#include<bits/stdc++.h>
#define ll long long
using namespace std;
#define left(i) (2*i + 1)
#define right(i) (2*i + 2)
#define parent(i) ((i-1)/2)
#include <vector>

template<class T>
class SegmentTree
{
    public:
        SegmentTree(std::vector<T> data, T value, T (*combine)(T obj1, T obj2));
        SegmentTree(T ar[], int n, T value, T (*combine)(T obj1, T obj2));
        T query(int l, int r);
        void update(int idx, T val);
        //TODO lazy propagation
    private:
        T *tree;
        void buildTree(std::vector<T> data);
        int segTreeSize;
        T valueForExtraNodes;
        T (*combine)(T obj1, T obj2);
        int calculateSize(int n);
        T queryHelper(int l,int r, int st, int ed, int node);
};

template<class T> SegmentTree<T>::SegmentTree(std::vector<T> data,
                                                T value, T (*combine)(T obj1, T obj2))
{
   this->combine = combine;
   valueForExtraNodes = value;
   segTreeSize = calculateSize(data.size());
   buildTree(data);
}

template<class T> SegmentTree<T>::SegmentTree(T ar[], int n,
                                            T value, T (*combine)(T obj1, T obj2))
{
   this->combine = combine;
   valueForExtraNodes = value;
   segTreeSize = calculateSize(n);

   std::vector<T> data;
   for(int i = 0; i < n; i++)
         data.push_back(ar[i]);

   buildTree(data);
}


template<class T> int SegmentTree<T>::calculateSize(int n)
{
    int pow2 = 1;
    while( pow2 < n)
    {
        pow2 = pow2 << 1;
    }
    return 2*pow2 - 1;
}

template<class T> T SegmentTree<T>::query(int l, int r)
{
    int st = 0, ed = segTreeSize/2;
    return queryHelper(l, r, st, ed, 0);
}

template<class T> T SegmentTree<T>::queryHelper(int l,int r, int st, int ed, int node)
{
    if( (r < st) || (l > ed) || (l > r) )
        return valueForExtraNodes;
    if(st >= l && ed <= r)
        return tree[node];
    T leftVal = queryHelper(l, r, st, (st + ed)/2, left(node));
    T rightVal = queryHelper(l, r, (st+ed)/2 + 1, ed, right(node));
    return combine(leftVal, rightVal);
}

template<class T> void SegmentTree<T>::buildTree(std::vector<T> data)
{
   int n = data.size();
   tree = new T[segTreeSize];
   int extraNodes = (segTreeSize/2 + 1) - n;
   for(int i = segTreeSize - 1; i >= 0; i--)
   {
       if(extraNodes>0)
           {
               tree[i] = valueForExtraNodes;
               extraNodes--;
           }
       else if(n>0)
           {
               tree[i] = data[n-1];
               n--;
           }
       else
           tree[i] = combine(tree[left(i)], tree[right(i)]);
   }
}

template<class T> void SegmentTree<T>::update(int idx, T val)
{
    int segTreeIdx = (segTreeSize/2) + idx;
    tree[segTreeIdx] = val;
    while(parent(segTreeIdx) >= 0)
    {
        segTreeIdx = parent(segTreeIdx);
        if(right(segTreeIdx) < segTreeSize)
          tree[segTreeIdx] = combine(tree[left(segTreeIdx)], tree[right(segTreeIdx)]);
        if(segTreeIdx == 0)
            break;
    }
}

ll sum(ll x,ll y) { return x+y; }
int main()
{
    int n,q;
    cin>>n>>q;
    vector<ll> v(n), zero(n,0);
    for(int i=0;i<n;i++)
        cin >> v[i];
    SegmentTree<ll> rangeSumQueries(zero, 0, sum);
    while(q--)
    {
        int t,l,r,u;
        cin >> t;
        if(t==1)
        {
            cin >> l >> r>> u;
            ll actual_val_l = rangeSumQueries.query(l-1,l-1);
            ll actual_val_r = rangeSumQueries.query(r,r);
            rangeSumQueries.update(l-1,actual_val_l + u);
            rangeSumQueries.update(r,actual_val_r - u);
        }
        else
        {
            cin >> u;
            cout<<v[u-1] + rangeSumQueries.query(0,u-1)<<'\n';
        }
    }
    return 0;
}