oj.uz

답안 #530518

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
530518 2022-02-25T16:00:00 Z Killer2501 Asceticism (JOI18_asceticism) C++14
100 / 100
 12 ms 6604 KB 
#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define ull unsigned long long
#define pb push_back
#define pll pair<ll, ll>
#define pii pair<int, int>
#define fi first
#define se second
using namespace std;
const int N = 1e5+5;
const int M = 1e2+2;
const int mod = 1e9+7;
const ll base = 75;
const int inf = 1e9;
int m, n, t, b[N], d[N], lab[N], q;
int k, a[N], dp[N];
ll ans, tong;
vector<int> adj[N];
vector<pii> vi;
string s[N];
bool vis[N];
ll pw(ll k, ll n)
{
    ll total = 1;
    for(; n; n >>= 1)
    {
        if(n&1)total = total * k % mod;
        k = k * k % mod;
    }
    return total;
}
void add(int &x, int y)
{
    x += y;
    if(x >= mod)x -= mod;
}
int findp(int u)
{
    return lab[u] < 0 ? u : lab[u] = findp(lab[u]);
}
void hop(int u, int v)
{
    u = findp(u);
    v = findp(v);
    if(u == v)return;
    if(lab[u] > lab[v])swap(u, v);
    lab[u] += lab[v];
    lab[v] = u;
}
int C(int u, int v)
{
    if(u > v)return 0;
    return 1ll * a[v] * b[u] % mod * b[v-u] % mod;
}
void sol()
{
    cin >> n >> k;
    a[0] = b[0] = 1;
    for(int i = 1; i <= n+1; i ++)
        a[i] = 1ll * a[i-1] * i % mod;
    b[n+1] = pw(a[n+1], mod-2);
    for(int i = n; i > 0; i --)b[i] = 1ll * b[i+1] * (i+1) % mod;
    for(int i = 0; i <= k; i ++)
    {
        tong = 1ll*pw(k-i, n) * C(i, n+1) % mod;
        if(i&1)ans = (ans -  tong + mod) % mod;
        else ans = (ans + tong) % mod;
        //cout << i <<" "<<tong<<'\n';
    }
    cout << ans;
}
int main()
{
    cin.tie(0);
    cout.tie(0);
    ios_base::sync_with_stdio(0);
    #define task "test"
    if(fopen(task".inp", "r"))
	{
		freopen(task".inp", "r", stdin);
		freopen(task".out", "w", stdout);
	}
    int test = 1;
    //cin >> test;
    while(test -- > 0)sol();
    return 0;
}

Compilation message

asceticism.cpp: In function 'int main()':
asceticism.cpp:81:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   81 |   freopen(task".inp", "r", stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
asceticism.cpp:82:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   82 |   freopen(task".out", "w", stdout);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5808 KB Output is correct
2 Correct 3 ms 5708 KB Output is correct
3 Correct 5 ms 5708 KB Output is correct
4 Correct 4 ms 5708 KB Output is correct
5 Correct 3 ms 5708 KB Output is correct
6 Correct 4 ms 5708 KB Output is correct
7 Correct 3 ms 5808 KB Output is correct
8 Correct 3 ms 5708 KB Output is correct
9 Correct 3 ms 5708 KB Output is correct
10 Correct 3 ms 5708 KB Output is correct

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5808 KB Output is correct
2 Correct 3 ms 5708 KB Output is correct
3 Correct 5 ms 5708 KB Output is correct
4 Correct 4 ms 5708 KB Output is correct
5 Correct 3 ms 5708 KB Output is correct
6 Correct 4 ms 5708 KB Output is correct
7 Correct 3 ms 5808 KB Output is correct
8 Correct 3 ms 5708 KB Output is correct
9 Correct 3 ms 5708 KB Output is correct
10 Correct 3 ms 5708 KB Output is correct
11 Correct 3 ms 5812 KB Output is correct
12 Correct 3 ms 5708 KB Output is correct
13 Correct 3 ms 5708 KB Output is correct
14 Correct 3 ms 5708 KB Output is correct
15 Correct 5 ms 5708 KB Output is correct
16 Correct 3 ms 5708 KB Output is correct
17 Correct 3 ms 5708 KB Output is correct
18 Correct 4 ms 5708 KB Output is correct
19 Correct 4 ms 5708 KB Output is correct
20 Correct 3 ms 5708 KB Output is correct

