oj.uz

Submission #443645

# Submission time Handle Problem Language Result Execution time Memory
443645 2021-07-11T06:52:16 Z Karliver Drvca (COCI19_drvca) C++14
110 / 110
 105 ms 8260 KB 
    
#include <bits/stdc++.h>

#define FIXED_FLOAT(x)  std::fixed <<std::setprecision(20) << (x)
#define all(v) (v).begin(), (v).end()
using namespace  std;
#define forn(i,n) for (int i = 0; i < (n); ++i)
#define rforn(i, n) for(int i = (n) - 1;i >= 0;--i)
using ll = long long;
int mod = (ll)1e9 + 7;
#define PI acos(-1)
typedef pair<int, int> pairs;

const int INF = 1e9 + 1;
const int N = 2e5 + 100;
const double eps = 1e-7;

template <class T> using V = vector<T>;  
template <class T> using VV = V<V<T>>;  

template <typename XPAX>
void ckma(XPAX &x, XPAX y) {
    x = (x < y ? y : x);
}
template <typename XPAX>
void ckmi(XPAX &x, XPAX y) {
    x = (x > y ? y : x);
}

void write(V<int> a, V<int> b) {
    if(b.empty()) {
        b.push_back(a.back());
        a.pop_back();
    }

    cout << a.size() << '\n';

    for(auto c : a) cout << c << ' ';

    cout << '\n';
    

    cout << b.size() << '\n';

    for(auto c : b) cout << c << ' ';

    exit(0);
}


multiset<int> ps;
int bad = 0;
bool issok(multiset<int>::iterator it) {
    auto nxt = it;

    ++nxt;
    if(nxt == ps.end() || it == ps.begin())return true;

    auto pr = it;
    --pr;

    return ((*it - *pr) == (*nxt - *it));
}

void add(int x) {
    if(ps.size() < 2) {
        ps.insert(x);
        return;
    }

    auto it = ps.insert(x);

    --it;
    bad += !issok(it);
}



void del(int x) {
    auto it =  ps.lower_bound(x);

    bad -= !issok(it);

    auto pr = it;
    
    if(pr != ps.begin()) {
        pr--;
        bad -= !issok(pr);
    }


    auto nxt = it;
    if(nxt != ps.end()) {
        nxt++;
        if(nxt != ps.end()) {
            bad -= !issok(nxt);
        }
    }

    it = ps.erase(it);

    if(it != ps.end()) {
        bad += !issok(it);
    }
    if(it != ps.begin()) {
        --it;
        bad += !issok(it);
    }
}



void solve() {


    int n;
    cin >> n;


    V<int> a(n);

    forn(i, n) cin >> a[i];

    sort(all(a));


    if(n == 2) {
        cout << 1 << '\n' << a[0] << '\n' << 1 << '\n' << a[1] << '\n';
        return;
    }

    if(n == 3) {
        cout << 2 << '\n' << a[0] << ' ' << a[1] << '\n' << 1 << '\n' << a[2] << '\n';
        return;
    }

    if(n == 4) {

        cout << 2 << '\n' << a[0] << ' ' << a[1] << '\n' << 2 << '\n' << a[2] << ' ' << a[3] << '\n';
        return;
    }



    for(int p = 0;p < 3;++p) {
        for(int q = p + 1;q < 3;++q) {

            int dif = a[q] - a[p];

            int nt = a[q] + dif;

            ps.clear();
            bad = 0;

            for(int x = 0;x < n;++x) {
                if(x == p || x == q)continue;

                add(a[x]);
            }

            V<int> one{a[p], a[q]}, two;

            if(bad == 0) {
                for(auto c : ps)two.push_back(c);

                write(one, two);
            }

            for(int x = q + 1;x < n;++x) {
                if(a[x] == nt) {
                    one.push_back(nt);
                    del(nt);

                    if(bad == 0) {
                        for(auto t : ps)
                            two.push_back(t);

                        write(one, two);
                    }
                    nt += dif;
                }
            }
        }
    }
    cout << -1 << '\n';








