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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 |
|---|---|---|---|---|---|---|---|---|---|
| #22655 | #2142. Yurik and Woodwork Lesson | gsh# | AC ✓ | 7ms | 5244kb | C++20 | 774b | 2022-03-10 15:00:34 | 2022-04-30 01:29:50 |
Judging History
answer
#include<algorithm>
#include<iostream>
#include<vector>
#include<cstdio>
using namespace std;
#define For(i,l,r) for(int i=l;i<=r;i++)
#define FOR(i,l,r) for(int i=l;i>=r;i--)
#define P 998244353
#define MAXN 200001
int N,M,fc[MAXN],inv[MAXN];
int get(){int x=0,f=1;char c=getchar();while(c<'0'||c>'9')c=='-'&&(f=-1),c=getchar();while(c>='0'&&c<='9')x=x*10+c-'0',c=getchar();return x*f;}
int pow(int a,int b){int ans=1;while(b)(b&1)&&(ans=1ll*ans*a%P),a=1ll*a*a%P,b>>=1;return ans;}
int C(int a,int b){return 1ll*fc[a]*inv[b]%P*inv[a-b]%P;}
int main()
{
cin>>N>>M;fc[0]=1;For(i,1,N+M)fc[i]=1ll*fc[i-1]*i%P;inv[N+M]=pow(fc[N+M],P-2);FOR(i,N+M-1,0)inv[i]=1ll*inv[i+1]*(i+1)%P;
cout<<1ll*C(N+M-1,M)*C(N+M-1,M-1)%P*pow(N+M-1,P-2)%P<<'\n';
}
//thank you, oeis
详细
Test #1:
score: 100
Accepted
time: 3ms
memory: 3724kb
input:
2 2
output:
3
result:
ok 1 number(s): "3"
Test #2:
score: 0
Accepted
time: 3ms
memory: 3548kb
input:
2 4
output:
10
result:
ok 1 number(s): "10"
Test #3:
score: 0
Accepted
time: 2ms
memory: 3688kb
input:
100 100
output:
818380736
result:
ok 1 number(s): "818380736"
Test #4:
score: 0
Accepted
time: 1ms
memory: 3652kb
input:
1 1
output:
1
result:
ok 1 number(s): "1"
Test #5:
score: 0
Accepted
time: 1ms
memory: 3580kb
input:
1 2
output:
1
result:
ok 1 number(s): "1"
Test #6:
score: 0
Accepted
time: 2ms
memory: 3676kb
input:
1 3
output:
1
result:
ok 1 number(s): "1"
Test #7:
score: 0
Accepted
time: 3ms
memory: 3688kb
input:
1 4
output:
1
result:
ok 1 number(s): "1"
Test #8:
score: 0
Accepted
time: 2ms
memory: 3572kb
input:
1 5
output:
1
result:
ok 1 number(s): "1"
Test #9:
score: 0
Accepted
time: 3ms
memory: 3664kb
input:
2 1
output:
1
result:
ok 1 number(s): "1"
Test #10:
score: 0
Accepted
time: 1ms
memory: 3548kb
input:
2 2
output:
3
result:
ok 1 number(s): "3"
Test #11:
score: 0
Accepted
time: 3ms
memory: 3568kb
input:
2 3
output:
6
result:
ok 1 number(s): "6"
Test #12:
score: 0
Accepted
time: 2ms
memory: 3688kb
input:
2 4
output:
10
result:
ok 1 number(s): "10"
Test #13:
score: 0
Accepted
time: 3ms
memory: 3672kb
input:
2 5
output:
15
result:
ok 1 number(s): "15"
Test #14:
score: 0
Accepted
time: 2ms
memory: 3600kb
input:
3 1
output:
1
result:
ok 1 number(s): "1"
Test #15:
score: 0
Accepted
time: 3ms
memory: 3600kb
input:
3 2
output:
6
result:
ok 1 number(s): "6"
Test #16:
score: 0
Accepted
time: 2ms
memory: 3688kb
input:
3 3
output:
20
result:
ok 1 number(s): "20"
Test #17:
score: 0
Accepted
time: 0ms
memory: 3552kb
input:
3 4
output:
50
result:
ok 1 number(s): "50"
Test #18:
score: 0
Accepted
time: 0ms
memory: 3564kb
input:
3 5
output:
105
result:
ok 1 number(s): "105"
