#include <bits/stdc++.h>

using namespace std;

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

const int nmax = 100005;
int n, aib[nmax], m;


void Update(int x, int p)
{
    while(p <= n)
    {
        aib[p] += x;
        p += (p & (-p));
    }
}

int Query(int p)
{
    int sum = 0;
    while(p >= 1)
    {
        sum += aib[p];
        p -= (p & (-p));
    }
    return sum;
}

int Cautbin(int x)
{
    int st = 1, dr = n, mij, poz = -1;
    while(st <= dr)
    {
        mij = (st + dr) / 2;
        if(aib[mij] >= x)
        {
            dr = mij - 1;
            if(aib[mij] == x)
                poz = mij;
        }
        else if(aib[mij] < x)
            st = mij + 1;
    }
    return poz;
}
void Solve()
{
    int i, x;
    fin >> n >> m;
    for(i = 1;i <= n;i++)
    {
        fin >> x;
        Update(x, i);
    }
    for(i = 1;i <= m;i++)
    {
        int a, b, op;
        fin >> op;
        if(op == 0)
        {
            fin >> a >> b;
            Update(b, a);
        }
        else if(op == 1)
        {
            fin >> a >> b;
            fout << Query(b) - Query(a - 1)<< "\n";
        }
        else if(op == 2)
        {
            fin >> x;
            fout << Cautbin(x) << "\n";
        }
    }
}

int main()
{
    Solve();
    return 0;
}