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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 | liuzhenhao09 | 100 ✓ | 1921ms | 39952kb | C++20 | 995b | 2024-08-21 15:04:15 | 2024-08-21 15:04:16 |
Judging History
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;
}
详细
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'