# include <fstream>
# define LSB(p) ((-p) & p)// formula pentru cel mai nesemnificativ bit de 1 al lui x
using namespace std;
ifstream f("aib.in");
ofstream g("aib.out");
int i,j,n,m,S,x,tip,a,b;
int AIB [100005];
inline void update (int val, int poz)
{
    for(int i=poz; i<=n; i+=LSB(i))
        AIB[i]+=val;
}
inline int suma (int poz)
{
    int sum=0;
    for (int i=poz; i>0; i-=LSB(i))
        sum+=AIB[i];
    return sum;
}
inline int cb (int S)
{
    int ci=1, cs=n, mij;
    while (ci<=cs)
    {
        mij=(ci+cs)/2;
        int var=suma(mij);
        if (var==S) return mij;
        else if (S<var) cs=mij-1;
                   else ci=mij+1;
    }
    return -1;
}
int main ()
{
    f>>n>>m;
    for (i=1; i<=n; ++i)
    {
        f>>x;
        update (x, i);
    }
    for (i=1; i<=m; ++i)
    {
        f>>tip;
        if (tip==0)
        {
            f>>a>>b; //se adauga b la a
            update (b, a);
            continue;
        }
        if (tip==1)
        {
            f>>a>>b; //suma din intervalul a-b
            g<<suma(b)-suma(a-1)<<"\n";
            continue;
        }
        if (tip==2)
        {
            f>>S;
            g<<cb(S)<<"\n";
        }
    }

    return 0;
}