#include <fstream>

#define Ndim 100001
#define zeros(x) x&(-x)
using namespace std;
ifstream fin("aib.in");
ofstream fout("aib.out");
int AIB[Ndim];
void update(int val,int i,int n)
{
    for(i;i<=n;i+=zeros(i))
        AIB[i]+=val;
}
int query(int i)
{
    int sol = 0;
    for(i;i>0;i-=zeros(i))
        sol+=AIB[i];
    return sol;
}
int binsrch(int val,int n)
{
    int st=1,dr = n,mid;
    while(st<=dr)
    {
        mid = (st+dr)/2;
        int nr = query(mid);
        if(nr < val)
            st = mid+1;
        else if(nr> val)
            dr = mid-1;
        else
            return mid;
    }
    return -1;
}
int main()
{
    int n,m,x,t,a,b,v,i;
    fin>>n>>m;
    for(i=1;i<=n;i++)
    {
        fin>>x;
        update(x,i,n);
    }
    for(i=1;i<=m;i++)
    {
        fin>>t;
        if(t==0)
        {
            fin>>a>>b;
            update(b,a,n);
        }
        else if(t==1)
        {
            fin>>a>>b;
            fout<<query(b)-query(a-1)<<'\n';
        }
        else
        {
            fin>>v;
            fout<<binsrch(v,n)<<'\n';
        }
    }
    return 0;
}