제출 #378811

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
378811		8e7	Gift (IZhO18_nicegift)	C++14	100 / 100	790 ms	75292 KiB

nicegift

//Challenge: Accepted
#include <iostream>
#include <algorithm>
#include <vector>
#include <utility>
#include <queue>
#define ll long long
#define maxn 1000005
#define pii pair<int, ll>
#define ff first
#define ss second
#define io ios_base::sync_with_stdio(0);cin.tie(0);
using namespace std;
ll a[maxn], pref[maxn], val[maxn];
ll out[3 * maxn];
bool ed[3 * maxn];
int main() {
	io
	ll n, k;
	cin >> n >> k;
	ll m = 0;
	for (int i = 0;i < n;i++) {
		cin >> a[i];
		m += a[i];
		pref[i] = m;
	}

	bool poss = m % k == 0;
	ll siz = m / k;
	int vs = 0;

	for (int i = 0;i < n;i++) {
		if (a[i] > siz) {
			poss = false;
			break;
		}
		val[vs++] = pref[i] % siz;
	}
	val[vs++] = siz;
	sort(val, val + vs);
	if (!poss) {
		cout << -1 << endl;
	} else {
		int num = 0, cnt = 0;
		ll cur = 0;
		for (int i = 0;i < vs;i++) {
			//cout << val[i] << " " << cur << endl;
			if (val[i] - cur > 0) { //[cur, val[i])
				out[num++] = val[i] - cur;
				int ind = upper_bound(pref, pref + n, cur) - pref;
				for (ll j = cur;j < m;j += m / k) {
					ind = upper_bound(pref, pref + n, j) - pref;
					if (ind < n) out[num++] = ind+1;
				}
				ed[num - 1] = true;
				cur = val[i];
				cnt++;
			}
		}
		cout << cnt << "\n";

		for (int i = 0;i < num;i++) {
			cout << out[i] << (ed[i] ? '\n' : ' ');
		}
	}
}
/*
4 2
2 3 3 2

6 4
4 1 3 5 5 2
 */

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