Submission #520471

#	Time	Username	Problem	Language	Result	Execution time	Memory
520471		blue	Growing Trees (BOI11_grow)	C++17	0 / 100	40 ms	5892 KiB

grow

#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

using vi = vector<int>;
using ll = long long;
using vll = vector<ll>;

const int mx = 100'000;

const int Z = (1<<17);


vll delta(1+mx);

int N, M;


struct segtree
{
	vi l = vi(1+Z);
	vi r = vi(1+Z);
	vll sm = vll(1+Z);

	segtree()
	{
		;
	}

	void build(int i, int L, int R)
	{
		l[i] = L;
		r[i] = R;
		if(l[i] == r[i])
		{
			sm[i] = delta[l[i]];
		}
		else
		{
			build(2*i, L, (L+R)/2);
			build(2*i+1, (L+R)/2+1, R);
			sm[i] = sm[2*i] + sm[2*i+1];
		}
	}

	int first_geq(int i, ll s)
	{
		// cerr << i << ' ' << l[i] << ' ' << r[i] << " : " << sm[i] << ' ' << s << '\n';
		if(sm[i] < s) return N+1;
		else if(l[i] == r[i]) return l[i];
		else if(sm[i<<1] >= s) return first_geq(i<<1, s);
		else return first_geq((i<<1) + 1, s - sm[i<<1]);
	}

	int first_geq(ll s) {return first_geq(1, s);}

	void add(int i, int I, ll V)
	{
		sm[i] += V;
		if(l[i] != r[i])
		{
			if(I <= (l[i] + r[i])/2) add(2*i, I, V);
			else add(2*i+1, I, V);
		}
	}

	void add(int I, int V) {add(1, I, V);}

	int get_sum(int i, int I)
	{
		if(l[i] == r[i]) return sm[i];
		else if(I <= (l[i] + r[i])/2) return get_sum(i<<1, I);
		else return sm[(i<<1)] + get_sum((i<<1) + 1, I);
	}
};

int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);

	cin >> N >> M;

	vll init_h(1+N);
	for(int i = 1; i <= N; i++) cin >> init_h[i];
	init_h[0] = 0;

	sort(init_h.begin(), init_h.end());

	for(int i = 1; i <= N; i++) delta[i] = init_h[i] - init_h[i-1];

	segtree S;
	S.build(1, 1, N);

	for(int q = 1; q <= M; q++)
	{
		char t;
		cin >> t;

		if(t == 'F')
		{
			ll c, h;
			cin >> c >> h;

			int stp = S.first_geq(h);

			if(stp >= N+1) continue;

			int ep = min(stp + c - 1, (ll)N);

			ll ep_val = S.get_sum(1, ep);

			int last_start = S.first_geq(1, ep_val);
			int last_end = S.first_geq(1, ep_val+1) - 1;


			int last_count = ep - last_start + 1;

			S.add(last_end - last_count + 1, +1);
			S.add(last_end+1, -1);

			S.add(stp, +1);
			S.add(last_start, -1);
		}
		else
		{
			ll mn, mx;
			cin >> mn >> mx;

			cout << S.first_geq(1, mx+1) - S.first_geq(1, mn) << '\n';
		}
	}

}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 10
• Subtask 3: 0 / 10
• Subtask 4: 0 / 10
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10