/* In the name of God, aka Allah */
// let this be mytemp.cpp
#include<bits/stdc++.h>
using namespace std;
#define F first
#define S second
#define endl '\n'
#define mk make_pair
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
const int N = 2.5e5+50;
ll n, m, q, pt[N], sm[N];
vector<pll> vc[N];
void join(int l, int r, int c, ll k) {
for (int i = l; i <= r; i++) {
vc[i].push_back({c, k});
sm[i] += k;
}
}
void leave(int l, int r, ll k) {
for (int i = l; i <= r; i++) {
pt[i] += k;
pt[i] = min(pt[i], sm[i]);
}
}
ll service(int id, ll x) {
ll t = 0;
for (pll p:vc[id]) {
t += p.S;
if (t >= x+pt[id]) return p.F;
}
return 0;
}
void solve() {
cin >> n >> m >> q;
for (int i = 1; i <= q; i++) {
ll t, l, r, c, k, id, x;
cin >> t;
if (t == 1) {
cin >> l >> r >> c >> k;
join(l, r, c, k);
}
if (t == 2) {
cin >> l >> r >> k;
leave(l, r, k);
}
if (t == 3) {
cin >> id >> x;
cout << service(id, x) << endl;
}
}
}
int main() {
ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);
solve();
return 0;
}
