Toorcmmdc

#include<bits/stdc++.h>
using namespace std;
const int maxi=300;
unordered_map<int,int> len,gcdv;
unordered_multiset<int> bucket[maxi*5];
unordered_multiset<int>::iterator it;
ifstream in("toorcmmdc.in");
ofstream out("toorcmmdc.out");

void solve(int l)
{
    int gcd=-1;
    for(int i=1;i<=l;i++)
        if(gcdv[i]!=-1)
            if(gcd!=-1)
                gcd=__gcd(gcd,gcdv[i]);
            else
                gcd=gcdv[i];
    if(gcd==-1)
        gcd=1;
    out<<gcd<<'\n';
}

int update(unordered_multiset<int> &v)
{
    if(!v.size())
        return -1;
    int gcd=*v.begin();
    for(auto i:v)
        gcd=__gcd(gcd,i);
    return gcd;
}

int main()
{
    char c;
    int n,x,l=0;
    in>>n;
    for(int i=1;i<=n;i++)
    {
        in>>c>>x;
        if(c=='+')
        {
            if(l==0 || len[l]==300)
            {
                l++;
                gcdv[l]=x;
                len[l]=1;
                bucket[l].insert(x);
            }
            else
            {
                if(len[l])
                    gcdv[l]=__gcd(gcdv[l],x);
                else
                    gcdv[l]=x;
                len[l]++;
                bucket[l].insert(x);
            }
            solve(l);
        }
        else
        {
            for(int j=1;j<=l;j++)
            {
                it=bucket[j].find(x);
                if(bucket[j].find(x)!=bucket[j].end())
                {
                    bucket[j].erase(it);
                    len[j]--;
                    gcdv[j] = update(bucket[j]);
                    break;
                }
            }
            solve(l);
        }
    }
    return 0;
}