: 30200kb

input:

135 133

output:

759430862

result:

ok single line: '759430862'

Test #41:

score: 43
Accepted
time: 52ms
memory: 8484kb

input:

75 19

output:

967921272

result:

ok single line: '967921272'

Test #42:

score: 43
Accepted
time: 477ms
memory: 24216kb

input:

124 9

output:

641081661

result:

ok single line: '641081661'

Test #43:

score: 43
Accepted
time: 60ms
memory: 8740kb

input:

76 66

output:

465902083

result:

ok single line: '465902083'

Test #44:

score: 43
Accepted
time: 1136ms
memory: 34408kb

input:

142 13

output:

12401929

result:

ok single line: '12401929'

Test #45:

score: 43
Accepted
time: 1622ms
memory: 39952kb

input:

150 5

output:

388058135

result:

ok single line: '388058135'

Test #46:

score: 43
Accepted
time: 283ms
memory: 17860kb

input:

109 97

output:

381109644

result:

ok single line: '381109644'

Test #47:

score: 43
Accepted
time: 1883ms
memory: 39876kb

input:

150 133

output:

174431234

result:

ok single line: '174431234'

Test #48:

score: 43
Accepted
time: 1921ms
memory: 39952kb

input:

150 147

output:

198921722

result:

ok single line: '198921722'

Test #49:

score: 43
Accepted
time: 1883ms
memory: 39700kb

input:

150 142

output:

631473185

result:

ok single line: '631473185'

Test #50:

score: 43
Accepted
time: 1875ms
memory: 39892kb

input:

150 136

output:

743180069

result:

ok single line: '743180069'

Test #51:

score: 43
Accepted
time: 1886ms
memory: 39796kb

input:

150 138

output:

621574340

result:

ok single line: '621574340'

Test #52:

score: 43
Accepted
time: 1749ms
memory: 39800kb

input:

150 119

output:

872660153

result:

ok single line: '872660153'

Test #53:

score: 43
Accepted
time: 1708ms
memory: 39860kb

input:

150 144

output:

939939060

result:

ok single line: '939939060'

Test #54:

score: 43
Accepted
time: 1717ms
memory: 39876kb

input:

150 1

output:

166208360

result:

ok single line: '166208360'

Test #55:

score: 43
Accepted
time: 1696ms
memory: 39692kb

input:

150 75

output:

353929212

result:

ok single line: '353929212'