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Submission #519786

# Submission time Handle Problem Language Result Execution time Memory
519786 2022-01-27T10:33:58 Z Dasha_Gnedko Gift (IZhO18_nicegift) C++17
100 / 100
 1591 ms 269492 KB 
#include <bits/stdc++.h>

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

//#pragma GCC optimize("Ofast")
//#pragma GCC target("avx2")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4")

using namespace std;

//using namespace __gnu_pbds;
//template <typename T> using ordered_set = tree <T, null_type, less < T >, rb_tree_tag, tree_order_statistics_node_update>;

mt19937 gen(time(0));

#define ll long long
#define ld long double
#define pb push_back
#define F first
#define S second
#define TIME clock() * 1.0 / CLOCKS_PER_SEC
#define sz(a) int32_t(a.size())
#define endl '\n'
//#define int long long

const int N = 4e6 + 100;
const int M = 18;
const int mod = 998244353;
const int inf = 1e9 + 7;

pair < ll, int > a[N];
set < pair < pair < int, int >, pair < ll, int > > > st;
vector < int > ans[N];
int nxt[1000100];

int get(int i)
{
    if (i == -1 || a[i].F) return i;
    return nxt[i] = get(nxt[i]);
}

int32_t main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

#ifdef LOCAL
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
#else
//    freopen("input.txt", "r", stdin);
//    freopen("output.txt", "w", stdout);
#endif // LOCAL

    int n, k;
    cin >> n >> k;
    ll sum = 0, mx = 0;
    for(int i = 0; i < n; i++)
    {
        cin >> a[i].F;
        mx = max(mx, a[i].F);
        sum += a[i].F;
        a[i].S = i;
        nxt[i] = i + 1;
    }
    nxt[n - 1] = -1;
    if (sum % k || mx > sum / k)
    {
        cout << -1;
        return 0;
    }
    sort(a, a + n);
    reverse(a, a + n);
    int uk = 1;
    st.insert({{0, 0}, {sum / k, 0}});
    vector < pair < ll, int > > ve;
    while (sz(st))
    {
        pair < pair < int, int >, pair < ll, int > > p = *st.begin();
        st.erase(st.begin());
        int sz = p.F.F, i = get(p.F.S), numb = p.S.S; ll k = p.S.F;
        if (i == -1)
        {
            ve.pb({k, numb});
            continue;
        }
        if (a[i].F >= k)
        {
            a[i].F -= k;
            ans[numb].pb(a[i].S);
            st.insert({{sz + 1, i + 1}, {k, numb}});
            continue;
        }
        for(auto to: ans[numb])
            ans[uk].pb(to);
        ans[uk].pb(a[i].S);
        st.insert({{sz, i + 1}, {k - a[i].F, numb}});
        st.insert({{sz + 1, i + 1}, {a[i].F, uk}});
        a[i].F = 0;
        uk++;
    }
    cout << uk << endl;
    for(auto to: ve)
    {
        cout << to.F << " ";
        for(auto x: ans[to.S])
            cout << x + 1 << " ";
        cout << endl;
    }
}

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 49 ms 94192 KB n=4
2 Correct 43 ms 94156 KB n=3
3 Correct 44 ms 94248 KB n=3
4 Correct 44 ms 94208 KB n=4
5 Correct 43 ms 94228 KB n=4
6 Correct 53 ms 94132 KB n=2

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 49 ms 94192 KB n=4
2 Correct 43 ms 94156 KB n=3
3 Correct 44 ms 94248 KB n=3
4 Correct 44 ms 94208 KB n=4
5 Correct 43 ms 94228 KB n=4
6 Correct 53 ms 94132 KB n=2
7 Correct 43 ms 94168 KB n=5
8 Correct 43 ms 94220 KB n=8
9 Correct 45 ms 94152 KB n=14
10 Correct 44 ms 94188 KB n=11
11 Correct 85 ms 102456 KB n=50000
12 Correct 82 ms 101928 KB n=50000
13 Correct 48 ms 94264 KB n=10
14 Correct 45 ms 94316 KB n=685
15 Correct 46 ms 94244 KB n=623
16 Correct 47 ms 94404 KB n=973

