Lightoj-solution/lightoj 1087.cpp at master · AshrafulHaqueToni/Lightoj-solution · GitHub

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#include<bits/stdc++.h>
using namespace std;

#define mx 150005

struct me
{
    int pos;
} tree[4*mx],dummy;


int a[mx];


me Merge(me p1,me p2)
{
    me re;
    re.pos = p1.pos+p2.pos;
    return re;
}

void built(int node,int be,int en)
{
    if(be>en)
        return;

    if(be==en)
    {
        tree[node].pos=1;
        return;
    }

    int mid=(be+en)/2;

    built(node*2,be,mid);
    built(node*2+1,mid+1,en);

    tree[node]=Merge(tree[node*2],tree[node*2+1]);
}

me query(int node,int be,int en,int i,int j)
{
    if(i>en||j<be)
        return dummy;

    if(i<=be&&j>=en)
    {
        return tree[node];
    }

    int mid=(be+en)/2;

    me p1,p2;

    p1=query(node*2,be,mid,i,j);
    p2=query(node*2+1,mid+1,en,i,j);

    return Merge(p1,p2);

}

void update(int node,int be,int en,int po,int val)
{
    if(be>po||en<po)
        return;

    if(be>=po&&en<=po)
    {

        tree[node].pos=val;

        return;
    }

    int mid=(be+en)/2;

    update(node*2,be,mid,po,val);
    update(node*2+1,mid+1,en,po,val);

    tree[node]=Merge(tree[node*2],tree[node*2+1]);
}


int main()
{
    //freopen("inputt.txt","r",stdin);
    int t;
    scanf("%d",&t);

    for(int ii=1; ii<=t; ii++)
    {
        int n,q;

        scanf("%d %d",&n,&q);

        for(int i=1; i<=n; i++)
            scanf("%d",a+i);

        int fix=2*n;

        built(1,1,fix);

        printf("Case %d:\n",ii);

//         for(int i=0;i<=4*n;i++)cout<<tree[i].pos<<" ";
//                cout<<endl;

        while(q--)
        {
            char c;

            int pos;

            scanf(" %c",&c);

            if(c =='c')
            {
                scanf("%d",&pos);

                int lo=1,hi=n;


                int ans=0;

                while(lo<=hi)
                {
                    int mid=(lo+hi)/2;

                    me fi;

                    fi=query(1,1,fix,1,mid);

                    int val=fi.pos;

                    if(val>=pos)
                    {
                        ans=mid;
                        hi=mid-1;

                    }
                    else
                        lo=mid+1;

                    //cout<<ans<<" ";
                }

//                   for(int i=0;i<=4*n;i++)cout<<tree[i].pos<<" ";
//                cout<<endl;

                if(ans)
                {

                    printf("%d\n",a[ans]);

                    update(1,1,fix,ans,0);
                }
                else
                    printf("none\n");

//                 for(int i=0;i<=4*n;i++)cout<<tree[i].pos<<" ";
//                cout<<endl;

            }

            else
            {
                int val;
                scanf("%d",&val);

                n++;
                a[n]=val;

//                 for(int i=0;i<=4*n;i++)cout<<tree[i].pos<<" ";
//                cout<<endl;

                update(1,1,fix,n,1);

//                 for(int i=0;i<=4*n;i++)cout<<tree[i].pos<<" ";
//                cout<<endl;
            }

        }

//        for(int i=0; i<=n*4; i++)
//            tree[i].pos=0;

    }
}