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subsets_DPSOS.cpp
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/*
* J1K7_7
*
* You can use my contents on a Creative Commons - Attribution 4.0 International - CC BY 4.0 License. XD
* - JASKAMAL KAINTH
*/
#include <iostream>
#include <sstream>
#include <fstream>
#include <string>
#include <cstring>
#include <vector>
#include <deque>
#include <queue>
#include <stack>
#include <set>
#include <cstring>
#include <cassert>
#include <list>
#include <map>
#include <unordered_map>
#include <iomanip>
#include <algorithm>
#include <functional>
#include <utility>
#include <bitset>
#include <cmath>
#include <cstdlib>
#include <ctime>
#include <cstdio>
#include <limits>
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
typedef vector<int> vi;
typedef vector<long long> vll;
#define left(x) (x << 1)
#define right(x) (x << 1) + 1
#define mid(l, r) ((l + r) >> 1)
#define mp make_pair
#define pb push_back
#define eb emplace_back
#define all(a) a.begin(),a.end()
#define debug(x) {cerr <<#x<<" = " <<x<<"\n"; }
#define debug2(x, y) {cerr <<#x<<" = " <<x<<", "<<#y <<" = " <<y <<"\n";}
#define debug3(x, y, z) {cerr <<#x<<" = " <<x<<", "<<#y <<" = " <<y <<", "<<#z<<" = "<<z<<"\n";}
#define debug4(x, y, z, w) {cerr <<#x<<" = " <<x<<", "<<#y <<" = " <<y <<", "<<#z<<" = "<<z<<", "<<#w << " = " <<w <<"\n";}
#define ss second
#define ff first
#define m0(x) memset(x,0,sizeof(x))
#define builtinpopcount __builtin_popcount(x)
inline int nextint(){ int x; scanf("%d",&x); return x; }
inline ll nextll() { ll x; scanf("%lld",&x); return x; }
#define gc getchar
template <typename T> void scanint(T &x) {
T c = gc(); while(((c < 48) || (c > 57)) && (c!='-')) c = gc();
bool neg = false; if(c == '-') neg = true; x = 0; for(;c < 48 || c > 57;c=gc());
for(;c > 47 && c < 58;c=gc()) x = (x*10) + (c - 48); if(neg) x = -x;
}
// variadics
template<typename T >T min_ ( T a , T b ) { return a > b ? b : a ; }
template < typename T , typename... Ts > T min_( T first , Ts... last ){ return min_(first, min_(last...)); }
// lambda exp auto square = [](int inp) { return inp * inp; } ;
template<class T, class S> std::ostream& operator<<(std::ostream &os, const std::pair<T, S> &t) {
os<<"("<<t.first<<", "<<t.second<<")";
return os;
}
template<typename T> ostream& operator<< (ostream& out, const vector<T>& v) {
out << "["; size_t last = v.size() - 1; for(size_t i = 0; i < v.size(); ++i) {
out << v[i]; if (i != last) out << ", "; } out << "]"; return out;
}
ll pwr(ll base, ll p, ll mod){
ll ans = 1; while(p) { if(p&1) ans=(ans*base)%mod; base=(base*base)%mod; p/=2; } return ans;
}
ll gcd(ll a, ll b) { return b == 0 ? a : gcd(b,a%b); }
ll lcm(ll a, ll b) { return a*(b/gcd(a,b)); }
const long double PI = (long double)(3.1415926535897932384626433832795);
const ll mx_ll = numeric_limits<ll> :: max();
const int mx_int = numeric_limits<int> :: max();
const int mod = 1e9+7;
const int oo = 0x3f3f3f3f;
const ll OO = 0x3f3f3f3f3f3f3f3fll;
const ld TIME_LIMIT = 5.000001;
inline int break_TIME_LIMIT() { if(( 1.0 * clock() / CLOCKS_PER_SEC ) > TIME_LIMIT) return 1; else return 0; }
/* if(break_TIME_LIMIT())
break;
*/
const int maxn = 3e5+7;
vector<pii> upd;
const int BITS = 17;
int cnt[1<<BITS];
int dp[1<<BITS];
inline void update()
{
for(auto &i: upd)
cnt[i.ff] += i.ss;
for(int i = 0; i < (1<<BITS); i++)
dp[i] = cnt[i];
for(int i = 0; i < BITS; i++)
for(int mask = 0; mask < (1<<BITS); mask++)
if(mask & (1<<i))
dp[mask] += dp[mask^(1<<i)];
upd.clear();
}
inline int query(int s)
{
int ans = dp[s];
for(auto &i: upd)
if((i.ff & s) == i.ff)
{
ans += i.ss;
}
return ans;
}
int main()
{
ios_base::sync_with_stdio(false); cin.tie(0);
int q; cin >> q;
int SQRT = sqrt(q);
for(int i = 1; i <= q; i++)
{
if(i%SQRT == 0)
{
update();
}
string str; int S; cin >> str >> S;
if(str[0] == 'a')
upd.pb({S,1});
if(str[0] == 'd')
upd.pb({S,-1});
if(str[0] == 'c')
cout << query(S) << "\n";
}
return 0;
}