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36 lines (36 loc) · 690 Bytes
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11723.cpp
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36 lines (36 loc) · 690 Bytes
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#include<iostream>
#include<set>
using namespace std;
int main(){
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
int n,x;
cin>>n;
string s;
int bitsss=0;
while(n--){
cin>>s;
if(s=="add"){
cin>>x;
bitsss|=(1<<x);
}
if(s=="remove"){
cin>>x;
bitsss&=~(1<<x);
}
if(s=="check"){
cin>>x;
cout<<((bitsss&(1<<x))>0?1:0)<<"\n";
}
if(s=="toggle"){
cin>>x;
bitsss^=(1<<x);
}
if(s=="all"){
bitsss=(1<<21)-1;
}
if(s=="empty"){
bitsss=0;
}
}
}