}
void test_case() {
    int t;
    cin >> t;
    forn(p, t) {

        //cout << "Case #" << p + 1 << ": ";
        solve();
    }
}
int main() {

    ios::sync_with_stdio(false);
    cin.tie(0);

    solve();

}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 0 ms 204 KB Output is correct
13 Correct 0 ms 204 KB Output is correct
14 Correct 0 ms 204 KB Output is correct

Subtask #2
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 0 ms 204 KB Output is correct
13 Correct 0 ms 204 KB Output is correct
14 Correct 0 ms 204 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 1 ms 204 KB Output is correct
18 Correct 1 ms 316 KB Output is correct
19 Correct 1 ms 312 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Correct 1 ms 332 KB Output is correct
22 Correct 1 ms 332 KB Output is correct
23 Correct 1 ms 204 KB Output is correct
24 Correct 1 ms 332 KB Output is correct
25 Correct 1 ms 204 KB Output is correct
26 Correct 1 ms 204 KB Output is correct
27 Correct 1 ms 332 KB Output is correct
28 Correct 1 ms 332 KB Output is correct
29 Correct 1 ms 332 KB Output is correct
30 Correct 0 ms 204 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 66 ms 8260 KB Output is correct
2 Correct 61 ms 7252 KB Output is correct
3 Correct 67 ms 8208 KB Output is correct
4 Correct 62 ms 7408 KB Output is correct
5 Correct 66 ms 8224 KB Output is correct
6 Correct 61 ms 7364 KB Output is correct
7 Correct 71 ms 8252 KB Output is correct
8 Correct 63 ms 7444 KB Output is correct
9 Correct 61 ms 6852 KB Output is correct
10 Correct 64 ms 7676 KB Output is correct
11 Correct 52 ms 8240 KB Output is correct
12 Correct 0 ms 204 KB Output is correct

Subtask #4
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 0 ms 204 KB Output is correct
13 Correct 0 ms 204 KB Output is correct
14 Correct 0 ms 204 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 1 ms 204 KB Output is correct
18 Correct 1 ms 316 KB Output is correct
19 Correct 1 ms 312 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Correct 1 ms 332 KB Output is correct
22 Correct 1 ms 332 KB Output is correct
23 Correct 1 ms 204 KB Output is correct
24 Correct 1 ms 332 KB Output is correct
25 Correct 1 ms 204 KB Output is correct
26 Correct 1 ms 204 KB Output is correct
27 Correct 1 ms 332 KB Output is correct
28 Correct 1 ms 332 KB Output is correct
29 Correct 1 ms 332 KB Output is correct
30 Correct 0 ms 204 KB Output is correct
31 Correct 66 ms 8260 KB Output is correct
32 Correct 61 ms 7252 KB Output is correct
33 Correct 67 ms 8208 KB Output is correct
34 Correct 62 ms 7408 KB Output is correct
35 Correct 66 ms 8224 KB Output is correct
36 Correct 61 ms 7364 KB Output is correct
37 Correct 71 ms 8252 KB Output is correct
38 Correct 63 ms 7444 KB Output is correct
39 Correct 61 ms 6852 KB Output is correct
40 Correct 64 ms 7676 KB Output is correct
41 Correct 52 ms 8240 KB Output is correct
42 Correct 0 ms 204 KB Output is correct
43 Correct 67 ms 7608 KB Output is correct
44 Correct 105 ms 6756 KB Output is correct
45 Correct 58 ms 6964 KB Output is correct
46 Correct 61 ms 7376 KB Output is correct
47 Correct 100 ms 6540 KB Output is correct
48 Correct 57 ms 6960 KB Output is correct
49 Correct 65 ms 7352 KB Output is correct
50 Correct 90 ms 6468 KB Output is correct
51 Correct 61 ms 7108 KB Output is correct
52 Correct 63 ms 7320 KB Output is correct
53 Correct 101 ms 6580 KB Output is correct
54 Correct 58 ms 6980 KB Output is correct
55 Correct 65 ms 7272 KB Output is correct
56 Correct 58 ms 7280 KB Output is correct
57 Correct 50 ms 8256 KB Output is correct
58 Correct 0 ms 204 KB Output is correct