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Cod sursa(job #541396)
#include<fstream>
using namespace std;
long op, x,v[1000001],n,contor=0;
ifstream f("hashuri.in");
ofstream g("hashuri.out");
int gasire(int x)
{
int i;
for(i=1;i<=contor;i++)
if (v[i]==x)
return i;
else return 0;
}
void adauga(int x)
{
contor++;
v[contor]=x;
}
void sterge(int x)
{
int j,p;
p=gasire(x);
if (p!=0)
for(j=p;p<=contor;p++)
v[j]=v[j+1];
contor--;
}
int main()
{
int i;
f>>n;
for(i=1;i<=n;i++)
{
f>>op>>x;
if (op==1 && !gasire(x))
adauga(x);
else if (op==2)
sterge(x);
else if(op==3 )
if (gasire(x))
g<<1<<"\n";
else g<<0<<"\n";
}
f.close();
g.close();
return 0;
}