Submission #680484

#	Time	Username	Problem	Language	Result	Execution time	Memory
680484		GusterGoose27	Zoltan (COCI16_zoltan)	C++11	133 / 140	481 ms	33600 KiB

zoltan

#include <bits/stdc++.h>

using namespace std;

const int MAXN = 2e5;
const int MOD = 1e9+7;
int n;
int seq[MAXN];
map<int, int> compress;
typedef pair<int, int> pii;
typedef long long ll;
int t = 0;

pii comb(pii a, pii b) {
	if (a.first == b.first) return pii(a.first, (a.second+b.second)%MOD);
	return max(a, b);
}

class stree {
public:
	stree *l = nullptr;
	stree *r = nullptr;
	pii mx = pii(0, 0);
	stree(int lv, int rv) {
		if (lv < rv) {
			int mid = (lv+rv)/2;
			l = new stree(lv, mid);
			r = new stree(mid+1, rv);
		}
	}
	void upd(int p, pii v, int lp = 0, int rp = t-1) {
		if (lp > p || rp < p) return;
		if (lp == rp) {
			mx = comb(mx, v);
			return;
		}
		int mid = (lp+rp)/2;
		l->upd(p, v, lp, mid);
		r->upd(p, v, mid+1, rp);
		mx = comb(l->mx, r->mx);
	}
	void reset() {
		mx = pii(0, 0);
		if (l) {
			l->reset();
			r->reset();
		}
	}
	pii query(int lv, int rv, int lp = 0, int rp = t-1) {
		if (lp >= lv && rp <= rv) return mx;
		if (lp > rv || rp < lv) return pii(0, 0);
		int mid = (lp+rp)/2;
		return comb(l->query(lv, rv, lp, mid), r->query(lv, rv, mid+1, rp));
	}
};

stree *tree;
pii upseq[MAXN];

int main() {
	ios_base::sync_with_stdio(false); cin.tie(NULL);
	cin >> n;
	set<int> vals;
	for (int i = 0; i < n; i++) {
		cin >> seq[i];
		vals.insert(seq[i]);
	}
	for (int v: vals) {
		compress[v] = t++;
	}
	for (int i = 0; i < n; i++) seq[i] = compress[seq[i]];
	tree = new stree(0, t-1);
	pii ans(0, 0);
	for (int i = n-1; i >= 0; i--) {
		upseq[i] = tree->query(seq[i]+1, t-1);
		upseq[i].first++;
		if (upseq[i].second == 0) upseq[i].second++;
		tree->upd(seq[i], upseq[i]);
	}
	tree->reset();
	for (int i = n-1; i >= 0; i--) {
		pii downseq = tree->query(0, seq[i]-1);
		downseq.first++;
		if (downseq.second == 0) downseq.second++;
		tree->upd(seq[i], downseq);
		ans = comb(ans, pii(upseq[i].first+downseq.first-1, ((ll)upseq[i].second*downseq.second)%MOD));
	}
	for (int i = 0; i < n-ans.first; i++) ans.second = (2*ans.second)%MOD;
	cout << ans.first << " " << ans.second << "\n";
}

• Subtask 1: 133 / 140