Submission #1107922

#	Time	Username	Problem	Language	Result	Execution time	Memory
1107922		stdfloat	Gift (IZhO18_nicegift)	C++17	0 / 100	11 ms	8272 KiB

nicegift

#include <bits/stdc++.h>
using namespace std;

using ll = long long;

#define sz(v)	(int)(v).size()
#define all(v)	(v).begin(), (v).end()

#define ff	first
#define ss	second
#define pii	pair<int, int>

int main() {
	ios::sync_with_stdio(false); cin.tie(nullptr);

	int n, k;
	cin >> n >> k;

	ll sm = 0;
	pair<int, int> p[n];
	for (int i = 0; i < n; i++) {
		cin >> p[i].ff; p[i].ss = i;
	
		sm += p[i].ff;
	}


	if (sm % k) return cout << -1, 0;

	cout << sm / k << '\n';
	while (p[n - 1].ff) {
		sort(p, p + n);

		cout << "1 ";
		for (int i = n - 1; i >= n - k; i--) {
			assert(p[i].ff);
			p[i].ff--;
			cout << p[i].ss + 1 << ' ';
		}
		cout << '\n';
	}
}

• Subtask 1: 0 / 7
• Subtask 2: 0 / 11
• Subtask 3: 0 / 12
• Subtask 4: 0 / 19
• Subtask 5: 0 / 51