Test #19:
score: 0
Accepted
time: 2ms
memory: 3604kb
input:
4 1
output:
1
result:
ok 1 number(s): "1"
Test #20:
score: 0
Accepted
time: 3ms
memory: 3544kb
input:
4 2
output:
10
result:
ok 1 number(s): "10"
Test #21:
score: 0
Accepted
time: 3ms
memory: 3580kb
input:
4 3
output:
50
result:
ok 1 number(s): "50"
Test #22:
score: 0
Accepted
time: 1ms
memory: 3676kb
input:
4 4
output:
175
result:
ok 1 number(s): "175"
Test #23:
score: 0
Accepted
time: 3ms
memory: 3656kb
input:
4 5
output:
490
result:
ok 1 number(s): "490"
Test #24:
score: 0
Accepted
time: 3ms
memory: 3564kb
input:
5 1
output:
1
result:
ok 1 number(s): "1"
Test #25:
score: 0
Accepted
time: 0ms
memory: 3604kb
input:
5 2
output:
15
result:
ok 1 number(s): "15"
Test #26:
score: 0
Accepted
time: 0ms
memory: 3600kb
input:
5 3
output:
105
result:
ok 1 number(s): "105"
Test #27:
score: 0
Accepted
time: 1ms
memory: 3600kb
input:
5 4
output:
490
result:
ok 1 number(s): "490"
Test #28:
score: 0
Accepted
time: 3ms
memory: 3460kb
input:
5 5
output:
1764
result:
ok 1 number(s): "1764"
Test #29:
score: 0
Accepted
time: 3ms
memory: 3640kb
input:
1 9
output:
1
result:
ok 1 number(s): "1"
Test #30:
score: 0
Accepted
time: 3ms
memory: 3656kb
input:
8 4
output:
4950
result:
ok 1 number(s): "4950"
Test #31:
score: 0
Accepted
time: 2ms
memory: 3576kb
input:
2 48
output:
1176
result:
ok 1 number(s): "1176"
Test #32:
score: 0
Accepted
time: 0ms
memory: 3604kb
input:
57 4
output:
278114495
result:
ok 1 number(s): "278114495"
Test #33:
score: 0
Accepted
time: 1ms
memory: 3652kb
input:
82 51
output:
501711451
result:
ok 1 number(s): "501711451"
Test #34:
score: 0
Accepted
time: 0ms
memory: 3604kb
input:
4909 1
output:
1
result:
ok 1 number(s): "1"
Test #35:
score: 0
Accepted
time: 3ms
memory: 3688kb
input:
30 3890
output:
146479684
result:
ok 1 number(s): "146479684"
Test #36:
score: 0
Accepted
time: 3ms
memory: 3612kb
input:
2081 3619
output:
991511011
result:
ok 1 number(s): "991511011"
Test #37:
score: 0
Accepted
time: 1ms
memory: 3536kb
input:
9511 10
output:
282597455
result:
ok 1 number(s): "282597455"
Test #38:
score: 0
Accepted
time: 3ms
memory: 4004kb
input:
21 36014
output:
305749705
result:
ok 1 number(s): "305749705"
Test #39:
score: 0
Accepted
time: 3ms
memory: 3700kb
input:
10049 6765
output:
275321949
result:
ok 1 number(s): "275321949"
Test #40:
score: 0
Accepted
time: 3ms
memory: 3948kb
input:
13036 23902
output:
885509275
result:
ok 1 number(s): "885509275"
Test #41:
score: 0
Accepted
time: 4ms
memory: 4236kb
input:
1 100000
output:
1
result:
ok 1 number(s): "1"
Test #42:
score: 0
Accepted
time: 4ms
memory: 4440kb
input:
100000 1
output:
1
result:
ok 1 number(s): "1"
Test #43:
score: 0
Accepted
time: 7ms
memory: 5244kb
input:
98765 95678
output:
302812642
result:
ok 1 number(s): "302812642"
Test #44:
score: 0
Accepted
time: 3ms
memory: 5220kb
input:
100000 100000
output:
174524777
result:
ok 1 number(s): "174524777"