#include <fstream>
#include <cmath>
using namespace std;

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

int n,m,v[100005],i,a,b,c,C,S;

void adauga(int poz,int val)
{
    C = 0;
     while ( poz <= n )
     {
           v[poz] += val;
           while ( !(poz & (1<<C)) ) C++;
           poz += (1<<C);
           C += 1;
     }
}

int suma(int poz)
{
    C = 0, S = 0;
    while ( poz > 0 )
    {
          S += v[poz];
          while ( !(poz & (1<<C)) ) C++;
          poz -= (1<<C);
          C += 1;
    }

    return S;
}

int cauta(int val)
{
    int i, step;

    for ( step = 1; step < n; step <<= 1 );

    for( i = 0; step; step >>= 1 )
    {
         if( i + step <= n)
         {
            if( val >= v[i+step] )
            {
                i += step, val -= v[i];
                if ( !val ) return i;
            }
         }
    }

    return -1;
}

int main()
{
    f>>n>>m;
    for(i=1;i<=n;i++)
        f>>a,adauga(i,a);

    while(m)
    {
        f>>a;
        if(a==0)
            f>>b>>c,adauga(b,c);
        else
        if(a==1)
            f>>b>>c,g<<suma(c)-suma(b-1)<<'\n';
        else
            f>>b,g<<cauta(b)<<'\n';
        m--;
    }

    return 0;
}