Task: | Kortit II |
Sender: | Vludo |
Submission time: | 2024-11-10 23:52:39 +0200 |
Language: | C++ (C++20) |
Status: | READY |
Result: | 62 |
group | verdict | score |
---|---|---|
#1 | ACCEPTED | 3 |
#2 | ACCEPTED | 5 |
#3 | ACCEPTED | 26 |
#4 | ACCEPTED | 28 |
#5 | RUNTIME ERROR | 0 |
test | verdict | time | group | |
---|---|---|---|---|
#1 | ACCEPTED | 0.01 s | 1, 2, 3, 4, 5 | details |
#2 | ACCEPTED | 0.01 s | 2, 3, 4, 5 | details |
#3 | ACCEPTED | 0.01 s | 3, 4, 5 | details |
#4 | ACCEPTED | 0.01 s | 4, 5 | details |
#5 | RUNTIME ERROR | 0.01 s | 5 | details |
#6 | RUNTIME ERROR | 0.01 s | 5 | details |
Code
#include<bits/stdc++.h>using namespace std;#define forn(i,n) for(int i=0;i<n;++i)#define forN(i,k,n) for(int i=k;i<n;++i)#define pb push_back#define F first#define S second#define all(x) (x.begin()),(x.end())#define rall(x) (x.rbegin()),(x.rend())typedef long long ll;typedef pair<int,int> pii;typedef pair<ll,ll> pll;#define inf ((int)(1.01e9))#define mod ((int)(1e9+7))#define N ((int)(101))ll n, m, a, b;ll arr[N+2][N+2][N+2], fact[N+2];ll rev(ll a, ll m) {if (a==1) return 1;return (1-rev(m%a, a)*m) / a + m;}ll nCr(ll n, ll r) {if (!r) return 1;return (fact[n]%mod * rev(fact[r], mod)%mod * rev(fact[n-r], mod)%mod)%mod;}void solve() {cin >> m >> a >> b;if (m < a + b || ((!b)&&a) || ((!a)&&b)) {cout << "0" << endl;return;}if (a > b) swap(a,b);n = a + b;ll comb = nCr(m,m-n);comb = comb * comb % mod * fact[m-n] % mod * fact[n] % mod;int counter = arr[n+1][a][b];if (!counter) counter=1;int result = (counter*comb) % mod;cout << result << endl;}int main() {cin.tie(0) -> sync_with_stdio(0);cout.tie(0);fact[0] = fact[1] = 1;forN(i,2,N) fact[i] = (i)*fact[i-1] % mod;memset(arr, 0, sizeof(arr));arr[1][0][0] = 1;for(int i = 1; i < N; i++) {for(int A = 0; A < i; A++) {for(int B = 0; B < i && B+A < i; B++) {ll f = i-1 - A - B;// a, b, f+1arr[i+1][A][B] = (arr[i+1][A][B] + arr[i][A][B]) % mod;if (!f) continue;// a+1, b, farr[i+1][A+1][B] = (arr[i+1][A+1][B] + f * arr[i][A][B] % mod) % mod;// a, b+1, farr[i+1][A][B+1] = (arr[i+1][A][B+1] + f * arr[i][A][B] % mod) % mod;// a+1, b+1, f-1arr[i+1][A+1][B+1] = (arr[i+1][A+1][B+1] + f*f%mod * arr[i][A][B]%mod) % mod;}}}int t;cin >> t;while(t--) solve();}
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: RUNTIME ERROR
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 |
Test 6
Group: 5
Verdict: RUNTIME ERROR
input |
---|
1000 2000 1107 508 2000 1372 249 2000 588 65 2000 1739 78 ... |
correct output |
---|
750840601 678722180 744501884 159164549 868115056 ... |
user output |
---|
(empty) |