#include <bits/stdc++.h>
using namespace std;
using tint = long long;
using ld = long double;
#define forsn(i, s, n) for(int i = s; i < int(n); i++)
#define forn(i, n) forsn(i, 0, n)
#define trav(a, x) for(auto& a : x)
using vi = vector<int>;
using vl = vector<tint>;
using vb = vector<bool>;
#define pb push_back
#define pf push_front
#define rsz resize
#define all(x) begin(x), end(x)
#define rall(x) x.rbegin(), x.rend()
#define sz(x) (int)(x).size()
#define ins insert
#define esta(x,c) ((c).find(x) != (c).end())
using pi = pair<int,int>;
using pl = pair<tint,tint>;
#define f first
#define s second
#define mp make_pair
#define DBG(x) cerr << #x << " = " << x << endl;
const int MOD = 1e9+7;
const tint mod = 998244353;
const int MX = 2e5+5;
const tint INF = 1e18;
const int inf = 2e9;
const ld PI = acos(ld(-1));
const ld eps = 1e-8;
const int dx[4] = {1, -1, 0, 0};
const int dy[4] = {0, 0, 1, -1};
template<class T> void remDup(vector<T> &v){
sort(all(v)); v.erase(unique(all(v)),end(v));
}
bool valid(int x, int y, int n, int m){
return (0<=x && x<n && 0<=y && y<m);
}
int cdiv(int a, int b) { return a/b+((a^b)>0&&a%b); } //redondea p arriba
int fdiv(int a, int b) { return a/b-((a^b)<0&&a%b); } //redonde p abajo
void NACHO(string name = "cardgame"){
ios_base::sync_with_stdio(0); cin.tie(0);
// freopen((name+".in").c_str(), "r", stdin);
// freopen((name+".out").c_str(), "w", stdout);
}
tint A[3001][3002];
int main(){
NACHO();
int n, k; cin >> n >> k;
forn(i, n+1) A[i][0] = 1;
forsn(i, 1, n+1){
forsn(j, 1, k+2){
A[i][j] = A[i-1][j]*(j+1) % MOD+A[i-1][j-1]*(i-j) % MOD;
A[i][j] = ((A[i][j] % MOD)+MOD)%MOD;
}
}
cout << A[n][k-1] << "\n";
}
//OVERFLOW!
//COTAS?
//CHEQUEA LAS CUENTAS
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
364 KB |
Output is correct |
2 |
Correct |
1 ms |
364 KB |
Output is correct |
3 |
Correct |
1 ms |
364 KB |
Output is correct |
4 |
Correct |
1 ms |
364 KB |
Output is correct |
5 |
Correct |
1 ms |
364 KB |
Output is correct |
6 |
Correct |
1 ms |
364 KB |
Output is correct |
7 |
Correct |
1 ms |
364 KB |
Output is correct |
8 |
Correct |
1 ms |
368 KB |
Output is correct |
9 |
Correct |
1 ms |
364 KB |
Output is correct |
10 |
Correct |
1 ms |
384 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
364 KB |
Output is correct |
2 |
Correct |
1 ms |
364 KB |
Output is correct |
3 |
Correct |
1 ms |
364 KB |
Output is correct |
4 |
Correct |
1 ms |
364 KB |
Output is correct |
5 |
Correct |
1 ms |
364 KB |
Output is correct |
6 |
Correct |
1 ms |
364 KB |
Output is correct |
7 |
Correct |
1 ms |
364 KB |
Output is correct |
8 |
Correct |
1 ms |
368 KB |
Output is correct |
9 |
Correct |
1 ms |
364 KB |
Output is correct |
10 |
Correct |
1 ms |
384 KB |
Output is correct |
11 |
Correct |
1 ms |
748 KB |
Output is correct |
12 |
Correct |
1 ms |
1516 KB |
Output is correct |
13 |
Correct |
1 ms |
1516 KB |
Output is correct |
14 |
Correct |
2 ms |
1900 KB |
Output is correct |
15 |
Correct |
3 ms |
2284 KB |
Output is correct |
16 |
Correct |
2 ms |
2284 KB |
Output is correct |
17 |
Correct |
1 ms |
1132 KB |
Output is correct |
18 |
Correct |
1 ms |
1644 KB |
Output is correct |
19 |
Correct |
1 ms |
1004 KB |
Output is correct |
20 |
Correct |
1 ms |
