#include <bits/stdc++.h>
using namespace std;
typedef int ll;
const ll maxn = 6e4 + 10;
const ll maxy = 1e8 + 10;
array<ll,4> stores[maxn];
vector<array<ll,4>> events[maxn];
pair<ll,ll> queries[maxn];
set<ll> evy;
ll res[maxn];
vector<vector<ll>> stx;
map<ll, ll> loc_id;
void update(ll type, ll id, ll left, ll right,ll x,ll val) {
if (x>right || x <left) return;
if (left == right){
stx[type][id] += val;
return;
}
ll mid = (left+right)/2;
if (x <= mid){
update(type, id*2, left, mid, x, val);
}
else{
update(type, id*2+1, mid+1, right, x, val);
}
stx[type][id] = stx[type][2*id] + stx[type][2*id+1];
}
ll get(ll type, ll id, ll left, ll right, ll l, ll r) {
if (stx[type][id] == 0 || l>right || r<left)
return -1;
if (left==right) return left;
ll mid = (left+right)/2;
ll res = get(type, 2*id+1, mid+1, right, l,r);
if (res != -1) return res;
return get(type, 2*id, left, mid, l,r);
}
int main() {
ll n,k,q; cin>>n>>k>>q;
vector<ll> locs;
for (ll i = 0;i<n;i++) {
ll x,t,s,e; cin>>x>>t>>s>>e;
stores[i] = {x,t-1,s,e};
locs.push_back(x);
}
for (ll i = 0; i < q; i++) {
ll l, y;
cin >> l >> y;
queries[i] = {l, y};
locs.push_back(l);
}
sort(locs.begin(),locs.end());
ll sz = locs.size();
stx.assign(k, vector<int>(4 * sz, 0));
for (ll i = 0;i<sz;i++) {
loc_id[locs[i]] = i;
}
for (ll i = 0; i < n; i++) {
auto [x, t, s, e] = stores[i];
ll xi = loc_id[x];
events[s].push_back({0, t, xi, -1});
events[e + 1].push_back({1, t, xi, -1});
evy.insert(s);
evy.insert(e+1);
}
for (ll i = 0; i < q; i++) {
auto [l, y] = queries[i];
ll li = loc_id[l];
events[y].push_back({2, -1, li, i});
evy.insert(y);
}
for (ll i: evy) {
auto evs = events[i];
for (auto [type, t, xi, qi] : evs) {
if (type == 0) {
update(t, 1, 0, sz,xi,1);
} else if (type == 1) {
update(t, 1, 0, sz,xi,-1);
} else {
ll maxx = -1;
for (ll j = 0; j < k; ++j) {
ll left = get(j,1,0,sz,0,xi);
ll right = get(j,1,0,sz,xi+1,sz);
if (left == -1 && right == -1) {
maxx = -1;
break;
}
ll dist = maxy;
if (left != -1)
dist = min(dist, abs(locs[xi] - locs[left]));
if (right != -1)
dist = min(dist, abs(locs[xi] - locs[right]));
maxx = max(maxx, dist);
}
res[qi] = maxx;
}
}
}
for (ll i = 0;i<q;i++){
cout<<res[i]<<endl;
}
}
