#include <fstream>
#include <iostream>
#include <vector>
using namespace std;
ifstream fin("date.in");
ofstream fout("date.out");
#define fin cin
#define fout cout
int n, m;
vector<int> v;
void add(int x, int y)
{
    for (int i = x; i <= n; i += (i & -i))
    {
        v[i] += y;
    }
}
int sum(int x)
{
    int cnt = 0;
    for (int i = x; i >= 1; i -= (i & -i))
    {
        cnt += v[i];
    }
    return cnt;
}
int check(int k)
{
    for (int i = 1; i <= n; i++)
    {
        if (sum(i) == k)
        {
            return i;
        }
        else if (sum(i) > k)
        {
            return -1;
        }
    }
    return -1;
}
int main()
{
    fin >> n >> m;
    v.resize(n + 1);
    for (int i = 1; i <= n; i++)
    {
        int x;
        fin >> x;
        add(i, x);
    }
    for (int i = 0; i < m; i++)
    {
        int a;
        fin >> a;
        if (a == 0)
        {
            int b, c;
            fin >> b >> c;
            add(b, c);
        }
        else if (a == 1)
        {
            int b, c;
            fin >> b >> c;
            fout << sum(c) - sum(b - 1) << '\n';
        }
        else
        {
            int b;
            fin >> b;
            fout << check(b);
            fout << '\n';
        }
    }
    return 0;
}