//#define _CRT_SECURE_NO_WARNINGS
#include <vector>
#include <string>
#include <iostream>
#include <algorithm>
#include <cmath>
#include <cstdio>
#include <cstdlib>
#include <fstream>
#include <map>
#include <set>
#include <queue>
#include <memory.h>
#include <time.h>
#include <iostream>
#include <string>
#include <cstring>
#include <vector>
#include <cmath>
#include <map>
#include <algorithm>
#include <cstdio>
#include <set>
#include <queue>
#include <cassert>
#include <climits>
#define sz(x) int((x).size())
#define FOR(i,a,b) for(ll(i) = (a); (i) <= (b); ++(i))
#define ROF(i,a,b) for(ll(i) = (a); (i) >= (b); --(i))
#define rep(i,n) for (int(i) = 0; (i) < (n); ++(i))
#define fe(i,a) for (ll(i) = 0; (i) < int((a).size()); ++(i))
#define C(a) memset((a),0,sizeof(a))
#define pb push_back
#define ppb pop_back
#define all(c) (c).begin(), (c).end()
#define sqr(a) (a)*(a)
#define mp(a,b) make_pair((a), (b))
#define X first
#define Y second
#define file freopen("input.txt","r",stdin)
#define file2 freopen("output.txt", "w",stdout)
#define text freopen("input.txt","r",stdin); freopen("output.txt", "w",stdout)
using namespace std;
typedef vector<int> vint;
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int, int> pii;
#include <iostream>
#include <cstdio>
#include <cstdlib>
#include <cmath>
#include <cstring>
#include <string>
#include <vector>
#include <climits>
#include <cassert>
#define y1 vamdlsfmvldf
using namespace std;
const int mod = 1000000007;
const int INF = 1000000000;
const int N = 1000005;
using namespace std;
int n;
int t[N];
ll sum (int r)
{
 ll result = 0;
 for (; r >= 0; r = (r & (r + 1)) - 1)
     result += t[r];
 return result;
}
void inc (int i, int delta)
{
 for (; i < n; i = (i | (i+1)))
     t[i] += delta;
}
ll sum (int l, int r){
 return sum (r) - sum (l - 1);
}
int main(){
 int q;
 scanf("%d %d", &n, &q);
 ++n;
 int dop1, dop2, dop3;
 char c;
 for(int i = 0; i < q; ++i){
     scanf("\n%c", &c);
     if(c == 'A'){
         scanf("%d %d %d", &dop1, &dop2, &dop3);
         inc(dop1, dop3);
         inc(dop2 + 1, -dop3);
     }
     else{
         scanf("%d", &dop1);
         printf("%I64d\n", sum(0, dop1));
     }
 }
 return 0;
}