oj.uz

Submission #733932

# Submission time Handle Problem Language Result Execution time Memory
733932 2023-05-01T12:09:56 Z vjudge1 Cryptography (NOI20_crypto) C++17
26 / 100
 1000 ms 24268 KB 
#include <bits/stdc++.h>
using namespace std;
#define ll long long 
const ll d = 1e9 + 7;
map <ll,ll> mp;
ll ft(ll a, ll b) {
    ll ans = 1;
    for(ll i = a; i <= b; i++) {
        ans *= i;
        ans %= d;
    }
    return ans;
}
int main() {
    ll n;
    cin >> n;
    vector <ll> v(n), v1;
    for(ll i = 0; i < n; i++) {
        cin >> v[i];
        mp[v[i]]++;
    }
    v1 = v;
    ll ans = 1;
    sort(v1.begin(), v1.end());
    if(v == v1) {
        cout << 1;
        return 0;
    }
    reverse(v1.begin(), v1.end());
    if(v1 == v) {
        cout << n;
        return 0;
    }
    else reverse(v1.begin(), v1.end());
    for(ll i = 0; i < v.size(); i++) {
        for(ll j = 0; j < v1.size(); j++) {
            if(v[i] == v1[j]) {
                n--;
                if(mp[v[i]] != 1) {
                    ll laa = (ft(2, n) / ft(2, mp[v[i]]));
                    if(laa != 1) ans += laa;
                    mp[v[i]]--;
                    ans %= d;
                    auto it = v1.begin() + j;
                    auto it1 = v.begin() + i;
                    v1.erase(it);
                    v.erase(it1);
                    i--;
                    j--;
                    break;
                }
                ans += ft(2, n) * j;
                ans %= d;
                auto it = v1.begin() + j;
                auto it1 = v.begin() + i;
                v1.erase(it);
                v.erase(it1);
                i--;
                j--;
                break;
            }
        }
    }
    cout << ans;
}

Compilation message

Crypto.cpp: In function 'int main()':
Crypto.cpp:35:21: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   35 |     for(ll i = 0; i < v.size(); i++) {
      |                   ~~^~~~~~~~~~
Crypto.cpp:36:25: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   36 |         for(ll j = 0; j < v1.size(); j++) {
      |                       ~~^~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct

Subtask #2
0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Incorrect 1 ms 340 KB Output isn't correct
7 Halted 0 ms 0 KB -

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Incorrect 193 ms 24268 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Execution timed out 1085 ms 24040 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #5
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 28 ms 468 KB Output is correct
3 Correct 27 ms 528 KB Output is correct
4 Correct 27 ms 468 KB Output is correct
5 Correct 28 ms 544 KB Output is correct
6 Correct 29 ms 468 KB Output is correct
7 Correct 28 ms 540 KB Output is correct
8 Correct 30 ms 468 KB Output is correct
9 Correct 29 ms 552 KB Output is correct
10 Correct 27 ms 440 KB Output is correct
11 Correct 26 ms 564 KB Output is correct
12 Correct 27 ms 468 KB Output is correct
13 Correct 27 ms 528 KB Output is correct
14 Correct 26 ms 468 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 29 ms 556 KB Output is correct
17 Correct 28 ms 468 KB Output is correct
18 Correct 27 ms 468 KB Output is correct
19 Correct 29 ms 468 KB Output is correct
20 Correct 28 ms 468 KB Output is correct
21 Correct 27 ms 440 KB Output is correct
22 Correct 27 ms 468 KB Output is correct

Subtask #6
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Incorrect 1 ms 340 KB Output isn't correct
7 Halted 0 ms 0 KB -

Subtask #7
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Execution timed out 1085 ms 24040 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #8
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Incorrect 1 ms 340 KB Output isn't correct
7 Halted 0 ms 0 KB -