#include <bits/stdc++.h>
using namespace std;
int n, opt, l, r, c;
int a[50004];
//块的大小、块的数量，第i个数所在的块、第i个块的左右端点、整个区间加法的标记
int SZ, CNT, ID[50004], L[1004], R[1004], lazy[1004];
void update(int l, int r, int c)
{
    if (ID[l] == ID[r])
    {
        for (int i = l; i <= r; i++)
            a[i] += c;
        return;
    }
    for (int i = l; i <= R[ID[l]]; i++)
        a[i] += c;
    for (int i = ID[l] + 1; i <= ID[r] - 1; i++)
        lazy[i] += c;
    for (int i = L[ID[r]]; i <= r; i++)
        a[i] += c;
}
int query(int r)
{
    return a[r] + lazy[ID[r]];
}
int main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);
    cin >> n;
    SZ = sqrt(n);
    for (int i = 1; i <= n; i++)
    {
        cin >> a[i];
        //1: [1, SZ], 2: [SZ + 1, 2SZ]
        ID[i] = (i - 1) / SZ + 1;
    }
    CNT = n / SZ + (n % SZ > 0);
    for (int i = 1; i <= CNT; i++)
    {
        L[i] = (i - 1) * SZ + 1;
        R[i] = i * SZ;
    }
    for (int i = 1; i <= n; i++)
    {
        cin >> opt >> l >> r >> c;
        if (opt == 0)
            update(l, r, c);
        else
            cout << query(r) << "\n";
    }
    return 0;
}