oj.uz

Submission #44049

# Submission time Handle Problem Language Result Execution time Memory
44049 2018-03-29T12:57:05 Z wxh010910 Asceticism (JOI18_asceticism) C++17
100 / 100
 14 ms 1408 KB 
#include <bits/stdc++.h>

using namespace std;

#define X first
#define Y second
#define mp make_pair
#define pb push_back
#define Debug(...) fprintf(stderr, __VA_ARGS__)

typedef long long LL;
typedef long double LD;
typedef unsigned int uint;
typedef pair <int, int> pii;
typedef unsigned long long uLL;

template <typename T> inline void Read(T &x) {
  char c = getchar();
  bool f = false;
  for (x = 0; !isdigit(c); c = getchar()) {
    if (c == '-') {
      f = true;
    }
  }
  for (; isdigit(c); c = getchar()) {
    x = x * 10 + c - '0';
  }
  if (f) {
    x = -x;
  }
}

template <typename T> inline bool CheckMax(T &a, const T &b) {
  return a < b ? a = b, true : false;
}

template <typename T> inline bool CheckMin(T &a, const T &b) {
  return a > b ? a = b, true : false;
}

const int N = 100005;
const int mod = 1e9 + 7;

int n, m, ans, fac[N], inv[N];

inline int Qow(int x, int y) {
  int r = 1;
  for (; y; y >>= 1, x = 1LL * x * x % mod) {
    if (y & 1) {
      r = 1LL * r * x % mod;
    }
  }
  return r;
}

inline int C(int x, int y) {
  return 1LL * fac[x] * inv[y] % mod * inv[x - y] % mod;
}

int main() {
#ifdef wxh010910
  freopen("d.in", "r", stdin);
#endif
  Read(n), Read(m), fac[0] = fac[1] = inv[0] = inv[1] = 1;
  for (int i = 2; i <= n + 1; ++i) {
    fac[i] = 1LL * fac[i - 1] * i % mod;
    inv[i] = 1LL * (mod - mod / i) * inv[mod % i] % mod;
  }
  for (int i = 2; i <= n + 1; ++i) {
    inv[i] = 1LL * inv[i - 1] * inv[i] % mod;
  }
  for (int i = 0; i <= m; ++i) {
    if (i & 1) {
      ans = (ans - 1LL * C(n + 1, i) * Qow(m - i, n) % mod + mod) % mod;
    } else {
      ans = (1LL * C(n + 1, i) * Qow(m - i, n) + ans) % mod;
    }
  }
  printf("%d\n", ans);
#ifdef wxh010910
  Debug("My Time: %.3lfms\n", (double)clock() / CLOCKS_PER_SEC);
#endif
  return 0;
}

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 492 KB Output is correct
3 Correct 2 ms 492 KB Output is correct
4 Correct 2 ms 492 KB Output is correct
5 Correct 2 ms 492 KB Output is correct
6 Correct 2 ms 624 KB Output is correct
7 Correct 2 ms 624 KB Output is correct
8 Correct 2 ms 624 KB Output is correct
9 Correct 2 ms 624 KB Output is correct
10 Correct 2 ms 624 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 492 KB Output is correct
3 Correct 2 ms 492 KB Output is correct
4 Correct 2 ms 492 KB Output is correct
5 Correct 2 ms 492 KB Output is correct
6 Correct 2 ms 624 KB Output is correct
7 Correct 2 ms 624 KB Output is correct
8 Correct 2 ms 624 KB Output is correct
9 Correct 2 ms 624 KB Output is correct
10 Correct 2 ms 624 KB Output is correct
11 Correct 2 ms 624 KB Output is correct
12 Correct 2 ms 624 KB Output is correct
13 Correct 2 ms 624 KB Output is correct
14 Correct 2 ms 752 KB Output is correct
15 Correct 2 ms 752 KB Output is correct
16 Correct 2 ms 752 KB Output is correct
17 Correct 2 ms 752 KB Output is correct
18 Correct 2 ms 752 KB Output is correct
19 Correct 2 ms 752 KB Output is correct
20 Correct 2 ms 752 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 492 KB Output is correct
3 Correct 2 ms 492 KB Output is correct
4 Correct 2 ms 492 KB Output is correct
5 Correct 2 ms 492 KB Output is correct
6 Correct 2 ms 624 KB Output is correct
7 Correct 2 ms 624 KB Output is correct
8 Correct 2 ms 624 KB Output is correct
9 Correct 2 ms 624 KB Output is correct
10 Correct 2 ms 624 KB Output is correct
11 Correct 2 ms 624 KB Output is correct
12 Correct 2 ms 624 KB Output is correct
13 Correct 2 ms 624 KB Output is correct
14 Correct 2 ms 752 KB Output is correct
15 Correct 2 ms 752 KB Output is correct
16 Correct 2 ms 752 KB Output is correct
17 Correct 2 ms 752 KB Output is correct
18 Correct 2 ms 752 KB Output is correct
19 Correct 2 ms 752 KB Output is correct
20 Correct 2 ms 752 KB Output is correct
21 Correct 2 ms 752 KB Output is correct
22 Correct 2 ms 752 KB Output is correct
23 Correct 2 ms 752 KB Output is correct
24 Correct 2 ms 752 KB Output is correct
25 Correct 2 ms 752 KB Output is correct
26 Correct 2 ms 752 KB Output is correct
27 Correct 2 ms 752 KB Output is correct
28 Correct 2 ms 752 KB Output is correct
29 Correct 2 ms 752 KB Output is correct
30 Correct 2 ms 752 KB Output is correct

Subtask #4
51.0 / 51.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 492 KB Output is correct
3 Correct 2 ms 492 KB Output is correct
4 Correct 2 ms 492 KB Output is correct
5 Correct 2 ms 492 KB Output is correct
6 Correct 2 ms 624 KB Output is correct
7 Correct 2 ms 624 KB Output is correct
8 Correct 2 ms 624 KB Output is correct
9 Correct 2 ms 624 KB Output is correct
10 Correct 2 ms 624 KB Output is correct
11 Correct 2 ms 624 KB Output is correct
12 Correct 2 ms 624 KB Output is correct
13 Correct 2 ms 624 KB Output is correct
14 Correct 2 ms 752 KB Output is correct
15 Correct 2 ms 752 KB Output is correct
16 Correct 2 ms 752 KB Output is correct
17 Correct 2 ms 752 KB Output is correct
18 Correct 2 ms 752 KB Output is correct
19 Correct 2 ms 752 KB Output is correct
20 Correct 2 ms 752 KB Output is correct
21 Correct 2 ms 752 KB Output is correct
22 Correct 2 ms 752 KB Output is correct
23 Correct 2 ms 752 KB Output is correct
24 Correct 2 ms 752 KB Output is correct
25 Correct 2 ms 752 KB Output is correct
26 Correct 2 ms 752 KB Output is correct
27 Correct 2 ms 752 KB Output is correct
28 Correct 2 ms 752 KB Output is correct
29 Correct 2 ms 752 KB Output is correct
30 Correct 2 ms 752 KB Output is correct
31 Correct 4 ms 1408 KB Output is correct
32 Correct 4 ms 1408 KB Output is correct
33 Correct 5 ms 1408 KB Output is correct
34 Correct 7 ms 1408 KB Output is correct
35 Correct 14 ms 1408 KB Output is correct
36 Correct 14 ms 1408 KB Output is correct
37 Correct 14 ms 1408 KB Output is correct
38 Correct 3 ms 1408 KB Output is correct
39 Correct 7 ms 1408 KB Output is correct
40 Correct 9 ms 1408 KB Output is correct