Subtask #3
25.0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5808 KB Output is correct
2 Correct 3 ms 5708 KB Output is correct
3 Correct 5 ms 5708 KB Output is correct
4 Correct 4 ms 5708 KB Output is correct
5 Correct 3 ms 5708 KB Output is correct
6 Correct 4 ms 5708 KB Output is correct
7 Correct 3 ms 5808 KB Output is correct
8 Correct 3 ms 5708 KB Output is correct
9 Correct 3 ms 5708 KB Output is correct
10 Correct 3 ms 5708 KB Output is correct
11 Correct 3 ms 5812 KB Output is correct
12 Correct 3 ms 5708 KB Output is correct
13 Correct 3 ms 5708 KB Output is correct
14 Correct 3 ms 5708 KB Output is correct
15 Correct 5 ms 5708 KB Output is correct
16 Correct 3 ms 5708 KB Output is correct
17 Correct 3 ms 5708 KB Output is correct
18 Correct 4 ms 5708 KB Output is correct
19 Correct 4 ms 5708 KB Output is correct
20 Correct 3 ms 5708 KB Output is correct
21 Correct 3 ms 5708 KB Output is correct
22 Correct 3 ms 5808 KB Output is correct
23 Correct 4 ms 5816 KB Output is correct
24 Correct 4 ms 5808 KB Output is correct
25 Correct 3 ms 5804 KB Output is correct
26 Correct 4 ms 5808 KB Output is correct
27 Correct 3 ms 5708 KB Output is correct
28 Correct 4 ms 5808 KB Output is correct
29 Correct 4 ms 5708 KB Output is correct
30 Correct 5 ms 5804 KB Output is correct

Subtask #4
51.0 / 51.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5808 KB Output is correct
2 Correct 3 ms 5708 KB Output is correct
3 Correct 5 ms 5708 KB Output is correct
4 Correct 4 ms 5708 KB Output is correct
5 Correct 3 ms 5708 KB Output is correct
6 Correct 4 ms 5708 KB Output is correct
7 Correct 3 ms 5808 KB Output is correct
8 Correct 3 ms 5708 KB Output is correct
9 Correct 3 ms 5708 KB Output is correct
10 Correct 3 ms 5708 KB Output is correct
11 Correct 3 ms 5812 KB Output is correct
12 Correct 3 ms 5708 KB Output is correct
13 Correct 3 ms 5708 KB Output is correct
14 Correct 3 ms 5708 KB Output is correct
15 Correct 5 ms 5708 KB Output is correct
16 Correct 3 ms 5708 KB Output is correct
17 Correct 3 ms 5708 KB Output is correct
18 Correct 4 ms 5708 KB Output is correct
19 Correct 4 ms 5708 KB Output is correct
20 Correct 3 ms 5708 KB Output is correct
21 Correct 3 ms 5708 KB Output is correct
22 Correct 3 ms 5808 KB Output is correct
23 Correct 4 ms 5816 KB Output is correct
24 Correct 4 ms 5808 KB Output is correct
25 Correct 3 ms 5804 KB Output is correct
26 Correct 4 ms 5808 KB Output is correct
27 Correct 3 ms 5708 KB Output is correct
28 Correct 4 ms 5808 KB Output is correct
29 Correct 4 ms 5708 KB Output is correct
30 Correct 5 ms 5804 KB Output is correct
31 Correct 5 ms 6580 KB Output is correct
32 Correct 6 ms 6580 KB Output is correct
33 Correct 5 ms 6476 KB Output is correct
34 Correct 6 ms 6476 KB Output is correct
35 Correct 12 ms 6576 KB Output is correct
36 Correct 12 ms 6476 KB Output is correct
37 Correct 12 ms 6596 KB Output is correct
38 Correct 5 ms 5836 KB Output is correct
39 Correct 7 ms 6384 KB Output is correct
40 Correct 8 ms 6604 KB Output is correct