Problem: Write a program which manipulates a sequence A = {a1, a2, . . . , an} with the following operations:

* add(s, t, x): add x to as, as+1, ..., at.
* get(i): output the value of ai.



Note that the initial values of ai (i = 1, 2, . . . , n) are 0.

Constraints

* 1 ≤ n ≤ 100000
* 1 ≤ q ≤ 100000
* 1 ≤ s ≤ t ≤ n
* 1 ≤ i ≤ n
* 0 ≤ x ≤ 1000

Input


n q
query1
query2
:
queryq


In the first line, n (the number of elements in A) and q (the number of queries) are given. Then, ith query queryi is given in the following format:


0 s t x


or


1 t


The first digit represents the type of the query. '0' denotes add(s, t, x) and '1' denotes get(i).

Output

For each get operation, print the value.

Examples

Input

3 5
0 1 2 1
0 2 3 2
0 3 3 3
1 2
1 3


Output

3
5


Input

4 3
1 2
0 1 4 1
1 2


Output

0
1

Solution (in CPP):

Solution:
#include<bits/stdc++.h>
#define rep(i,n)for(int i=0;i<(n);i++)
using namespace std;

int bit[100001], n, q;
void add(int k, int x) {
	while (k <= n) {
		bit[k] += x;
		k += k&-k;
	}
}
int sum(int k) {
	int res = 0;
	while (k > 0) {
		res += bit[k];
		k -= k&-k;
	}
	return res;
}
int main() {
	scanf("%d%d", &n, &q);
	rep(i, q) {
		int a; scanf("%d", &a);
		if (a) {
			int b; scanf("%d", &b);
			printf("%d\n", sum(b));
			continue;
		}
		int s, t, x; scanf("%d%d%d", &s, &t, &x); t++;
		add(s, x); add(t, -x);
	}
}