364 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
364 KB |
Output is correct |
2 |
Correct |
1 ms |
364 KB |
Output is correct |
3 |
Correct |
1 ms |
364 KB |
Output is correct |
4 |
Correct |
1 ms |
364 KB |
Output is correct |
5 |
Correct |
1 ms |
364 KB |
Output is correct |
6 |
Correct |
1 ms |
364 KB |
Output is correct |
7 |
Correct |
1 ms |
364 KB |
Output is correct |
8 |
Correct |
1 ms |
368 KB |
Output is correct |
9 |
Correct |
1 ms |
364 KB |
Output is correct |
10 |
Correct |
1 ms |
384 KB |
Output is correct |
11 |
Correct |
1 ms |
748 KB |
Output is correct |
12 |
Correct |
1 ms |
1516 KB |
Output is correct |
13 |
Correct |
1 ms |
1516 KB |
Output is correct |
14 |
Correct |
2 ms |
1900 KB |
Output is correct |
15 |
Correct |
3 ms |
2284 KB |
Output is correct |
16 |
Correct |
2 ms |
2284 KB |
Output is correct |
17 |
Correct |
1 ms |
1132 KB |
Output is correct |
18 |
Correct |
1 ms |
1644 KB |
Output is correct |
19 |
Correct |
1 ms |
1004 KB |
Output is correct |
20 |
Correct |
1 ms |
364 KB |
Output is correct |
21 |
Correct |
3 ms |
4460 KB |
Output is correct |
22 |
Correct |
3 ms |
4460 KB |
Output is correct |
23 |
Correct |
8 ms |
7936 KB |
Output is correct |
24 |
Correct |
8 ms |
8300 KB |
Output is correct |
25 |
Correct |
14 ms |
11884 KB |
Output is correct |
26 |
Correct |
14 ms |
12140 KB |
Output is correct |
27 |
Correct |
14 ms |
12140 KB |
Output is correct |
28 |
Correct |
5 ms |
5356 KB |
Output is correct |
29 |
Correct |
1 ms |
1280 KB |
Output is correct |
30 |
Correct |
14 ms |
11884 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
364 KB |
Output is correct |
2 |
Correct |
1 ms |
364 KB |
Output is correct |
3 |
Correct |
1 ms |
364 KB |
Output is correct |
4 |
Correct |
1 ms |
364 KB |
Output is correct |
5 |
Correct |
1 ms |
364 KB |
Output is correct |
6 |
Correct |
1 ms |
364 KB |
Output is correct |
7 |
Correct |
1 ms |
364 KB |
Output is correct |
8 |
Correct |
1 ms |
368 KB |
Output is correct |
9 |
Correct |
1 ms |
364 KB |
Output is correct |
10 |
Correct |
1 ms |
384 KB |
Output is correct |
11 |
Correct |
1 ms |
748 KB |
Output is correct |
12 |
Correct |
1 ms |
1516 KB |
Output is correct |
13 |
Correct |
1 ms |
1516 KB |
Output is correct |
14 |
Correct |
2 ms |
1900 KB |
Output is correct |
15 |
Correct |
3 ms |
2284 KB |
Output is correct |
16 |
Correct |
2 ms |
2284 KB |
Output is correct |
17 |
Correct |
1 ms |
1132 KB |
Output is correct |
18 |
Correct |
1 ms |
1644 KB |
Output is correct |
19 |
Correct |
1 ms |
1004 KB |
Output is correct |
20 |
Correct |
1 ms |
364 KB |
Output is correct |
21 |
Correct |
3 ms |
4460 KB |
Output is correct |
22 |
Correct |
3 ms |
4460 KB |
Output is correct |
23 |
Correct |
8 ms |
7936 KB |
Output is correct |
24 |
Correct |
8 ms |
8300 KB |
Output is correct |
25 |
Correct |
14 ms |
11884 KB |
Output is correct |
26 |
Correct |
14 ms |
12140 KB |
Output is correct |
27 |
Correct |
14 ms |
12140 KB |
Output is correct |
28 |
Correct |
5 ms |
5356 KB |
Output is correct |
29 |
Correct |
1 ms |
1280 KB |
Output is correct |
30 |
Correct |
14 ms |
11884 KB |
Output is correct |
31 |
Runtime error |
54 ms |
25252 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
32 |
Halted |
0 ms |
0 KB |
- |