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답안 #225787

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
225787 2020-04-21T15:33:34 Z aloo123 Asceticism (JOI18_asceticism) C++14
100 / 100
 129 ms 2732 KB 
#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define mp make_pair
#define pb push_back
#define vll vector<ll>
#define endl "\n"
#define pll pair<ll,ll>
#define all(x) (x).begin() , (x).end()
#define f first
#define s second
#define pr(x) cout<<x<<endl;
#define pr2(x,y) cout<<x<<" "<<y<<endl;
#define pr3(x,y,z) cout<<x<<" "<<y<<endl;
#define prv(v) for(auto x:v) cout<<x<<" ";
#define ffs fflush(stdout);
#define int ll
using namespace std;
 
const ll N =(2e5+5);
 ll MOD = 1e9+7;
const ll INF = LLONG_MAX;
const ll LOG = 29;
#define PI 3.141592653589793238 
  
double circumference(double r) 
{ 
    double cir = 2.0;
    cir*=PI;
    cir*=r; 
    return cir; 
} 
ll m;
long long binpow(long long a, long long b) {
    a%=MOD;    
    long long res = 1;
    while (b > 0) {
        if (b & 1)
            res = (res * a)%MOD;
        a = (a * a)%MOD;
 
        
        b >>= 1;
    }
    res%=MOD;
    return res;
}
int fac[N]; 
int power(int x, int y, int p) 
{ 
    int res = 1;      // Initialize result 
  
    x = x % p;  // Update x if it is more than or 
                // equal to p 
  
    while (y > 0) 
    { 
        // If y is odd, multiply x with result 
        if (y & 1) 
            res = (res*x) % p; 
  
        // y must be even now 
        y = y>>1; // y = y/2 
        x = (x*x) % p; 
    } 
    return res; 
} 
  
// Returns n^(-1) mod p 
int modInverse(int n, int p) 
{ 
    return power(n, p-2, p); 
} 
  
// Returns nCr % p using Fermat's little 
// theorem. 
void comp(){

    fac[0] = 1; 
    for (int i=1 ; i<N; i++) 
        fac[i] = fac[i-1]*i%MOD; 
}

int nCrModPFermat(int n, int r, int p) 
{ 
   // Base case 
   if (r==0) 
      return 1; 
  
    // Fill factorial array so that we 
    // can find all factorial of r, n 
    // and n-r 
    
  
    return (fac[n]* modInverse(fac[r], p) % p * 
            modInverse(fac[n-r], p) % p) % p; 
} 

void solve(){
    comp();
    ll n,k;
    cin>>n>>k;
    ll ans = 0;
    ll gg[k+1];
    for(ll j = 0;j<=k;j++){
        gg[j] = nCrModPFermat(n+1,j,MOD);
    }
    for(ll j = 0;j<=k;j++){
      //  cout<<gg[j]<<endl;
        ll xd=1;
        
        xd = (xd * binpow(k-j,n))%MOD;
        if(xd<0)xd+=MOD;
        xd = (xd * gg[j])%MOD;
        if(xd<0)xd+=MOD;
        if(j&1)
        ans = (ans - xd)%MOD;
        else
            ans=(ans + xd)%MOD;
        if(ans<0)ans+=MOD;
    }
    cout<<ans<<endl;
       
   


}
 
 
signed main(){
    ios_base::sync_with_stdio(0);
     cin.tie(NULL);
     
    ll t=1;
    while(t--){
        solve();
    }
     
 
 
    
        
}//42364286 418930126
// (3,2)
// (0,0) -> (-1,0) -> (-1,2) -> (3,2)

Subtask #1
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 1920 KB Output is correct
2 Correct 7 ms 1920 KB Output is correct
3 Correct 7 ms 1792 KB Output is correct
4 Correct 7 ms 1920 KB Output is correct
5 Correct 7 ms 1920 KB Output is correct
6 Correct 7 ms 1920 KB Output is correct
7 Correct 7 ms 1920 KB Output is correct
8 Correct 7 ms 1920 KB Output is correct
9 Correct 7 ms 1920 KB Output is correct
10 Correct 7 ms 1920 KB Output is correct

