#include<bits/stdc++.h>
#define MASK(i) (1 << (i))
#define pub push_back
#define all(v) v.begin(), v.end()
#define compact(v) v.erase(unique(all(v)), end(v))
#define pii pair<int,int>
#define fi first
#define se second
#define endl "\n"
#define sz(v) (int)(v).size()
#define dbg(x) "[" #x " = " << (x) << "]"
using namespace std;
template<class T> bool minimize(T& a, T b){if(a > b) return a = b, true;return false;}
template<class T> bool maximize(T& a, T b){if(a < b) return a = b, true;return false;}
typedef long long ll;
typedef long double ld;
mt19937_64 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
ll rand(ll l, ll r){return uniform_int_distribution<ll>(l, r)(rng);}
const int N = 1e6 + 15;
const int limit = 1e8;
const int INF = 1e9;
struct node{
int type, x, time, id;
node() {}
node(int type, int x, int time, int id) : type(type), x(x), time(time), id(id) {}
};
int n, k, q, m;
vector<node> evt;
vector<int> compress;
multiset<int> ms[N];//current max for position l
multiset<int> coord[N];//lists of coordinates of type t
namespace SMT{
int st[N << 2];
int idNode[N];
void build(int l = 0, int r = m, int id = 1){
if(l == r) return void(idNode[l] = id);
int mid = (l+r) >> 1;
build(l, mid, id<<1);
build(mid+1, r, id<<1|1);
}
void update(int pos){
int id = idNode[pos];
st[id] = (ms[pos].empty()) ? 0 : *ms[pos].rbegin();
while(id >>= 1){
st[id] = max(st[id<<1], st[id<<1|1]);
}
}
//max from 0 -> pos
int get(int pos, int l = 0, int r = m, int id = 1){
if(l == r) return st[id];
int mid = (l+r) >> 1;
if(pos <= mid) return get(pos, l, mid, id<<1);
return max(st[id<<1], get(pos, mid+1, r, id<<1|1));
}
}
int ans[N];
void solve(){
cin >> n >> k >> q;
compress.push_back(-INF); compress.push_back(INF);
for(int i = 1; i <= n; i++){
int x, t, l, r; cin >> x >> t >> l >> r;
evt.emplace_back(0, x, l, t);
evt.emplace_back(1, x, r+1, t);
compress.push_back(x);
}
for(int i = 1; i <= q; i++){
int x, y; cin >> x >> y;
evt.emplace_back(2, x, y, i);
}
sort(all(compress)); compact(compress);
sort(all(evt), [&](node a, node b){
return a.time == b.time ? a.type < b.type : a.time < b.time;
});
m = sz(compress);
for(int i = 1; i <= k; i++){
coord[i].insert(-INF); coord[i].insert(INF);
ms[0].insert(INF);
}
//for(int x : compress) cout << x << " ";
//cout << endl;
SMT::build();
SMT::update(0);
auto add = [&](int l, int r) -> void{
//cout << "add: " << l << " " << r << " ";
l = lower_bound(all(compress), l) - compress.begin();
ms[l].insert(r);
//cout << l << " " << r << endl;
SMT::update(l);
};
auto del = [&](int l, int r) -> void{
//cout << "del: " << l << " " << r << " ";
l = lower_bound(all(compress), l) - compress.begin();
//cout << l << " " << r << endl;
ms[l].erase(ms[l].find(r));
SMT::update(l);
};
auto update = [&](bool act, int x, int type) -> void{
//cout << (act ? "open" : "close") << " " << type << " " << x << endl;
if(act){
coord[type].insert(x);
auto id = coord[type].lower_bound(x);
int l = -INF, r = INF;
if(id != coord[type].begin()) l = *prev(id);
if(next(id) != coord[type].end()) r = *next(id);
del(l, r);
add(l, x);
add(x, r);
}
else{
auto id = coord[type].lower_bound(x);
int l = -INF, r = INF;
if(id != coord[type].begin()) l = *prev(id);
if(next(id) != coord[type].end()) r = *next(id);
coord[type].erase(id);
del(l, x);
del(x, r);
add(l, r);
}
};
auto query = [&](int x) -> int{
int l = 0, r = limit, res = -1;
while(l <= r){
int mid = (l+r) >> 1;
int boundL = max(1, x - mid), boundR = min(limit, x + mid);
boundL = lower_bound(all(compress), boundL) - compress.begin() - 1;
if(SMT::get(boundL) <= boundR){
res = mid;
r = mid -1;
}
else l = mid + 1;
}
return res;
};
for(auto [type, x, time, id] : evt){
if(type < 2){
//cout << "TIME: " << time << endl;
update(type ^ 1, x, id);
}
else{
//for(int i = 0; i < m; i++) cout << SMT::get(i) << " ";
//cout << endl;
ans[id] = query(x);
//return;
}
}
for(int i = 1; i <= q; i++) cout << ans[i] << endl;
}
signed main(){
ios_base::sync_with_stdio(NULL);
cin.tie(0); cout.tie(0);
#define task "task"
if(fopen(task".INP", "r")){
freopen(task".INP", "r", stdin);
freopen(task".OUT", "w", stdout);
}
int t; t = 1; //cin >> t;
while(t--) solve();
}
