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 <iostream>
using namespace std;
int dp[200000],n,q,a,b,c;
void BITadd(int a,int b){
    while(a>0){
        dp[a]+=b;
        a-=a&(-a);
    }
    return ;
}
int BITget(int a){
    int tot=0;
    while(a<=200000){
        tot+=dp[a];
        a+=a&(-a);
    }
    return tot;
}
int main(void){
    cin>>n>>q;
    while(q--){
        cin>>a;
        if(a==0){
            cin>>a>>b>>c;
            BITadd(b,c);
            BITadd(a-1,-c);
        }
        else{
            cin>>a;
            cout<<BITget(a)<<endl;
        }
    }
}