oj.uz

Submission #162908

# Submission time Handle Problem Language Result Execution time Memory
162908 2019-11-10T09:04:48 Z mrboorger Gift (IZhO18_nicegift) C++17
7 / 100
 2000 ms 16864 KB 
//#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx")

#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

#include <bits/stdc++.h>

#define pb push_back
#define F first
#define S second
#define ll long long
#define ull unsigned long long
#define ld long double
#define sqr(x) (x) * (x)

using namespace std;
using namespace __gnu_pbds;


int main()
{
#ifdef LOCAL
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
#endif // LOCAL
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int n, k;
    cin >> n >> k;
    vector <pair <ll, int>> a;
    ll sum = 0;
    for(int i = 0; i < n; ++i)
    {
        int x;
        cin >> x;
        sum += x;
        if (x > 0) a.pb({x, i});
    }
    if (sum % k > 0)
    {
        cout << -1;
        return 0;
    }
    vector <pair <ll, vector <int>>> ans;
    vector <int> cl;
    sort(a.rbegin(), a.rend());
    while(int(a.size()) >= k)
    {
        ans.pb({a[k - 1].F, cl});
        for(int i = 0; i < k; ++i)
        {
            ans.back().S.pb(a[i].S);
            a[i].F -= a[k - 1].F;
        }
        sort(a.rbegin(), a.rend());
        while(!a.empty() && a.back().F == 0)
            a.pop_back();
    }
    if (!a.empty())
    {
        cout << -1;
    }
    else
    {
        cout << int(ans.size()) << '\n';
        for(int i = 0; i < int(ans.size()); ++i)
        {
            cout << ans[i].F << ' ';
            for(int j = 0; j < k; ++j)
                cout << ans[i].S[j] + 1 << ' ';
            cout << '\n';
        }
    }
    return 0;
}

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB n=4
2 Correct 2 ms 376 KB n=3
3 Correct 2 ms 376 KB n=3
4 Correct 2 ms 376 KB n=4
5 Correct 2 ms 376 KB n=4
6 Correct 2 ms 376 KB n=2

Subtask #2
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB n=4
2 Correct 2 ms 376 KB n=3
3 Correct 2 ms 376 KB n=3
4 Correct 2 ms 376 KB n=4
5 Correct 2 ms 376 KB n=4
6 Correct 2 ms 376 KB n=2
7 Correct 2 ms 376 KB n=5
8 Correct 2 ms 376 KB n=8
9 Incorrect 2 ms 376 KB Jury has the answer but participant has not
10 Halted 0 ms 0 KB -

Subtask #3
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB n=4
2 Correct 2 ms 376 KB n=3
3 Correct 2 ms 376 KB n=3
4 Correct 2 ms 376 KB n=4
5 Correct 2 ms 376 KB n=4
6 Correct 2 ms 376 KB n=2
7 Correct 2 ms 376 KB n=5
8 Correct 2 ms 376 KB n=8
9 Incorrect 2 ms 376 KB Jury has the answer but participant has not
10 Halted 0 ms 0 KB -

Subtask #4
0 / 19.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2048 ms 16864 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 51.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB n=4
2 Correct 2 ms 376 KB n=3
3 Correct 2 ms 376 KB n=3
4 Correct 2 ms 376 KB n=4
5 Correct 2 ms 376 KB n=4
6 Correct 2 ms 376 KB n=2
7 Correct 2 ms 376 KB n=5
8 Correct 2 ms 376 KB n=8
9 Incorrect 2 ms 376 KB Jury has the answer but participant has not
10 Halted 0 ms 0 KB -