oj.uz

Submission #261288

# Submission time Handle Problem Language Result Execution time Memory
261288 2020-08-11T15:52:40 Z Haunted_Cpp Cryptography (NOI20_crypto) C++17
25 / 100
 93 ms 7976 KB 
/**
 *  author: Haunted_Cpp
**/
 
#include <bits/stdc++.h>
using namespace std;
 
#pragma GCC optimize("Ofast")
#pragma GCC target("fma,sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native")
#pragma GCC optimize("unroll-loops")
 
template<typename T> ostream &operator << (ostream &os, const vector<T> &v) { os << '{'; string sep; for (const auto &x : v) os << sep << x, sep = ", "; return os << '}'; }
template<typename T, size_t size> ostream &operator << (ostream &os, const array<T, size> &arr) { os << '{'; string sep; for (const auto &x : arr) os << sep << x, sep = ", "; return os << '}'; }
template<typename A, typename B> ostream &operator << (ostream &os, const pair<A, B> &p) { return os << '(' << p.first << ", " << p.second << ')'; }
 
void debug_out() { cerr << endl; }
template<typename Head, typename... Tail> void debug_out(Head H, Tail... T) { cerr << ' ' << H; debug_out(T...); }
 
#ifdef LOCAL
#define debug(...) cerr << "(" << #__VA_ARGS__ << "):", debug_out(__VA_ARGS__)
#else
#define debug(...) 47
#endif

const int MAX_N = 3e5 + 5;
const int MOD = 1e9 + 7;

int f[MAX_N], bit[MAX_N];

void update(int idx, int delta) {
  for (; idx < MAX_N; idx += idx & (- idx)) {
    bit[idx] += delta;
  }
}

int query(int idx) {
  int res = 0;
  for (; idx > 0; idx -= idx & (- idx)) {
    res += bit[idx];
  }
  return res;
}

int add(int a, int b) {
  int res = a + b;
  if (res >= MOD) res += MOD;
  if (res < 0) res += MOD;
  return res;
}

int mult(int a, int b) {
  long long res = 1LL * a * b;
  if (res >= MOD) res %= MOD;
  return res;
}

int main () {
  ios::sync_with_stdio(0);
  cin.tie(0);
  int n;
  cin >> n;
  vector<int> arr(n);
  vector<int> c(n);
  for (int i = 0; i < n; i++) {
    cin >> arr[i];
    c[i] = arr[i];
  }
  sort(c.begin(), c.end());
  c.erase(unique(c.begin(), c.end()), c.end());
  for (auto &to : arr) {
    to = lower_bound(c.begin(), c.end(), to) - c.begin() + 1;
    update(to, +1);
  }
  f[0] = 1;
  for (int i = 1; i < MAX_N; i++) {
    f[i] = mult(f[i - 1], i);
  }
  int res = 0;
  int left = n - 1;
  for (int i = 0; i < n; left--, i++) {
    int l = query(arr[i] - 1);
    res = add(res, mult(l, f[left]));
    update(arr[i], -1);
  }
  cout << add(res, +1) << '\n';
  return 0;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 1536 KB Output is correct
2 Correct 3 ms 1536 KB Output is correct

Subtask #2
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 1536 KB Output is correct
2 Correct 3 ms 1536 KB Output is correct
3 Correct 3 ms 1536 KB Output is correct
4 Correct 4 ms 1536 KB Output is correct
5 Correct 3 ms 1536 KB Output is correct
6 Correct 4 ms 1536 KB Output is correct
7 Correct 3 ms 1536 KB Output is correct
8 Correct 3 ms 1536 KB Output is correct
9 Correct 3 ms 1536 KB Output is correct
10 Correct 3 ms 1536 KB Output is correct
11 Correct 3 ms 1536 KB Output is correct
12 Correct 3 ms 1536 KB Output is correct
13 Correct 3 ms 1536 KB Output is correct
14 Correct 3 ms 1536 KB Output is correct
15 Correct 3 ms 1536 KB Output is correct
16 Correct 3 ms 1536 KB Output is correct
17 Correct 3 ms 1536 KB Output is correct
18 Correct 3 ms 1536 KB Output is correct
19 Correct 3 ms 1536 KB Output is correct
20 Correct 3 ms 1536 KB Output is correct
21 Correct 3 ms 1536 KB Output is correct
22 Correct 3 ms 1536 KB Output is correct
23 Correct 3 ms 1536 KB Output is correct
24 Correct 3 ms 1536 KB Output is correct

