oj.uz

Submission #973222

# Submission time Handle Problem Language Result Execution time Memory
973222 2024-05-01T16:20:55 Z njoop Cryptography (NOI20_crypto) C++14
0 / 100
 4 ms 4700 KB 
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <bits/stdc++.h>
#define ll long long

using namespace __gnu_pbds;
using namespace std;

int n, in, ord[300010], idx;
ll fac[3000010], mod = 1e9+7, ans;
vector<pair<int, int>> v;

typedef tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> ordered_set;

ordered_set s;

int main() {
    cin.tie(0)->sync_with_stdio(0);
    fac[0] = 1;
    for(int i=1; i<300010; i++) {
        fac[i] = i*fac[i-1];
        fac[i] %= mod;
    }
    cin >> n;
    for(int i=1; i<=n; i++) {
        cin >> in;
        v.push_back({in, i});
    }
    sort(v.begin(), v.end());
    for(int i=0; i<v.size(); i++) {
        ord[v[i].second] = i;
    }
    for(int i=1; i<=n; i++) {
        idx = s.order_of_key(ord[i]);
        ans += (ord[i]-idx)*fac[n-i];
        ans %= mod;
        s.insert(ord[i]);
    }
    cout << ans;
    return 0;
}

Compilation message

Crypto.cpp: In function 'int main()':
Crypto.cpp:30:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   30 |     for(int i=0; i<v.size(); i++) {
      |                  ~^~~~~~~~~

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 4700 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 9.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 4700 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 4700 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 4700 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 4700 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 13.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 4700 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 19.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 4700 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 4700 KB Output isn't correct
2 Halted 0 ms 0 KB -