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Submission #572877

# Submission time Handle Problem Language Result Execution time Memory
572877 2022-06-05T12:20:48 Z vovamr Gift (IZhO18_nicegift) C++17
100 / 100
 892 ms 89316 KB 
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define fi first
#define se second
#define ll long long
#define ld long double
#define sz(x) ((int)(x).size())
#define all(x) 	(x).begin(), (x).end()
#define pb push_back
#define mpp make_pair
#define ve vector
using namespace std;
using namespace __gnu_pbds;
template<class T> using oset = tree<T,null_type,less<T>,rb_tree_tag,tree_order_statistics_node_update>;
const ll inf = 1e18; const int iinf = 1e9;
typedef pair<ll, ll> pll;
typedef pair<int, int> pii;
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
template <typename T> inline bool chmin(T& a, T b) { return (a > b ? a = b, 1 : 0); }
template <typename T> inline bool chmax(T& a, T b) { return (a < b ? a = b, 1 : 0); }

inline void solve() {
	ll n, k;
	cin >> n >> k;
	ve<ll> a(n);

	ll s = 0;
	priority_queue<pll> st;
	for (int i = 0; i < n; ++i) {
		cin >> a[i];
		st.push({a[i], i});
		s += a[i];
	}

	if (s % k || st.top().fi > s / k) return void(cout << -1);

	ve<pair<ll,ve<int>>> answer;

	while (sz(st)) {
		ve<pll> ind;
		for (int i = 0; i < k; ++i) {
			ind.pb(st.top());
			st.pop();
		}

		ll add = ind.back().fi;
		if (sz(st)) chmin(add, s / k - st.top().fi);

		answer.pb({add, {}});
		for (auto &[_, i] : ind) {
			s -= add, a[i] -= add;
			if (a[i]) st.push({a[i], i});
			answer.back().se.pb(i);
		}
	}
	cout << sz(answer) << '\n';
	for (auto &[add, vec] : answer) {
		cout << add << " ";
		for (auto i : vec) cout << i + 1 << " ";
		cout << '\n';
	}
}

signed main() {
	ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
	int q = 1; // cin >> q;
	while (q--) solve();
	cerr << fixed << setprecision(3) << "Time execution: " << (double)clock() / CLOCKS_PER_SEC << endl;
}

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB n=4
2 Correct 0 ms 212 KB n=3
3 Correct 0 ms 212 KB n=3
4 Correct 1 ms 212 KB n=4
5 Correct 0 ms 212 KB n=4
6 Correct 0 ms 212 KB n=2

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB n=4
2 Correct 0 ms 212 KB n=3
3 Correct 0 ms 212 KB n=3
4 Correct 1 ms 212 KB n=4
5 Correct 0 ms 212 KB n=4
6 Correct 0 ms 212 KB n=2
7 Correct 1 ms 212 KB n=5
8 Correct 1 ms 324 KB n=8
9 Correct 0 ms 212 KB n=14
10 Correct 0 ms 324 KB n=11
11 Correct 21 ms 3812 KB n=50000
12 Correct 18 ms 3704 KB n=50000
13 Correct 0 ms 212 KB n=10
14 Correct 1 ms 340 KB n=685
15 Correct 1 ms 436 KB n=623
16 Correct 1 ms 340 KB n=973

Subtask #3
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB n=4
2 Correct 0 ms 212 KB n=3
3 Correct 0 ms 212 KB n=3
4 Correct 1 ms 212 KB n=4
5 Correct 0 ms 212 KB n=4
6 Correct 0 ms 212 KB n=2
7 Correct 1 ms 212 KB n=5
8 Correct 1 ms 324 KB n=8
9 Correct 0 ms 212 KB n=14
10 Correct 0 ms 324 KB n=11
11 Correct 21 ms 3812 KB n=50000
12 Correct 18 ms 3704 KB n=50000
13 Correct 0 ms 212 KB n=10
14 Correct 1 ms 340 KB n=685
15 Correct 1 ms 436 KB n=623
16 Correct 1 ms 340 KB n=973
17 Correct 1 ms 340 KB n=989
18 Correct 0 ms 340 KB n=563
19 Correct 1 ms 340 KB n=592
20 Correct 1 ms 340 KB n=938
21 Correct 1 ms 340 KB n=747
22 Correct 1 ms 340 KB n=991

Subtask #4
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 523 ms 70360 KB n=1000000
2 Correct 308 ms 39196 KB n=666666
3 Correct 169 ms 21196 KB n=400000
4 Correct 117 ms 13344 KB n=285714
5 Correct 7 ms 1112 KB n=20000
6 Correct 70 ms 8252 KB n=181818
7 Correct 4 ms 724 KB n=10000
8 Correct 4 ms 608 KB n=6666
9 Correct 2 ms 468 KB n=4000
10 Correct 4 ms 596 KB n=2857
11 Correct 1 ms 340 KB n=2000

Subtask #5
51.0 / 51.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB n=4
2 Correct 0 ms 212 KB n=3
3 Correct 0 ms 212 KB n=3
4 Correct 1 ms 212 KB n=4
5 Correct 0 ms 212 KB n=4
6 Correct 0 ms 212 KB n=2
7 Correct 1 ms 212 KB n=5
8 Correct 1 ms 324 KB n=8
9 Correct 0 ms 212 KB n=14
10 Correct 0 ms 324 KB n=11
11 Correct 21 ms 3812 KB n=50000
12 Correct 18 ms 3704 KB n=50000
13 Correct 0 ms 212 KB n=10
14 Correct 1 ms 340 KB n=685
15 Correct 1 ms 436 KB n=623
16 Correct 1 ms 340 KB n=973
17 Correct 1 ms 340 KB n=989
18 Correct 0 ms 340 KB n=563
19 Correct 1 ms 340 KB n=592
20 Correct 1 ms 340 KB n=938
21 Correct 1 ms 340 KB n=747
22 Correct 1 ms 340 KB n=991
23 Correct 523 ms 70360 KB n=1000000
24 Correct 308 ms 39196 KB n=666666
25 Correct 169 ms 21196 KB n=400000
26 Correct 117 ms 13344 KB n=285714
27 Correct 7 ms 1112 KB n=20000
28 Correct 70 ms 8252 KB n=181818
29 Correct 4 ms 724 KB n=10000
30 Correct 4 ms 608 KB n=6666
31 Correct 2 ms 468 KB n=4000
32 Correct 4 ms 596 KB n=2857
33 Correct 1 ms 340 KB n=2000
34 Correct 14 ms 2432 KB n=23514
35 Correct 13 ms 2400 KB n=23514
36 Correct 1 ms 340 KB n=940
37 Correct 1 ms 212 KB n=2
38 Correct 41 ms 5256 KB n=100000
39 Correct 39 ms 5196 KB n=100000
40 Correct 0 ms 212 KB n=10
41 Correct 1 ms 340 KB n=100
42 Correct 3 ms 468 KB n=1000
43 Correct 566 ms 85852 KB n=1000000
44 Correct 892 ms 89316 KB n=1000000
45 Correct 629 ms 64556 KB n=666666
46 Correct 327 ms 36188 KB n=400000
47 Correct 9 ms 852 KB n=2336
48 Correct 594 ms 47992 KB n=285714
49 Correct 536 ms 41284 KB n=181818
50 Correct 26 ms 2728 KB n=40000
51 Correct 16 ms 1492 KB n=20000
52 Correct 7 ms 972 KB n=10000
53 Correct 56 ms 4068 KB n=6666
54 Correct 4 ms 596 KB n=4000
55 Correct 200 ms 13584 KB n=2857
56 Correct 3 ms 468 KB n=2000