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 1920 KB Output is correct
2 Correct 7 ms 1920 KB Output is correct
3 Correct 7 ms 1792 KB Output is correct
4 Correct 7 ms 1920 KB Output is correct
5 Correct 7 ms 1920 KB Output is correct
6 Correct 7 ms 1920 KB Output is correct
7 Correct 7 ms 1920 KB Output is correct
8 Correct 7 ms 1920 KB Output is correct
9 Correct 7 ms 1920 KB Output is correct
10 Correct 7 ms 1920 KB Output is correct
11 Correct 7 ms 1920 KB Output is correct
12 Correct 7 ms 1920 KB Output is correct
13 Correct 7 ms 1920 KB Output is correct
14 Correct 7 ms 1920 KB Output is correct
15 Correct 7 ms 1920 KB Output is correct
16 Correct 7 ms 1920 KB Output is correct
17 Correct 7 ms 2048 KB Output is correct
18 Correct 7 ms 1920 KB Output is correct
19 Correct 7 ms 1920 KB Output is correct
20 Correct 7 ms 1920 KB Output is correct

Subtask #3
25.0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 1920 KB Output is correct
2 Correct 7 ms 1920 KB Output is correct
3 Correct 7 ms 1792 KB Output is correct
4 Correct 7 ms 1920 KB Output is correct
5 Correct 7 ms 1920 KB Output is correct
6 Correct 7 ms 1920 KB Output is correct
7 Correct 7 ms 1920 KB Output is correct
8 Correct 7 ms 1920 KB Output is correct
9 Correct 7 ms 1920 KB Output is correct
10 Correct 7 ms 1920 KB Output is correct
11 Correct 7 ms 1920 KB Output is correct
12 Correct 7 ms 1920 KB Output is correct
13 Correct 7 ms 1920 KB Output is correct
14 Correct 7 ms 1920 KB Output is correct
15 Correct 7 ms 1920 KB Output is correct
16 Correct 7 ms 1920 KB Output is correct
17 Correct 7 ms 2048 KB Output is correct
18 Correct 7 ms 1920 KB Output is correct
19 Correct 7 ms 1920 KB Output is correct
20 Correct 7 ms 1920 KB Output is correct
21 Correct 7 ms 1920 KB Output is correct
22 Correct 7 ms 1920 KB Output is correct
23 Correct 7 ms 1920 KB Output is correct
24 Correct 7 ms 1920 KB Output is correct
25 Correct 8 ms 1920 KB Output is correct
26 Correct 8 ms 1952 KB Output is correct
27 Correct 8 ms 1920 KB Output is correct
28 Correct 7 ms 1920 KB Output is correct
29 Correct 7 ms 1920 KB Output is correct
30 Correct 8 ms 1920 KB Output is correct

Subtask #4
51.0 / 51.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 1920 KB Output is correct
2 Correct 7 ms 1920 KB Output is correct
3 Correct 7 ms 1792 KB Output is correct
4 Correct 7 ms 1920 KB Output is correct
5 Correct 7 ms 1920 KB Output is correct
6 Correct 7 ms 1920 KB Output is correct
7 Correct 7 ms 1920 KB Output is correct
8 Correct 7 ms 1920 KB Output is correct
9 Correct 7 ms 1920 KB Output is correct
10 Correct 7 ms 1920 KB Output is correct
11 Correct 7 ms 1920 KB Output is correct
12 Correct 7 ms 1920 KB Output is correct
13 Correct 7 ms 1920 KB Output is correct
14 Correct 7 ms 1920 KB Output is correct
15 Correct 7 ms 1920 KB Output is correct
16 Correct 7 ms 1920 KB Output is correct
17 Correct 7 ms 2048 KB Output is correct
18 Correct 7 ms 1920 KB Output is correct
19 Correct 7 ms 1920 KB Output is correct
20 Correct 7 ms 1920 KB Output is correct
21 Correct 7 ms 1920 KB Output is correct
22 Correct 7 ms 1920 KB Output is correct
23 Correct 7 ms 1920 KB Output is correct
24 Correct 7 ms 1920 KB Output is correct
25 Correct 8 ms 1920 KB Output is correct
26 Correct 8 ms 1952 KB Output is correct
27 Correct 8 ms 1920 KB Output is correct
28 Correct 7 ms 1920 KB Output is correct
29 Correct 7 ms 1920 KB Output is correct
30 Correct 8 ms 1920 KB Output is correct
31 Correct 7 ms 1920 KB Output is correct
32 Correct 7 ms 1920 KB Output is correct
33 Correct 13 ms 1952 KB Output is correct
34 Correct 25 ms 2048 KB Output is correct
35 Correct 109 ms 2656 KB Output is correct
36 Correct 120 ms 2732 KB Output is correct
37 Correct 129 ms 2680 KB Output is correct
38 Correct 22 ms 2048 KB Output is correct
39 Correct 44 ms 2168 KB Output is correct
40 Correct 56 ms 2296 KB Output is correct