Task: | Kortit II |
Sender: | Laserr |
Submission time: | 2024-10-29 19:16:52 +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 | 0.03 s | 1, 2, 3, 4, 5 | details |
#2 | ACCEPTED | 0.03 s | 2, 3, 4, 5 | details |
#3 | ACCEPTED | 0.04 s | 3, 4, 5 | details |
#4 | ACCEPTED | 0.04 s | 4, 5 | details |
#5 | ACCEPTED | 0.04 s | 5 | details |
#6 | ACCEPTED | 0.04 s | 5 | details |
Compiler report
input/code.cpp: In function 'int main()': input/code.cpp:58:42: warning: suggest parentheses around '&&' within '||' [-Wparentheses] 58 | if (a + b > n || mm == 0 && ma != 0) { | ~~~~~~~~^~~~~~~~~~
Code
#include <iostream>typedef long long ll;using namespace std;const ll mod = 1000000007;ll d[2020][2020];ll f[2020];void construct() {int n = 2000; int k = 2000;for (int i = 2; i <= n; i++) d[i][1] = 1;for (int i = 3; i <= n; i++) {for (int j = 2; j <= k; j++) {d[i][j] = (i - 1) * (d[i - 2][j - 1]) + (i - j) * d[i - 1][j - 1] + j * (d[i - 1][j]);d[i][j] %= mod;}}ll s = 1;for (ll i = 1; i <= k; i++) {s *= i;s %= mod;f[i] = s;}}ll pot(ll x, ll y, ll m) {if (y == 0) return 1 % m;ll u = pot(x, y / 2, m);u = (u * u) % m;if (y % 2 == 1) u = (u * x) % m;return u;}ll binom(ll a, ll b) {return f[a] * pot(f[b] * f[a - b] % mod, mod - 2, mod) % mod;}int main() {construct();int t;cin >> t;while (t) {t--;ll n, a, b;cin >> n >> a >> b;ll mm = (a < b) ? a : b;ll ma = (a > b) ? a : b;if (a + b > n || mm == 0 && ma != 0) {cout << 0 << endl;continue;}ll ans = d[a + b][a];if (ans <= 0) ans = 1;ll p = n - a - b;if (p > 0 && p < n) {ans *= binom(n, p);ans %= mod;}ans *= f[n];ans %= mod;cout << ans << endl;}}
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 ... |