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

ifstream in ("datorii.in");
ofstream out ("datorii.out");

int n,m;
vector <int> aib;

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

int ps(int a)
{
    int sum=0;
    while (a>0)
    {
        sum+=aib[a];
        a-=(a&-a);
    }
    return sum;
}

int rangeSum(int a, int b)
{
    return ps(a)-ps(b);
}

int main()
{
    in>>n>>m;
    aib.push_back(0);
    for (int i=0; i<n; i++)
    {
        int a;
        in>>a;
        aib.push_back(a);
    }
    for (int i=0; i<m; i++)
    {
        int c,x,y;
        in>>c>>x>>y;
        if (!c)
        {
            update(x,y);
            continue;
        }
        out<<rangeSum(x,y)<<endl;
    }
    return 0;
}