#include<cstdio>
#include<cstdlib>
#include<iostream>
#include<vector>
#include<queue>
#include<bitset>
#include<string>
#include<stack>
#include<set>
#include<unordered_set>
#include<map>
#include<unordered_map>
#include<cstring>
#include<complex>
#include<cmath>
#include<iomanip>
#include<numeric>
#include<algorithm>
#include<list>
#include<functional>
#include<cassert>
#define mp make_pair
#define pb push_back
#define X first
#define Y second
#define y0 y12
#define y1 y22
#define INF 987654321
#define PI 3.141592653589793238462643383279502884
#define fup(i,a,b,c) for(int (i)=(a);(i)<=(b);(i)+=(c))
#define fdn(i,a,b,c) for(int (i)=(a);(i)>=(b);(i)-=(c))
#define MEM0(a) memset((a),0,sizeof(a));
#define MEM_1(a) memset((a),-1,sizeof(a));
#define ALL(a) a.begin(),a.end()
#define SYNC ios_base::sync_with_stdio(false);cin.tie(0)
using namespace std;
typedef long long ll;
typedef long double ld;
typedef double db;
typedef unsigned int uint;
typedef unsigned long long ull;
typedef pair<int, int> Pi;
typedef pair<ll, ll> Pll;
typedef pair<ld, ld> Pd;
typedef vector<int> Vi;
typedef vector<ll> Vll;
typedef vector<double> Vd;
typedef vector<Pi> VPi;
typedef vector<Pll> VPll;
typedef vector<Pd> VPd;
typedef tuple<int, int, int> iii;
typedef tuple<int,int,int,int> iiii;
typedef tuple<ll, ll, ll> LLL;
typedef vector<iii> Viii;
typedef vector<LLL> VLLL;
typedef complex<double> base;
const ll MOD = 1000000007;
ll POW(ll a, ll b, ll MMM = MOD) {ll ret=1; for(;b;b>>=1,a=(a*a)%MMM)if(b&1)ret=(ret*a)% MMM; return ret; }
ll gcd(ll a, ll b) { return b ? gcd(b, a%b) : a; }
ll lcm(ll a, ll b) { if (a == 0 || b == 0)return a + b; return a*(b / gcd(a, b)); }
int dx[] = { 0,1,0,-1,1,1,-1,-1 }, dy[] = { 1,0,-1,0,1,-1,1,-1 };
ll d[3001][3001];
int n,k;
ll go(int N,int K)
{
if(K==1 || K==N)return 1;
ll &ret=d[N][K];
if(~ret)return ret;
return ret=(go(N-1,K)*K+go(N-1,K-1)*(N-K+1))%MOD;
}
int main() {
MEM_1(d);
scanf("%d%d",&n,&k);
printf("%lld",go(n,k));
}
Compilation message
asceticism.cpp: In function 'int main()':
asceticism.cpp:74:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d",&n,&k);
~~~~~^~~~~~~~~~~~~~
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
60 ms |
70904 KB |
Output is correct |
| 2 |
Correct |
60 ms |
70776 KB |
Output is correct |
| 3 |
Correct |
60 ms |
70776 KB |
Output is correct |
| 4 |
Correct |
59 ms |
70904 KB |
Output is correct |
| 5 |
Correct |
60 ms |
70776 KB |
Output is correct |
| 6 |
Correct |
60 ms |
70876 KB |
Output is correct |
| 7 |
Correct |
59 ms |
70892 KB |
Output is correct |
| 8 |
Correct |
60 ms |
70748 KB |
Output is correct |
| 9 |
Correct |
70 ms |
70780 KB |
Output is correct |
| 10 |
Correct |
60 ms |
70776 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
60 ms |
70904 KB |
Output is correct |
| 2 |
Correct |
60 ms |
70776 KB |
Output is correct |
| 3 |
Correct |
60 ms |
70776 KB |
Output is correct |
| 4 |
Correct |
59 ms |
70904 KB |
Output is correct |
| 5 |
Correct |
60 ms |
70776 KB |
Output is correct |
| 6 |
Correct |
60 ms |
70876 KB |
Output is correct |
| 7 |
Correct |
59 ms |
70892 KB |
Output is correct |
| 8 |
Correct |
60 ms |
70748 KB |
Output is correct |
| 9 |
Correct |
70 ms |
70780 KB |
Output is correct |
| 10 |
Correct |
60 ms |
70776 KB |
Output is correct |
| 11 |
Correct |
59 ms |
70776 KB |
Output is correct |
| 12 |
Correct |
60 ms |
70772 KB |
Output is correct |
| 13 |
Correct |
59 ms |
70880 KB |
Output is correct |
| 14 |
Correct |
62 ms |
70776 KB |
Output is correct |
| 15 |
Correct |
60 ms |
70776 KB |
Output is correct |
| 16 |
Correct |
59 ms |
70828 KB |
Output is correct |
| 17 |
Correct |
60 ms |
70788 KB |
Output is correct |
| 18 |
Correct |
60 ms |
