#include <fstream>
using namespace std;
ifstream cin("datorii.in");
ofstream cout("datorii.out");
#define zero(x)((x^(x-1))&x)
const int nmax=15000;
int n,m;
int v[nmax+5],aib[nmax+5];
void scade(int poz,int value)
{
    for(int i=poz;i<=n;i+=zero(i))
        aib[i]-=value;
}
int prefix(int poz)
{
    int ans=0;
    for(int i=poz;i>=1;i-=zero(i))
        ans+=aib[i];
    return ans;
}
int main()
{
    cin>>n>>m;
    for(int i=1;i<=n;i++)
    {
        cin>>v[i];
        scade(i,-v[i]);
    }
    for(int i=1;i<=m;i++)
    {
        int tip,a,b;
        cin>>tip>>a>>b;
        if(tip==0)
            scade(a,b);
        else
            cout<<prefix(b)-prefix(a-1)<<"\n";
    }
    return 0;
}
/**
schimb 1
[1,1]
[1,2]
[3,3]
[1,4]
[5,5]
[4,6]
[7,7]
[1,8]
**/