#include <bits/stdc++.h>

using namespace std;

ifstream in("aib.in");
ofstream out("aib.out");

const int dim = 100001;

int n, m, tree[dim], c, a, b;

inline int nr(int i)
{
    return (i & (-i));
}

int suma(int i)
{
    int s = 0;
    while(i > 0)
    {
        s += tree[i];
        i -= nr(i);
    }
    return s;
}

int add(int poz, int val)
{
    while(poz <= n)
    {
        tree[poz] += val;
        poz += nr(poz);
    }
}

int cauta(int s)
{
    int st, poz;
    for(st;st <= n;st <<= 1);
    for(poz = 0;st;st >>= 1)
    {
        if(poz + st <= n)
        {
            if(s >= tree[poz + st])
            {
                poz += st;
                s -= tree[poz];
                if(s == 0)  return poz;
            }
        }
    }
    return -1;
}

void read()
{
    in>>n>>m;
    int x;
    for(int i = 1;i <= n;i++)
    {
        in>>x;
        add(i, x);
    }
}

void solve()
{
    for(int i = 1;i <= m;i++)
    {
        in>>c;
        if(c == 0)
        {
            in>>a>>b;
            add(a, b);
        }
        if(c == 1)
        {
            in>>a>>b;
            out<<suma(b) - suma(a - 1)<<'\n';
        }
        if(c == 2)
        {
            in>>a;
            out<<cauta(a)<<'\n';
        }
    }
}

int main()
{
    read();
    solve();
    return 0;
}