#include <bits/stdc++.h>
#define pb push_back
#define all(v) ((v).begin(), (v).end())
#define sortv(v) sort(all(v))
#define sz(v) ((int)(v).size())
#define uniqv(v) (v).erase(unique(all(v)), (v).end())
#define umax(a, b) (a)=max((a), (b))
#define umin(a, b) (a)=min((a), (b))
#define FOR(i,a,b) for(int i = (a); i <= (b); i++)
#define rep(i,n) FOR(i,1,n)
#define rep0(i,n) FOR(i,0,(int)(n)-1)
#define FI first
#define SE second
#define INF 2000000000
#define INFLL 1000000000000000000LL
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
const ll DIV = 1000000007;
const int MAX_N = 100000;
int N, K;
ll ans;
ll pac[MAX_N+10];
ll multi(ll x, ll y){
if(y==0) return 1;
if(y==1) return x%DIV;
ll m = multi(x, y/2);
if(y%2){
return m*m%DIV*x%DIV;
}
return m*m%DIV;
}
ll inv(ll x){
return multi(x, DIV-2);
}
int main(){
pac[0] = 1;
for(ll i=1; i<MAX_N+10; i++){
pac[i] = (pac[i-1] * i)%DIV;
}
scanf("%d%d", &N, &K);
K--;
ll t = 1;
for(int i=0; i<=K; i++){
ll add = (t * ((pac[N+1] * inv(pac[N-i+1])%DIV) * inv(pac[i])%DIV * multi(K+1-i, N))) % DIV;
add = (add + DIV)%DIV;
ans = (ans + add) % DIV;
t = -t;
}
cout<<ans;
return 0;
}
Compilation message
asceticism.cpp: In function 'int main()':
asceticism.cpp:51:7: 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 |
3 ms |
1144 KB |
Output is correct |
| 2 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 3 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 4 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 5 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 6 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 7 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 8 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 9 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 10 |
Correct |
3 ms |
1144 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 2 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 3 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 4 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 5 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 6 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 7 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 8 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 9 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 10 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 11 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 12 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 13 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 14 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 15 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 16 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 17 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 18 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 19 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 20 |
Correct |
3 ms |
1020 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 2 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 3 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 4 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 5 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 6 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 7 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 8 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 9 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 10 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 11 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 12 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 13 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 14 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 15 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 16 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 17 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 18 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 19 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 20 |
Correct |
3 ms |
1020 KB |
Output is correct |
| 21 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 22 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 23 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 24 |
Correct |
4 ms |
1144 KB |
Output is correct |
| 25 |
Correct |
4 ms |
1144 KB |
Output is correct |
| 26 |
Correct |
4 ms |
1144 KB |
Output is correct |
| 27 |
Correct |
4 ms |
1144 KB |
Output is correct |
| 28 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 29 |
Correct |
3 ms |
1016 KB |
Output is correct |
| 30 |
Correct |
4 ms |
1144 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 2 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 3 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 4 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 5 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 6 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 7 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 8 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 9 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 10 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 11 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 12 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 13 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 14 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 15 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 16 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 17 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 18 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 19 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 20 |
Correct |
3 ms |
1020 KB |
Output is correct |
| 21 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 22 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 23 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 24 |
Correct |
4 ms |
1144 KB |
Output is correct |
| 25 |
Correct |
4 ms |
1144 KB |
Output is correct |
| 26 |
Correct |
4 ms |
1144 KB |
Output is correct |
| 27 |
Correct |
4 ms |
1144 KB |
Output is correct |
| 28 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 29 |
Correct |
3 ms |
1016 KB |
Output is correct |
| 30 |
Correct |
4 ms |
1144 KB |
Output is correct |
| 31 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 32 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 33 |
Correct |
7 ms |
1272 KB |
Output is correct |
| 34 |
Correct |
15 ms |
1148 KB |
Output is correct |
| 35 |
Correct |
67 ms |
1144 KB |
Output is correct |
| 36 |
Correct |
74 ms |
1144 KB |
Output is correct |
| 37 |
Correct |
81 ms |
1144 KB |
Output is correct |
| 38 |
Correct |
13 ms |
1144 KB |
Output is correct |
| 39 |
Correct |
27 ms |
1144 KB |
Output is correct |
| 40 |
Correct |
34 ms |
1144 KB |
Output is correct |
