Внутренняя информационная подзадача 2
// InsideInformation.cpp : This file contains the 'main' function. Program execution begins and ends there.
//
#include <iostream>
#include <vector>
#include <algorithm>
#include <set>
using namespace std;
typedef vector<int> vi;
typedef vector<vi> vvi;
struct Seg
{
int l, r, mid;
Seg* pl, * pr;
int val = 0;
Seg(int l, int r) : l(l), r(r), mid((l + r) / 2)
{
if(l + 1 < r)
{
pl = new Seg(l, mid);
pr = new Seg(mid, r);
}
}
void pull()
{
val = pl->val + pr->val;
}
void update(int i, int x)
{
if (l + 1 == r)
{
val += x;
return;
}
if (i < mid) pl->update(i, x);
else pr->update(i, x);
pull();
}
int query(int a, int b)
{
if (b <= l || a >= r) return 0;
if (a <= l && r <= b) return val;
return pl->query(a, b) + pr->query(a, b);
}
};
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(0); cout.tie(0);
int N, K; cin >> N >> K;
//vector<set<int>> servers(N);
//for (int i = 0; i < N; i++) servers[i].insert(i);
//vi sz(N, 1);
Seg* root = new Seg(0, N + K);
vi so(N, INT32_MAX), go(N, -1);
so[0] = 0;
for(int i = 0; i < N + K - 1; i++)
{
go[0] = i;
char type; cin >> type;
if (type == 'S')
{
int a, b; cin >> a >> b; a--; b--;
if (b == 0) swap(a, b);
if (so[b] == INT32_MAX) so[b] = i+1;
if (go[b] > -1) root->update(go[b], -1);
go[b] = i+1;
root->update(go[b], 1);
}
if (type == 'Q')
{
int a, d; cin >> a >> d; a--; d--;
if (a == 0) {
if (so[d] != INT32_MAX) cout << "yes" << endl;
else cout << "no" << endl;
}
else
{
if (so[d] <= go[a]) cout << "yes" << endl;
else cout << "no" << endl;
}
}
if (type == 'C')
{
int d; cin >> d; d--;
if (so[d] == INT32_MAX) cout << 1 << endl;
else
{
cout << root->query(so[d], N+K) + 1 << endl;
}
}
}
}
Xanthous Xenomorph