#include<bits/stdc++.h>
using namespace std;
ifstream fin("datorii.in");
ofstream gout("datorii.out");
int n,m,w,a,l,k;
int b,aib[15001],x;

inline void u(int poz,int val)
{for(int i=poz; i<=n; i+=i&(-i))aib[i]+=val;
    return;}

int q(int poz)
{int sum=0;for(int i=poz; i>=1; i-=i&(-i))sum+=aib[i];
    return sum;
    //cout<<"VALEU";
    }

int main()
{fin>>n>>m;
    for(int i=1; i<=n; ++i)
    {fin>>x; u(i,x);}
    for(int i=1; i<=m; ++i)
    {fin>>w>>a>>b;
        if(w==0)u(a,(-b));
        //cout<<aib[i];
else gout<<q(b)+(-q(a-1))<<endl;}
    return 0;}