70900 KB |
Output is correct |
| 19 |
Correct |
59 ms |
70748 KB |
Output is correct |
| 20 |
Correct |
59 ms |
70944 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
60 ms |
70904 KB |
Output is correct |
| 2 |
Correct |
60 ms |
70776 KB |
Output is correct |
| 3 |
Correct |
60 ms |
70776 KB |
Output is correct |
| 4 |
Correct |
59 ms |
70904 KB |
Output is correct |
| 5 |
Correct |
60 ms |
70776 KB |
Output is correct |
| 6 |
Correct |
60 ms |
70876 KB |
Output is correct |
| 7 |
Correct |
59 ms |
70892 KB |
Output is correct |
| 8 |
Correct |
60 ms |
70748 KB |
Output is correct |
| 9 |
Correct |
70 ms |
70780 KB |
Output is correct |
| 10 |
Correct |
60 ms |
70776 KB |
Output is correct |
| 11 |
Correct |
59 ms |
70776 KB |
Output is correct |
| 12 |
Correct |
60 ms |
70772 KB |
Output is correct |
| 13 |
Correct |
59 ms |
70880 KB |
Output is correct |
| 14 |
Correct |
62 ms |
70776 KB |
Output is correct |
| 15 |
Correct |
60 ms |
70776 KB |
Output is correct |
| 16 |
Correct |
59 ms |
70828 KB |
Output is correct |
| 17 |
Correct |
60 ms |
70788 KB |
Output is correct |
| 18 |
Correct |
60 ms |
70900 KB |
Output is correct |
| 19 |
Correct |
59 ms |
70748 KB |
Output is correct |
| 20 |
Correct |
59 ms |
70944 KB |
Output is correct |
| 21 |
Correct |
67 ms |
70860 KB |
Output is correct |
| 22 |
Correct |
60 ms |
70816 KB |
Output is correct |
| 23 |
Correct |
67 ms |
70888 KB |
Output is correct |
| 24 |
Correct |
67 ms |
70904 KB |
Output is correct |
| 25 |
Correct |
66 ms |
70776 KB |
Output is correct |
| 26 |
Correct |
60 ms |
70904 KB |
Output is correct |
| 27 |
Correct |
59 ms |
70784 KB |
Output is correct |
| 28 |
Correct |
61 ms |
70908 KB |
Output is correct |
| 29 |
Correct |
60 ms |
70796 KB |
Output is correct |
| 30 |
Correct |
61 ms |
70904 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
60 ms |
70904 KB |
Output is correct |
| 2 |
Correct |
60 ms |
70776 KB |
Output is correct |
| 3 |
Correct |
60 ms |
70776 KB |
Output is correct |
| 4 |
Correct |
59 ms |
70904 KB |
Output is correct |
| 5 |
Correct |
60 ms |
70776 KB |
Output is correct |
| 6 |
Correct |
60 ms |
70876 KB |
Output is correct |
| 7 |
Correct |
59 ms |
70892 KB |
Output is correct |
| 8 |
Correct |
60 ms |
70748 KB |
Output is correct |
| 9 |
Correct |
70 ms |
70780 KB |
Output is correct |
| 10 |
Correct |
60 ms |
70776 KB |
Output is correct |
| 11 |
Correct |
59 ms |
70776 KB |
Output is correct |
| 12 |
Correct |
60 ms |
70772 KB |
Output is correct |
| 13 |
Correct |
59 ms |
70880 KB |
Output is correct |
| 14 |
Correct |
62 ms |
70776 KB |
Output is correct |
| 15 |
Correct |
60 ms |
70776 KB |
Output is correct |
| 16 |
Correct |
59 ms |
70828 KB |
Output is correct |
| 17 |
Correct |
60 ms |
70788 KB |
Output is correct |
| 18 |
Correct |
60 ms |
70900 KB |
Output is correct |
| 19 |
Correct |
59 ms |
70748 KB |
Output is correct |
| 20 |
Correct |
59 ms |
70944 KB |
Output is correct |
| 21 |
Correct |
67 ms |
70860 KB |
Output is correct |
| 22 |
Correct |
60 ms |
70816 KB |
Output is correct |
| 23 |
Correct |
67 ms |
70888 KB |
Output is correct |
| 24 |
Correct |
67 ms |
70904 KB |
Output is correct |
| 25 |
Correct |
66 ms |
70776 KB |
Output is correct |
| 26 |
Correct |
60 ms |
70904 KB |
Output is correct |
| 27 |
Correct |
59 ms |
70784 KB |
Output is correct |
| 28 |
Correct |
61 ms |
70908 KB |
Output is correct |
| 29 |
Correct |
60 ms |
70796 KB |
Output is correct |
| 30 |
Correct |
61 ms |
70904 KB |
Output is correct |
| 31 |
Correct |
60 ms |
70812 KB |
Output is correct |
| 32 |
Runtime error |
159 ms |
143124 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 33 |
Halted |
0 ms |
0 KB |
- |