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 1536 KB Output is correct
2 Incorrect 93 ms 7976 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 1536 KB Output is correct
2 Correct 82 ms 7032 KB Output is correct
3 Correct 83 ms 7032 KB Output is correct
4 Correct 84 ms 6904 KB Output is correct
5 Correct 85 ms 7000 KB Output is correct
6 Correct 84 ms 7032 KB Output is correct
7 Correct 83 ms 7032 KB Output is correct
8 Correct 83 ms 6904 KB Output is correct
9 Correct 84 ms 7032 KB Output is correct
10 Correct 83 ms 7032 KB Output is correct
11 Correct 84 ms 6904 KB Output is correct
12 Correct 83 ms 7160 KB Output is correct
13 Correct 83 ms 7032 KB Output is correct
14 Correct 83 ms 6904 KB Output is correct
15 Correct 84 ms 7032 KB Output is correct
16 Correct 82 ms 7160 KB Output is correct
17 Correct 84 ms 7032 KB Output is correct
18 Correct 85 ms 7032 KB Output is correct
19 Correct 83 ms 7032 KB Output is correct
20 Correct 83 ms 7032 KB Output is correct
21 Correct 83 ms 6904 KB Output is correct

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 1536 KB Output is correct
2 Incorrect 4 ms 1536 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #6
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 1536 KB Output is correct
2 Correct 3 ms 1536 KB Output is correct
3 Correct 3 ms 1536 KB Output is correct
4 Correct 4 ms 1536 KB Output is correct
5 Correct 3 ms 1536 KB Output is correct
6 Correct 4 ms 1536 KB Output is correct
7 Correct 3 ms 1536 KB Output is correct
8 Correct 3 ms 1536 KB Output is correct
9 Correct 3 ms 1536 KB Output is correct
10 Correct 3 ms 1536 KB Output is correct
11 Correct 3 ms 1536 KB Output is correct
12 Correct 3 ms 1536 KB Output is correct
13 Correct 3 ms 1536 KB Output is correct
14 Correct 3 ms 1536 KB Output is correct
15 Correct 3 ms 1536 KB Output is correct
16 Correct 3 ms 1536 KB Output is correct
17 Correct 3 ms 1536 KB Output is correct
18 Correct 3 ms 1536 KB Output is correct
19 Correct 3 ms 1536 KB Output is correct
20 Correct 3 ms 1536 KB Output is correct
21 Correct 3 ms 1536 KB Output is correct
22 Correct 3 ms 1536 KB Output is correct
23 Correct 3 ms 1536 KB Output is correct
24 Correct 3 ms 1536 KB Output is correct
25 Correct 3 ms 1536 KB Output is correct
26 Incorrect 4 ms 1536 KB Output isn't correct
27 Halted 0 ms 0 KB -

Subtask #7
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 1536 KB Output is correct
2 Correct 82 ms 7032 KB Output is correct
3 Correct 83 ms 7032 KB Output is correct
4 Correct 84 ms 6904 KB Output is correct
5 Correct 85 ms 7000 KB Output is correct
6 Correct 84 ms 7032 KB Output is correct
7 Correct 83 ms 7032 KB Output is correct
8 Correct 83 ms 6904 KB Output is correct
9 Correct 84 ms 7032 KB Output is correct
10 Correct 83 ms 7032 KB Output is correct
11 Correct 84 ms 6904 KB Output is correct
12 Correct 83 ms 7160 KB Output is correct
13 Correct 83 ms 7032 KB Output is correct
14 Correct 83 ms 6904 KB Output is correct
15 Correct 84 ms 7032 KB Output is correct
16 Correct 82 ms 7160 KB Output is correct
17 Correct 84 ms 7032 KB Output is correct
18 Correct 85 ms 7032 KB Output is correct
19 Correct 83 ms 7032 KB Output is correct
20 Correct 83 ms 7032 KB Output is correct
21 Correct 83 ms 6904 KB Output is correct
22 Correct 3 ms 1536 KB Output is correct
23 Incorrect 4 ms 1536 KB Output isn't correct
24 Halted 0 ms 0 KB -

Subtask #8
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 1536 KB Output is correct
2 Correct 3 ms 1536 KB Output is correct
3 Correct 3 ms 1536 KB Output is correct
4 Correct 4 ms 1536 KB Output is correct
5 Correct 3 ms 1536 KB Output is correct
6 Correct 4 ms 1536 KB Output is correct
7 Correct 3 ms 1536 KB Output is correct
8 Correct 3 ms 1536 KB Output is correct
9 Correct 3 ms 1536 KB Output is correct
10 Correct 3 ms 1536 KB Output is correct
11 Correct 3 ms 1536 KB Output is correct
12 Correct 3 ms 1536 KB Output is correct
13 Correct 3 ms 1536 KB Output is correct
14 Correct 3 ms 1536 KB Output is correct
15 Correct 3 ms 1536 KB Output is correct
16 Correct 3 ms 1536 KB Output is correct
17 Correct 3 ms 1536 KB Output is correct
18 Correct 3 ms 1536 KB Output is correct
19 Correct 3 ms 1536 KB Output is correct
20 Correct 3 ms 1536 KB Output is correct
21 Correct 3 ms 1536 KB Output is correct
22 Correct 3 ms 1536 KB Output is correct
23 Correct 3 ms 1536 KB Output is correct
24 Correct 3 ms 1536 KB Output is correct
25 Correct 3 ms 1536 KB Output is correct
26 Incorrect 93 ms 7976 KB Output isn't correct
27 Halted 0 ms 0 KB -