Kortit II

#include <bits/stdc++.h>
 
using namespace std;
 
 
int main() {
    long long n, t, c, a, b, kortit;
    cin >> t;
 
    for (long long index = 0LL; index < t; index++) {
        cin >> kortit >> a >> b;
        long long tasat = kortit - a - b;
        vector<long long> v;
 
        if (tasat < 0LL) cout << 0 << endl; 
        else {
            n = kortit - tasat;
            long long fac = 1LL;
            c = 0LL; 
            if ((a != 0LL and b != 0LL) or n == 0LL) {
                if (a == 0 and b == 0) c = 1LL;
                else {
                    //c
                    vector<vector<long long>> previous = {{1LL}, {2LL,3LL,2LL}, {1LL}}, now;
 
                    for (long long index = 4LL; index < n; index++) {
                        now.push_back({1LL});
                        now.push_back({2LL});
                        long long doubles = 4LL;
                        for (long long d = 1LL; d <= index-3LL; d++) {
                            now[1].push_back(doubles);
                            doubles = doubles*2LL;
                            doubles %= 1000000007LL;
                        }
                        now[1].push_back(doubles - 1LL);
 
                        long long summa = 1;
                        for (long long summai = 0; summai < (long long) previous[1].size(); summai++) {
                            summa += previous[1][summai];
                            summa %= 1000000007LL;
                        }
                        now[1].push_back(summa);
                        //
                        for (long long i = 1LL; i < (index-1LL)/2LL; i++) {
                            long long uusi = (previous[i].back() - previous[i][0] + now[i].back());
                            if (uusi < 0) uusi += 1000000007LL*(previous[i][0]/1000000007LL + 1);
                            uusi %= 1000000007LL;
                            if (uusi < 0)cout << "error" << endl; 
                            now.push_back({uusi});
 
                            for (long long a = 0LL; a < index-1LL; a++) {
                                uusi = -previous[i][a] + previous[i+1][a] + now.back().back();
                                if (uusi < 0) {
                                    uusi += 1000000007LL*(previous[i][a]/1000000007LL + 1);
                                }
                                now[i+1].push_back(uusi % 1000000007LL);
                            }
                        }
                        //reverse
                        if (index % 2LL == 0LL) {
                            v.clear();
                            for (long long t = index-1LL; t >= 0LL; t--) {
                                v.push_back(now[now.size()-1][t]);
                            }
                            now.push_back(v);
                        }
 
                        previous = now;
                        now.clear();
                    }
                    for (int sumi = 0; sumi < (int) previous[min(a, b)-1].size(); sumi++) {
                        c += previous[min(a, b)-1][sumi] ;
                    }
                    c %= 1000000007LL;
                }
                vector<long long> vec;
                for (long long num = 2; num <= tasat; num++) {
                    vec.push_back(num);
                }
                for (long long index = kortit-tasat+1; index <= kortit; index++) {
                    fac *= index;
                    fac %= 1000000007LL;
                    for (long long i = 0LL; i < (long long) vec.size(); i++) {
                        if (fac % vec[i] == 0) {
                            fac /= vec[i];
                            vec.erase(vec.begin() + i);
                            i--;
                        }
                    }
                }
                for (long long index = 2; index <= kortit; index++) {
                    fac *= index;
                    fac %= 1000000007LL;
                }
 
                cout << c*fac % 1000000007LL << endl; 
                if (c*fac < 0 or c < 0) cout << "error" << endl; 
            }
            else cout << 0 << endl; 
        }
    }
}

Test 1

Group: 1, 2, 3, 4, 5

Verdict: ACCEPTED

Test 2

Group: 2, 3, 4, 5

Verdict: ACCEPTED

Test 3

Group: 3, 4, 5

Verdict: ACCEPTED

Test 4

Group: 4, 5

Verdict: WRONG ANSWER

Test 5

Group: 5

Verdict: TIME LIMIT EXCEEDED

Test 6

Group: 5

Verdict: TIME LIMIT EXCEEDED