Task: | Kortit II |
Sender: | Chenran |
Submission time: | 2024-11-10 17:18:59 +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 | 0.00 s | 1, 2, 3, 4, 5 | details |
#2 | ACCEPTED | 0.00 s | 2, 3, 4, 5 | details |
#3 | ACCEPTED | 0.01 s | 3, 4, 5 | details |
#4 | ACCEPTED | 0.01 s | 4, 5 | details |
#5 | ACCEPTED | 0.11 s | 5 | details |
#6 | ACCEPTED | 0.14 s | 5 | details |
Code
#include <iostream>using namespace std;long long FACT[2001] = {};long long A[2001][2001] = {};long long C[2001][2001] = {};const long long MOD = 1000000007;long long factorial(long long n) {if (FACT[n] != 0) return FACT[n];if (n == 0) return FACT[n] = 1;return FACT[n] = (n * factorial(n - 1)) % MOD;}long long a_function(long long n, long long x) {if (A[n][x] != 0) return A[n][x];if (n == x) return A[n][x] = 0;if (x == 0) return A[n][x] = 1;return A[n][x] = ((x + 1) * a_function(n - 1, x) % MOD + (n - x) * a_function(n - 1, x - 1) % MOD) % MOD;}long long binomal(long long n, long long k) {if (C[n][k] != 0) return C[n][k];if (k == 0 || k == n) return C[n][k] = 1;return C[n][k] = (binomal(n - 1, k) + binomal(n - 1, k - 1)) % MOD;}long long d_function(long long n, long long x) {long long result = 0;for (int i = n; i >= x; i--) {long long a = a_function(i, x);long long b = binomal(n, n - i);result = (result + ((n - i) % 2 == 0 ? (a * b) % MOD : (-(a * b) % MOD + MOD))) % MOD;}return result;}int main() {int t;cin >> t;long long ans[t];int n, a, b;for (int i = 0; i < t; i++) {cin >> n >> a >> b;if ((a + b > n) || (a == 0 && b != 0) || (b == 0 && a != 0)) {ans[i] = 0;continue;}if (a == 0 || b == 0) {ans[i] = factorial(n);continue;}ans[i] = (((d_function(a + b, a) * binomal(n, n - a - b)) % MOD) * factorial(n)) % MOD;}for (int i = 0; i < t; i++) {cout << ans[i] << endl;}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 ... |