oj.uz

Submission #575247

# Submission time Handle Problem Language Result Execution time Memory
575247 2022-06-10T04:00:03 Z BackNoob Zoltan (COCI16_zoltan) C++14
112 / 140
 106 ms 7068 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);
			}
		}
	}

	// 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 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 328 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 1 ms 336 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 336 KB Output is correct
11 Correct 59 ms 5800 KB Output is correct
12 Correct 50 ms 5120 KB Output is correct
13 Correct 45 ms 4812 KB Output is correct
14 Correct 67 ms 5116 KB Output is correct
15 Correct 88 ms 6220 KB Output is correct
16 Correct 106 ms 7068 KB Output is correct
17 Incorrect 73 ms 6780 KB Output isn't correct
18 Incorrect 73 ms 6840 KB Output isn't correct
19 Incorrect 75 ms 6752 KB Output isn't correct
20 Incorrect 75 ms 6768 KB Output isn't correct