#include 
#include 
#include 
using namespace std;
typedef long long ll;
const int maxn = 2e5 + 10;
int a[maxn];
ll segment_tree[3 * maxn];
ll lazy_propagation[3 * maxn];

void build_tree(int L, int R, int position) {
    if(L == R) {
        segment_tree[position] = a[L];
    }
    else {
        int middle = (L + R) / 2;
        build_tree(L, middle, 2 * position);
        build_tree(middle + 1, R, 2 * position + 1);
        segment_tree[position] = segment_tree[2 * position] + segment_tree[2 * position + 1];
    }
}

void update_range(int L, int R, int position, ll i, ll j, int new_value) {
    if(lazy_propagation[position] > 0) {
        segment_tree[position] += lazy_propagation[position] * (R - L + 1);
        if(L != R) {
            lazy_propagation[2 * position] += lazy_propagation[position];
            lazy_propagation[2 * position + 1] += lazy_propagation[position];
        }
        lazy_propagation[position] = 0;
    }
    // L R i L R j L R
    if(R < i or j < L) {
        return;
    }
    if(i <= L and R <= j) {
        segment_tree[position] += new_value * (R - L + 1);
        if(L != R) {
            lazy_propagation[2 * position] += new_value;
            lazy_propagation[2 * position + 1] += new_value;
        }
        return;
    }
    int middle = (L + R) / 2;
    update_range(L, middle, 2 * position, i, j, new_value);
    update_range(middle + 1, R, 2 * position + 1, i, j, new_value);
    segment_tree[position] = segment_tree[2 * position] + segment_tree[2 * position + 1];
}
ll query(int L, int R, int position, ll i, ll j) {
    if(lazy_propagation[position] > 0) {
        segment_tree[position] += lazy_propagation[position] * (R - L + 1);
        if(L != R) {
            lazy_propagation[2 * position] += lazy_propagation[position];
            lazy_propagation[2 * position + 1] += lazy_propagation[position];
        }
        lazy_propagation[position] = 0;
    }
    //  L R i L R j L R
    if(i <= L and R <= j) {
        return segment_tree[position];
    }
    if(R < i or j < L) {
        return 0;
    }
    int middle = (L + R) / 2;
    return query(L, middle, 2 * position, i, j) + query(middle + 1, R, 2 * position + 1, i, j);
}
int main() {
    ios_base::sync_with_stdio(false);
    int n;
    cin >> n;
    int q;
    cin >> q;
    for(int i = 0; i < n; i++) {
        cin >> a[i];
    }
    build_tree(0, n - 1, 1);
    memset(lazy_propagation, 0, sizeof lazy_propagation);
    
    
    for(int i = 0; i < q; i++) {
        int c;
        cin >> c;
        if(c == 1) {
            int a, b, x;
            cin >> a >> b >> x;
            update_range(0, n - 1, 1, a - 1, b - 1, x);
           
        }
        else {
            int k;
            cin >> k;
            cout << query(0, n - 1, 1, k - 1, k - 1) << "\n";
        }
    }
    return 0;
}