Task: | Kortit II |
Sender: | a256 |
Submission time: | 2024-11-03 22:22:04 +0200 |
Language: | C++ (C++11) |
Status: | READY |
Result: | 100 |
group | verdict | score |
---|---|---|
#1 | ACCEPTED | 3 |
#2 | ACCEPTED | 5 |
#3 | ACCEPTED | 26 |
#4 | ACCEPTED | 28 |
#5 | ACCEPTED | 38 |
test | verdict | time | group | |
---|---|---|---|---|
#1 | ACCEPTED | 0.04 s | 1, 2, 3, 4, 5 | details |
#2 | ACCEPTED | 0.04 s | 2, 3, 4, 5 | details |
#3 | ACCEPTED | 0.04 s | 3, 4, 5 | details |
#4 | ACCEPTED | 0.04 s | 4, 5 | details |
#5 | ACCEPTED | 0.05 s | 5 | details |
#6 | ACCEPTED | 0.07 s | 5 | details |
Code
#include<bits/stdc++.h>using namespace std;#define ll long long#define N 2001#define M 1000000007int t,n,a,b;ll C[N][N],ncr[N][N],F[N];int main(){cin.tie(0)->sync_with_stdio(0);F[0]=1;for(int i=1;i<N;++i) F[i]=i*F[i-1]%M;for(int i=0;i<N;++i){ncr[i][0]=1;for(int j=1;j<=i;++j) ncr[i][j]=(ncr[i-1][j-1]+ncr[i-1][j])%M;}for(int n=0;n<N;++n){C[n][0]=1;for(int k=1;k<=n;++k) C[n][k]=((k+1)*C[n-1][k]+(n-k)*C[n-1][k-1])%M;}cin>>t;while(t--){cin>>n>>a>>b;if(a+b>n){cout<<"0\n";continue;}ll r=0;for(int i=0,j=1-2*((a+b)&1);i<=a+b;++i,j*=-1){r+=M+ncr[a+b][i]*C[i][a]%M*j;r%=M;}r=r*ncr[n][n-a-b]%M*F[n]%M;cout<<r<<'\n';}}
Test details
Test 1
Group: 1, 2, 3, 4, 5
Verdict: ACCEPTED
input |
---|
54 4 4 0 3 1 3 3 2 2 4 0 4 ... |
correct output |
---|
0 0 0 0 0 ... |
user output |
---|
0 0 0 0 0 ... |
Test 2
Group: 2, 3, 4, 5
Verdict: ACCEPTED
input |
---|
284 6 1 0 5 0 2 7 1 5 7 7 5 ... |
correct output |
---|
0 0 35280 0 36720 ... |
user output |
---|
0 0 35280 0 36720 ... |
Test 3
Group: 3, 4, 5
Verdict: ACCEPTED
input |
---|
841 19 3 12 19 19 13 19 7 13 20 11 15 ... |
correct output |
---|
40291066 0 0 0 0 ... |
user output |
---|
40291066 0 0 0 0 ... |
Test 4
Group: 4, 5
Verdict: ACCEPTED
input |
---|
1000 15 12 6 7 1 6 44 4 26 6 6 5 ... |
correct output |
---|
0 5040 494558320 0 340694548 ... |
user output |
---|
0 5040 494558320 0 340694548 ... |
Test 5
Group: 5
Verdict: ACCEPTED
input |
---|
1000 892 638 599 966 429 655 1353 576 1140 1403 381 910 ... |
correct output |
---|
0 0 0 249098285 0 ... |
user output |
---|
0 0 0 249098285 0 ... |
Test 6
Group: 5
Verdict: ACCEPTED
input |
---|
1000 2000 1107 508 2000 1372 249 2000 588 65 2000 1739 78 ... |
correct output |
---|
750840601 678722180 744501884 159164549 868115056 ... |
user output |
---|
750840601 678722180 744501884 159164549 868115056 ... |