#include <iostream>
#include <cstdio>
using namespace std;
int m,n,aib[100002];

int nrZerouri(int x)
{
    return x&(x^(x-1));
}

void inserare(int poz,int nr)
{
    for(int i=poz;i<=n;i+=nrZerouri(i))
        aib[i]+=nr;
}

void citire()
{
    int x;
    scanf("%d%d",&m,&n);
    for(int i=1;i<=m;i++)
        {
            scanf("%d", &x);
            inserare(i,x);
        }
}
void update(int poz,int nr)
{
    for(int i=poz;i<=n;i+=nrZerouri(i))
        aib[i]-=nr;
}
int getSum(int poz)
{
    int suma=0;
    for(int i=poz;i>=1;i-=nrZerouri(i))
        suma+=aib[i];
    return suma;
}

int main()
{
    freopen("datorii.in","r",stdin);
    freopen("datorii.out","w",stdout);
    citire();
    int x,y,z;
    for(int i=1;i<=n;i++)
    {
        scanf("%d%d%d",&x,&y,&z);
        if(x)
        {
            printf("%d\n",getSum(z)-getSum(y-1));
        }
        else
        {
            update(y,z);
        }
    }
    return 0;
}