oj.uz

Submission #575248

# Submission time Handle Problem Language Result Execution time Memory
575248 2022-06-10T04:00:51 Z BackNoob Zoltan (COCI16_zoltan) C++14
112 / 140
 101 ms 6600 KB 
#include <bits/stdc++.h>
#define ll long long
#define fi first
#define se second
#define endl '\n'
#define MASK(i) (1LL << (i))
#define ull unsigned long long
#define ld long double
#define pb push_back
#define all(x) (x).begin() , (x).end()
#define BIT(x , i) ((x >> (i)) & 1)
#define TASK "task"
#define sz(s) (int) (s).size()
 
using namespace std;
const int mxN = 5e5 + 227;
const int inf = 1e9 + 277;
const int mod = 1e9 + 7;
const ll infll = 1e18 + 7;
const int base = 307;
const int LOG = 20;
 
template <typename T1, typename T2> bool minimize(T1 &a, T2 b) {
	if (a > b) {a = b; return true;} return false;
}
template <typename T1, typename T2> bool maximize(T1 &a, T2 b) {
	if (a < b) {a = b; return true;} return false;
}

void add(int &a, int b)
{
	a += b;
	if(a >= mod)
		a -= mod;
}
 
struct fenwick{
	int n;
	vector<int> bit, cnt;
	fenwick(){}
	fenwick(int _n) {
		n = _n;
		bit.resize(n + 7, -inf);
		cnt.resize(n + 7, 0);
	}

	void update(int pos, int val, int way)
	{
		for(; pos <= n; pos += pos & -pos) {
			if(maximize(bit[pos], val) == true) cnt[pos] = way;
			else {
				if(bit[pos] == val) add(cnt[pos], way);
			}
		}
	}

	pair<int, int> getans(int pos)
	{
		pair<int, int> res = {-1, 0};
		for(; pos > 0; pos -= pos & -pos) {
			if(maximize(res.fi, bit[pos]) == true) res.se = cnt[pos];
			else {
				if(res.fi == bit[pos]) add(res.se, cnt[pos]);
			}
		}
		return res;
	}
} ft;

int n;
int a[mxN];
pair<int, int> dp1[mxN];
pair<int, int> dp2[mxN];


void solve()
{
	cin >> n;
	for(int i = 1; i <= n; i++) cin >> a[i];

	vector<int> val;
	for(int i = 1; i <= n; i++) val.pb(a[i]);
	sort(all(val));
	val.erase(unique(all(val)), val.end());
	for(int i = 1; i <= n; i++) 
		a[i] = lower_bound(all(val), a[i]) - val.begin() + 1;

	ft = fenwick(n);
	for(int i = n; i >= 1; i--) {
		maximize(dp1[a[i]], make_pair(1, 1));

		pair<int, int> tmp = ft.getans(a[i] - 1);
		// cout << dp1[a[i]].fi << endl;
		if(maximize(dp1[a[i]].fi, tmp.fi + 1) == true) {
			dp1[a[i]].se = tmp.se;
		}
		else {
			if(dp1[a[i]].fi == tmp.fi + 1)
				add(dp1[a[i]].se, tmp.se);
		}

		ft.update(a[i], dp1[a[i]].fi, dp1[a[i]].se);
	}

	ft = fenwick(n);

	for(int i = n; i >= 1; i--) {
		maximize(dp2[a[i]], make_pair(1, 1));
		pair<int, int> tmp = ft.getans(n - a[i] + 1 - 1);

		if(maximize(dp2[a[i]].fi, tmp.fi + 1) == true) {
			dp2[a[i]].se = tmp.se;
		}
		else {
			if(dp2[a[i]].fi == tmp.fi + 1)
				add(dp2[a[i]].se, tmp.se);
		}

		ft.update(n - a[i] + 1, dp2[a[i]].fi, dp2[a[i]].se);
	}


	pair<int, int> ans = {-1, 0};
	for(int i = n; i >= 1; i--) {
		if(maximize(ans.fi, dp1[a[i]].fi + dp2[a[i]].fi - 1) == true) {
			ans.se = 1LL * dp1[a[i]].se * dp2[a[i]].se % mod;
		}
		else {
			if(ans.fi == dp1[a[i]].fi + dp2[a[i]].fi - 1) {
				add(ans.se, 1LL * dp1[a[i]].se * dp2[a[i]].se % mod);
			}
		}
	}

	// for(int i = 1; i <= n; i++) 
		// cout << dp1[a[i]].fi << ' ' << dp2[a[i]].fi << endl;

	// cout << ans.se << endl;
	for(int i = 1; i <= n - ans.fi; i++) ans.se = 1LL * ans.se * 2 % mod;
	cout << ans.fi << ' ' << ans.se << endl;
}
 
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    //freopen(TASK".in" , "r" , stdin);
    //freopen(TASK".out" , "w" , stdout);
 
    int tc = 1;
    // cin >> tc;
    while(tc--) {
    	solve();
    }
    return 0;
}

Subtask #1
112.0 / 140.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 55 ms 5360 KB Output is correct
12 Correct 53 ms 4760 KB Output is correct
13 Correct 46 ms 4416 KB Output is correct
14 Correct 72 ms 4756 KB Output is correct
15 Correct 87 ms 5848 KB Output is correct
16 Correct 101 ms 6600 KB Output is correct
17 Incorrect 72 ms 6396 KB Output isn't correct
18 Incorrect 72 ms 6396 KB Output isn't correct
19 Incorrect 80 ms 6452 KB Output isn't correct
20 Incorrect 73 ms 6436 KB Output isn't correct