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>
using namespace std;
const int maxn=100005;

int S[maxn];
int n,q;

int main() {
	cin>>n>>q;
	for (int i=0;i<q;i++) {
		bool op; cin>>op;
		if (op) {
			int k; cin>>k;
			int ans=0;
			for (int i=k;i>0;i-=i&-i)
				ans+=S[i];
			cout<<ans<<'\n';
		}
		else {
			int s,t,x; cin>>s>>t>>x;
			for (int i=s;i<=n;i+=i&-i)
				S[i]+=x;
			for (int i=t+1;i<=n;i+=i&-i)
				S[i]+=-x;
		}
	}
}