NOI.AC

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
#213834	#2157. 数列	KXG	100	986ms	47000kb	C++11	559b	2024-11-13 21:09:35	2024-11-13 23:07:56

answer

#include <cstdio>
using namespace std;
int n, p;
long long inv[2000010], invfac[2000010], fac[2000010];
int main() {
    scanf("%d%d", &n, &p);
    inv[1] = 1;
    for (int i = 2; i <= 2 * n; i++) {
        inv[i] = (p - p / i) * inv[p % i] % p;
    }
    invfac[0] = 1;
    fac[0] = 1;
    for (int i = 1; i <= 2 * n; i++) {
        fac[i] = fac[i - 1] * i % p;
        invfac[i] = invfac[i - 1] * inv[i] % p;
    }
    long long ans = fac[2 * n] * invfac[n] % p * invfac[n] % p * inv[n + 1] % p;
    printf("%lld\n", ans);
    return 0;
}

源文件, 语言: C++11

详细

小提示：点击横条可展开更详细的信息

Test #1:

score: 5

Accepted

time: 0ms

memory: 564kb

input:

921 998054347

output:

345389219

result:

ok single line: '345389219'

Test #2:

score: 5

Accepted

time: 0ms

memory: 556kb

input:

926 998064329

output:

458756691

result:

ok single line: '458756691'

Test #3:

score: 5

Accepted

time: 0ms

memory: 568kb

input:

1000 998074327

output:

457273797

result:

ok single line: '457273797'

Test #4:

score: 5

Accepted

time: 0ms

memory: 564kb

input:

952 998084303

output:

329700115

result:

ok single line: '329700115'

Test #5:

score: 5

Accepted

time: 0ms

memory: 568kb

input:

989 998094347

output:

94788253

result:

ok single line: '94788253'

Test #6:

score: 5

Accepted

time: 0ms

memory: 564kb

input:

902 998104313

output:

911969455

result:

ok single line: '911969455'

Test #7:

score: 5

Accepted

time: 0ms

memory: 564kb

input:

914 998114333

output:

827812986

result:

ok single line: '827812986'

Test #8:

score: 5

Accepted

time: 0ms

memory: 568kb

input:

986 998124313

output:

169699253

result:

ok single line: '169699253'

Test #9:

score: 5

Accepted

time: 0ms

memory: 564kb

input:

947 998134339

output:

761932751

result:

ok single line: '761932751'

Test #10:

score: 5

Accepted

time: 0ms

memory: 560kb

input:

934 998144339

output:

42889072

result:

ok single line: '42889072'

Test #11:

score: 5

Accepted

time: 87ms

memory: 47000kb

input:

991572 998154343

output:

277089318

result:

ok single line: '277089318'

Test #12:

score: 5

Accepted

time: 83ms

memory: 44244kb

input:

932800 998164337

output:

945072504

result:

ok single line: '945072504'

Test #13:

score: 5

Accepted

time: 80ms

memory: 42876kb

input:

903603 998174341

output:

29916736

result:

ok single line: '29916736'

Test #14:

score: 5

Accepted

time: 91ms

memory: 45460kb

input:

958646 998184331

output:

802903490

result:

ok single line: '802903490'

Test #15:

score: 5

Accepted

time: 89ms

memory: 46596kb

input:

983016 998194349

output:

802900579

result:

ok single line: '802900579'

Test #16:

score: 5

Accepted

time: 75ms

memory: 43752kb

input:

922347 998204353

output:

228575331

result:

ok single line: '228575331'

Test #17:

score: 5

Accepted

time: 166ms

memory: 46276kb

input:

976053 998214317

output:

982618317

result:

ok single line: '982618317'

Test #18:

score: 5

Accepted

time: 138ms

memory: 45392kb

input:

957300 998224351

output:

514549818

result:

ok single line: '514549818'

Test #19:

score: 5

Accepted

time: 87ms

memory: 43724kb

input:

921760 998234353

output:

470386410

result:

ok single line: '470386410'

Test #20:

score: 5

Accepted

time: 90ms

memory: 43312kb

input:

912948 998244353

output:

129235345

result:

ok single line: '129235345'