Task: | Kortit II |
Sender: | maweiyin24562 |
Submission time: | 2024-11-02 23:04:09 +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 | 0.05 s | 1, 2, 3, 4, 5 | details |
#2 | ACCEPTED | 0.05 s | 2, 3, 4, 5 | details |
#3 | ACCEPTED | 0.05 s | 3, 4, 5 | details |
#4 | ACCEPTED | 0.05 s | 4, 5 | details |
#5 | ACCEPTED | 0.13 s | 5 | details |
#6 | ACCEPTED | 0.48 s | 5 | details |
Code
#include <bits/stdc++.h>using namespace std;typedef long long ll;const ll MOD=1000000007;const ll N=2009;ll C[N][N];ll P(ll n,ll m){ll res=1;for(ll i=n;i>n-m;i--){res*=i;res%=MOD;}return res;}void M(ll&a,ll b){a=a*b%MOD;}ll ans=1;ll base[N];ll dp[N][N];void query(ll n,ll a,ll b){if(a<b)swap(a,b);ll c=a+b;for(ll i=a;i<=c;i++){ll sum=0;for(ll j=0;j<i-a;j++){sum+=(base[j]*C[i][j+a])%MOD;sum%=MOD;}base[i-a]=(dp[i][a]+MOD-sum)%MOD;}ans=ans*base[b]%MOD;ans=ans*P(n,n)%MOD;cout<<ans%MOD<<endl;}int main(){for(int i=0;i<=2000;i++)C[i][0]=1;for(int i=1;i<=2000;i++){for(int j=1;j<=i;j++){C[i][j]=(C[i-1][j-1]+C[i-1][j])%MOD;}}for(ll i=1;i<=2005;i++){dp[i][0]=1;dp[i][i]=0;for(ll j=1;j<i;j++){dp[i][j]+=((j+1)*dp[i-1][j]+(i-j)*dp[i-1][j-1]);dp[i][j]%=MOD;}}ll Q;cin>>Q;while(Q--){ans=1;memset(base,0,sizeof(base));ll n,a,b;cin>>n>>a>>b;ll c=a+b;if(a==0&&b==0){cout<<P(n,n)%MOD<<endl;continue;}else if(c>n){cout<<0<<endl;continue;}else if(c<n){ans=ans*C[n][c]%MOD;}query(n,a,b);}return 0;}
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 ... |