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Submission #47476

# Submission time Handle Problem Language Result Execution time Memory
47476 2018-05-03T14:09:16 Z Talant Asceticism (JOI18_asceticism) C++17
100 / 100
 51 ms 1488 KB 
#include <bits/stdc++.h>

#define mk make_pair
#define sc second
#define fr first
#define pb emplace_back
#define all(s) s.begin(), s.end()
#define sz(s) ( (int)s.size() )
#define int long long

using namespace std;

const int inf = (int)1e9 + 7;
const int N = (int)1e5 + 7;

int n,m;
int f[N];
int ans;

int binpow (int a,int b) {
      int res = 1;
      while (b) {
            if (b & 1)
                  res *= a;
            a *= a;
            b >>= 1;
            a %= inf;
            res %= inf;
      }
      return (res % inf);
}
int cnk(int n,int k) {
      return ((f[n] * binpow(f[n - k],inf - 2)) % inf * binpow(f[k],inf - 2) % inf);
}
int fun(int k) {
      return ((cnk(n + 1,k) * binpow(m - k,n)) % inf);
}
main() {
      f[0] = 1;
      for (int i = 1; i <= N - 5; i ++)
            f[i] = (f[i - 1] * i) % inf;

      cin >> n >> m;

      for (int i = 0; i <= m; i ++) {
            if (i & 1)
                  ans = (ans + inf - fun(i)) % inf;
            else
                  ans = (ans + fun(i)) % inf;
      }
      cout << ans << endl;
}

Compilation message

asceticism.cpp:38:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main() {
      ^

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 1144 KB Output is correct
2 Correct 3 ms 1144 KB Output is correct
3 Correct 3 ms 1196 KB Output is correct
4 Correct 3 ms 1248 KB Output is correct
5 Correct 3 ms 1248 KB Output is correct
6 Correct 3 ms 1248 KB Output is correct
7 Correct 3 ms 1280 KB Output is correct
8 Correct 3 ms 1280 KB Output is correct
9 Correct 3 ms 1280 KB Output is correct
10 Correct 3 ms 1280 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 1144 KB Output is correct
2 Correct 3 ms 1144 KB Output is correct
3 Correct 3 ms 1196 KB Output is correct
4 Correct 3 ms 1248 KB Output is correct
5 Correct 3 ms 1248 KB Output is correct
6 Correct 3 ms 1248 KB Output is correct
7 Correct 3 ms 1280 KB Output is correct
8 Correct 3 ms 1280 KB Output is correct
9 Correct 3 ms 1280 KB Output is correct
10 Correct 3 ms 1280 KB Output is correct
11 Correct 3 ms 1280 KB Output is correct
12 Correct 3 ms 1288 KB Output is correct
13 Correct 3 ms 1408 KB Output is correct
14 Correct 3 ms 1408 KB Output is correct
15 Correct 3 ms 1408 KB Output is correct
16 Correct 4 ms 1460 KB Output is correct
17 Correct 3 ms 1460 KB Output is correct
18 Correct 3 ms 1460 KB Output is correct
19 Correct 3 ms 1460 KB Output is correct
20 Correct 3 ms 1460 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 1144 KB Output is correct
2 Correct 3 ms 1144 KB Output is correct
3 Correct 3 ms 1196 KB Output is correct
4 Correct 3 ms 1248 KB Output is correct
5 Correct 3 ms 1248 KB Output is correct
6 Correct 3 ms 1248 KB Output is correct
7 Correct 3 ms 1280 KB Output is correct
8 Correct 3 ms 1280 KB Output is correct
9 Correct 3 ms 1280 KB Output is correct
10 Correct 3 ms 1280 KB Output is correct
11 Correct 3 ms 1280 KB Output is correct
12 Correct 3 ms 1288 KB Output is correct
13 Correct 3 ms 1408 KB Output is correct
14 Correct 3 ms 1408 KB Output is correct
15 Correct 3 ms 1408 KB Output is correct
16 Correct 4 ms 1460 KB Output is correct
17 Correct 3 ms 1460 KB Output is correct
18 Correct 3 ms 1460 KB Output is correct
19 Correct 3 ms 1460 KB Output is correct
20 Correct 3 ms 1460 KB Output is correct
21 Correct 3 ms 1460 KB Output is correct
22 Correct 3 ms 1460 KB Output is correct
23 Correct 3 ms 1460 KB Output is correct
24 Correct 4 ms 1460 KB Output is correct
25 Correct 3 ms 1480 KB Output is correct
26 Correct 3 ms 1480 KB Output is correct
27 Correct 4 ms 1480 KB Output is correct
28 Correct 3 ms 1480 KB Output is correct
29 Correct 3 ms 1480 KB Output is correct
30 Correct 4 ms 1484 KB Output is correct

Subtask #4
51.0 / 51.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 1144 KB Output is correct
2 Correct 3 ms 1144 KB Output is correct
3 Correct 3 ms 1196 KB Output is correct
4 Correct 3 ms 1248 KB Output is correct
5 Correct 3 ms 1248 KB Output is correct
6 Correct 3 ms 1248 KB Output is correct
7 Correct 3 ms 1280 KB Output is correct
8 Correct 3 ms 1280 KB Output is correct
9 Correct 3 ms 1280 KB Output is correct
10 Correct 3 ms 1280 KB Output is correct
11 Correct 3 ms 1280 KB Output is correct
12 Correct 3 ms 1288 KB Output is correct
13 Correct 3 ms 1408 KB Output is correct
14 Correct 3 ms 1408 KB Output is correct
15 Correct 3 ms 1408 KB Output is correct
16 Correct 4 ms 1460 KB Output is correct
17 Correct 3 ms 1460 KB Output is correct
18 Correct 3 ms 1460 KB Output is correct
19 Correct 3 ms 1460 KB Output is correct
20 Correct 3 ms 1460 KB Output is correct
21 Correct 3 ms 1460 KB Output is correct
22 Correct 3 ms 1460 KB Output is correct
23 Correct 3 ms 1460 KB Output is correct
24 Correct 4 ms 1460 KB Output is correct
25 Correct 3 ms 1480 KB Output is correct
26 Correct 3 ms 1480 KB Output is correct
27 Correct 4 ms 1480 KB Output is correct
28 Correct 3 ms 1480 KB Output is correct
29 Correct 3 ms 1480 KB Output is correct
30 Correct 4 ms 1484 KB Output is correct
31 Correct 3 ms 1484 KB Output is correct
32 Correct 3 ms 1484 KB Output is correct
33 Correct 5 ms 1484 KB Output is correct
34 Correct 11 ms 1484 KB Output is correct
35 Correct 44 ms 1484 KB Output is correct
36 Correct 47 ms 1488 KB Output is correct
37 Correct 51 ms 1488 KB Output is correct
38 Correct 9 ms 1488 KB Output is correct
39 Correct 18 ms 1488 KB Output is correct
40 Correct 22 ms 1488 KB Output is correct