#include<cstdio>
#define aibSize 100001
using namespace std;

int aib[aibSize], n;

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

}

int suma(int x)
{
    int s = 0;
    while(x)
    {
        s += aib[x];
        x &= x-1;
    }
    return s;
}

int BSearch(int x)
{
    int left, right, mid, sum;
    left = 1; right = n;
    while(left <= right)
    {
        mid = (left+right)>>1;
        sum = suma(mid);
        if(sum == x) return mid;
        else if(sum < x) left = mid+1;
        else right = mid-1;
    }
    return -1;
}

int main()
{
    int i, m, x, nr, a, b;
    FILE *fin, *fout;
    fin = fopen("aib.in","r");
    fout = fopen("aib.out","w");
    fscanf(fin,"%d%d",&n,&m);
    for(i=1; i<=n; i++)
    {
        fscanf(fin,"%d",&x);
        updateAib(x,i);
    }
    for(i=1; i<=m; i++)
    {
        fscanf(fin,"%d",&nr);
        if(!nr)
        {
            fscanf(fin,"%d%d",&a,&b);
            updateAib(b,a);
        }
        else if(nr == 1)
        {
            fscanf(fin,"%d%d",&a,&b);
            fprintf(fout,"%d\n",suma(b)-suma(a-1));
        }
        else
        {
            fscanf(fin,"%d",&a);
            fprintf(fout,"%d\n",BSearch(a));
        }
    }
    fclose(fin);
    fclose(fout);
    return 0;
}