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;

// semi-open range add maximum query

struct RBAQ{
  int sst[1<<18];
  int adt[1<<18];
  RBAQ(){
    memset(sst,0,sizeof(sst));
    memset(adt,0,sizeof(adt));
  }
  void add(int p, int q, int x, int k=0, int l=0, int r=(1<<17)){
    if(r <= p || q <= l) return;
    if(p <= l && r <= q){
      adt[k] += x;
      return;
    }
    add(p, q, x, 2*k+1, l, (l+r)/2);
    add(p, q, x, 2*k+2, (l+r)/2, r);
    sst[k]=max(sst[2*k+1]+adt[2*k+1],sst[2*k+2]+adt[2*k+2]);
  }
  int find(int p, int q, int k=0, int l=0, int r=(1<<17)){
    if(r <= p || q <= l) return 0;
    if(p <= l && r <= q) return sst[k]+adt[k];
    int m1, m2;
    m1 = find(p,q,2*k+1,l,(l+r)/2);
    m2 = find(p,q,2*k+2,(l+r)/2,r);
    return max(m1,m2)+adt[k];
  }
};

int main(){
  RBAQ a;
  int c,x,y,n,q;
  cin>>n>>q;
  for(int i=0;i<q;i++){
    cin>>c;
    if(!c){
      cin>>x>>y>>c;
      a.add(x,y+1,c);
    }
    else{
      cin>>x;
      cout<<a.find(x,x+1)<<endl;
    }
  }
}