Submission #377950

#	Time	Username	Problem	Language	Result	Execution time	Memory
377950		SeDunion	Gift (IZhO18_nicegift)	C++17	7 / 100	2066 ms	29676 KiB

nicegift

#include<bits/stdc++.h>
#ifndef LOCAL
#define cerr if(false)cerr
#endif // LOCAL
using namespace std;
using ll = long long;
const int N = 1e6 + 66;

pair<ll,int>a[N];
vector<vector<int>>ans;

int main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0), cout.tie(0);
	int n, k;
	cin >> n >> k;
	for (int i = 1 ; i <= n ; ++ i) {
		cin >> a[i].first; a[i].second = i;
	}
	bool ok = 1;
	while (1) {
		sort(a + 1, a + 1 + n);
		reverse(a + 1, a + 1 + n);
		if (a[1].first == 0) break;
		ans.push_back(vector<int>(k));
		for (int i = 1 ; i <= k ; ++ i) {
			if (a[i].first <= 0) {
				ok = 0;
				break;
			}
			a[i].first--;
			ans.back()[i - 1] = a[i].second;
		}
	}
	if (ok == 0) {
		cout << "-1";
		return 0;
	}
	cout << ans.size() << "\n";
	for (auto vec : ans) {
		cout << "1 ";
		for (int i : vec) cout << i << " ";
		cout << "\n";
	}
}

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