Kortit II

#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef vector<int> vi;

#define F first
#define S second
#define PB push_back
#define MP make_pair
#define FOR(i,a,b) for (ll i = a; i < b; i++)

ll pow(ll n) {
    ll f=1;
    FOR(i,1,n+1) {
        f *= i;
    }
    return f;
}


ll bin(ll n, ll k) {
    ll bin = pow(n)/(pow(k)*pow(n-k));
    return bin;
}

ll count(ll n, ll a) {
    vi v;
    ll tc=0, c=0;
    bool no = false;
    FOR(i,0,n) {
        v.push_back(i);
    }
    do {
        FOR(i,0,n) {
            if (v[i]==i) {
                no = true;
                break;
            }
            if (v[i]>i) {
                tc++;
            }
        }
        if (tc==a && !no) {
            c++;
        }
        no = false;
        tc=0;
    } while (next_permutation(v.begin(), v.end()));
    return c;
}

void f() {
    ll n, a, b, t, tm, jm, vm, m=1e9+7;
    cin >> n >> a >> b;
    t = n-a-b;
    tm = bin(n, t);
    jm = pow(n);
    vm = count(n-t, a);
    cout << (tm*jm*vm)%(m) << "\n";
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    int t;
    cin >> t;
    FOR(i,0,t) {
        f();
    }
}

Test 1

Group: 1, 2, 3, 4, 5

Verdict: ACCEPTED

Test 2

Group: 2, 3, 4, 5

Verdict: TIME LIMIT EXCEEDED

Test 3

Group: 3, 4, 5

Verdict: TIME LIMIT EXCEEDED

Test 4

Group: 4, 5

Verdict: TIME LIMIT EXCEEDED

Test 5

Group: 5

Verdict: RUNTIME ERROR

Test 6

Group: 5

Verdict: RUNTIME ERROR