QOJ.ac
QOJ
| ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
|---|---|---|---|---|---|---|---|---|---|
| #827670 | #8428. Partition into Teams | Kazemaru | WA | 6ms | 14872kb | C++14 | 681b | 2024-12-23 08:01:48 | 2024-12-23 08:01:48 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
#define int long long
#define f(i,j,k) for(int i=j;i<=k;++i)
#define g(i,j,k) for(int i=j;i>=k;--i)
int n,m,s,l;
const int N=2e6;
int jc[N],ny[N],mo;
inline int ksm(int x,int p=mo-2,int y=1){for(;p;p/=2,x=x*x%mo)if(p&1)y=x*y%mo;return y;}
inline int C(int n,int m){return (n<m||m<0)?0:jc[n]*ny[m]%mo*ny[n-m]%mo;}
inline void ycl(int n){
jc[0]=1;
f(i,1,n)jc[i]=jc[i-1]*i%mo;
ny[n]=ksm(jc[n]);
g(i,n,1)ny[i-1]=ny[i]*i%mo;
}
int LC(int n,int m){return m?C(n/mo,m/mo)*C(n%mo,m%mo)%mo:1;}
signed main(){
cin>>n>>mo;
ycl(mo-1);
f(i,0,n/2)m=(m+LC(n,i)*LC(n-i,i))%mo;
cout<<(ksm(3,n)-m+mo)*ksm(2)%mo;
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 1ms
memory: 5668kb
input:
5 5
output:
1
result:
ok 1 number(s): "1"
Test #2:
score: 0
Accepted
time: 1ms
memory: 5736kb
input:
5 7
output:
5
result:
ok 1 number(s): "5"
Test #3:
score: 0
Accepted
time: 1ms
memory: 5732kb
input:
789 97
output:
53
result:
ok 1 number(s): "53"
Test #4:
score: 0
Accepted
time: 1ms
memory: 5612kb
input:
98 23
output:
10
result:
ok 1 number(s): "10"
Test #5:
score: 0
Accepted
time: 1ms
memory: 5652kb
input:
398 7
output:
4
result:
ok 1 number(s): "4"
Test #6:
score: 0
Accepted
time: 1ms
memory: 5676kb
input:
272 31
output:
18
result:
ok 1 number(s): "18"
Test #7:
score: 0
Accepted
time: 0ms
memory: 5660kb
input:
920 199
output:
39
result:
ok 1 number(s): "39"
Test #8:
score: 0
Accepted
time: 0ms
memory: 5636kb
input:
390 5167
output:
1236
result:
ok 1 number(s): "1236"
Test #9:
score: 0
Accepted
time: 1ms
memory: 7804kb
input:
445 24337
output:
4546
result:
ok 1 number(s): "4546"
Test #10:
score: 0
Accepted
time: 6ms
memory: 14872kb
input:
28 586501
output:
269032
result:
ok 1 number(s): "269032"
Test #11:
score: 0
Accepted
time: 1ms
memory: 5676kb
input:
304 5
output:
0
result:
ok 1 number(s): "0"
Test #12:
score: -100
Wrong Answer
time: 1ms
memory: 5736kb
input:
7158 41
output:
36
result:
wrong answer 1st numbers differ - expected: '16', found: '36'