Subtask #3
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 49 ms 94192 KB n=4
2 Correct 43 ms 94156 KB n=3
3 Correct 44 ms 94248 KB n=3
4 Correct 44 ms 94208 KB n=4
5 Correct 43 ms 94228 KB n=4
6 Correct 53 ms 94132 KB n=2
7 Correct 43 ms 94168 KB n=5
8 Correct 43 ms 94220 KB n=8
9 Correct 45 ms 94152 KB n=14
10 Correct 44 ms 94188 KB n=11
11 Correct 85 ms 102456 KB n=50000
12 Correct 82 ms 101928 KB n=50000
13 Correct 48 ms 94264 KB n=10
14 Correct 45 ms 94316 KB n=685
15 Correct 46 ms 94244 KB n=623
16 Correct 47 ms 94404 KB n=973
17 Correct 44 ms 94348 KB n=989
18 Correct 46 ms 94348 KB n=563
19 Correct 52 ms 94456 KB n=592
20 Correct 48 ms 94404 KB n=938
21 Correct 46 ms 94460 KB n=747
22 Correct 48 ms 94488 KB n=991

Subtask #4
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 750 ms 204676 KB n=1000000
2 Correct 450 ms 152304 KB n=666666
3 Correct 274 ms 123932 KB n=400000
4 Correct 188 ms 112660 KB n=285714
5 Correct 53 ms 95268 KB n=20000
6 Correct 128 ms 104788 KB n=181818
7 Correct 47 ms 94656 KB n=10000
8 Correct 79 ms 97700 KB n=6666
9 Correct 44 ms 94424 KB n=4000
10 Correct 206 ms 106596 KB n=2857
11 Correct 42 ms 94280 KB n=2000

Subtask #5
51.0 / 51.0

# Verdict Execution time Memory Grader output
1 Correct 49 ms 94192 KB n=4
2 Correct 43 ms 94156 KB n=3
3 Correct 44 ms 94248 KB n=3
4 Correct 44 ms 94208 KB n=4
5 Correct 43 ms 94228 KB n=4
6 Correct 53 ms 94132 KB n=2
7 Correct 43 ms 94168 KB n=5
8 Correct 43 ms 94220 KB n=8
9 Correct 45 ms 94152 KB n=14
10 Correct 44 ms 94188 KB n=11
11 Correct 85 ms 102456 KB n=50000
12 Correct 82 ms 101928 KB n=50000
13 Correct 48 ms 94264 KB n=10
14 Correct 45 ms 94316 KB n=685
15 Correct 46 ms 94244 KB n=623
16 Correct 47 ms 94404 KB n=973
17 Correct 44 ms 94348 KB n=989
18 Correct 46 ms 94348 KB n=563
19 Correct 52 ms 94456 KB n=592
20 Correct 48 ms 94404 KB n=938
21 Correct 46 ms 94460 KB n=747
22 Correct 48 ms 94488 KB n=991
23 Correct 750 ms 204676 KB n=1000000
24 Correct 450 ms 152304 KB n=666666
25 Correct 274 ms 123932 KB n=400000
26 Correct 188 ms 112660 KB n=285714
27 Correct 53 ms 95268 KB n=20000
28 Correct 128 ms 104788 KB n=181818
29 Correct 47 ms 94656 KB n=10000
30 Correct 79 ms 97700 KB n=6666
31 Correct 44 ms 94424 KB n=4000
32 Correct 206 ms 106596 KB n=2857
33 Correct 42 ms 94280 KB n=2000
34 Correct 62 ms 97988 KB n=23514
35 Correct 65 ms 98004 KB n=23514
36 Correct 55 ms 94452 KB n=940
37 Correct 49 ms 94192 KB n=2
38 Correct 227 ms 115040 KB n=100000
39 Correct 211 ms 115004 KB n=100000
40 Correct 49 ms 94224 KB n=10
41 Correct 49 ms 94272 KB n=100
42 Correct 60 ms 94784 KB n=1000
43 Correct 1193 ms 256280 KB n=1000000
44 Correct 1591 ms 269492 KB n=1000000
45 Correct 1228 ms 213436 KB n=666666
46 Correct 930 ms 185904 KB n=400000
47 Correct 386 ms 113504 KB n=2336
48 Correct 796 ms 160944 KB n=285714
49 Correct 678 ms 148556 KB n=181818
50 Correct 411 ms 122024 KB n=40000
51 Correct 372 ms 118296 KB n=20000
52 Correct 386 ms 115576 KB n=10000
53 Correct 398 ms 118664 KB n=6666
54 Correct 334 ms 110900 KB n=4000
55 Correct 357 ms 115848 KB n=2857
56 Correct 377 ms 111468 KB n=2000