#define DEBUG 0
#include <bits/stdc++.h>
using namespace std;
#if DEBUG
// basic debugging macros
int __i__,__j__;
#define printLine(l) for(__i__=0;__i__<l;__i__++){cout<<"-";}cout<<endl
#define printLine2(l,c) for(__i__=0;__i__<l;__i__++){cout<<c;}cout<<endl
#define printVar(n) cout<<#n<<": "<<n<<endl
#define printArr(a,l) cout<<#a<<": ";for(__i__=0;__i__<l;__i__++){cout<<a[__i__]<<" ";}cout<<endl
#define print2dArr(a,r,c) cout<<#a<<":\n";for(__i__=0;__i__<r;__i__++){for(__j__=0;__j__<c;__j__++){cout<<a[__i__][__j__]<<" ";}cout<<endl;}
#define print2dArr2(a,r,c,l) cout<<#a<<":\n";for(__i__=0;__i__<r;__i__++){for(__j__=0;__j__<c;__j__++){cout<<setw(l)<<setfill(' ')<<a[__i__][__j__]<<" ";}cout<<endl;}
// advanced debugging class
// debug 1,2,'A',"test";
class _Debug {
public:
template<typename T>
_Debug& operator,(T val) {
cout << val << endl;
return *this;
}
};
#define debug _Debug(),
#else
#define printLine(l)
#define printLine2(l,c)
#define printVar(n)
#define printArr(a,l)
#define print2dArr(a,r,c)
#define print2dArr2(a,r,c,l)
#define debug
#endif
// define
#define MAX_VAL 999999999
#define MAX_VAL_2 999999999999999999LL
#define EPS 1e-6
#define mp make_pair
#define pb push_back
// typedef
typedef unsigned int UI;
typedef long long int LLI;
typedef unsigned long long int ULLI;
typedef unsigned short int US;
typedef pair<int,int> pii;
typedef pair<LLI,LLI> plli;
typedef vector<int> vi;
typedef vector<LLI> vlli;
typedef vector<pii> vpii;
typedef vector<plli> vplli;
// ---------- END OF TEMPLATE ----------
struct event { int time,t,x; };
bool comp(event a,event b) {
if (a.time == b.time) return a.t < b.t;
else return a.time < b.time;
}
vi sorted;
vector<event> events;
multiset<int> stores[300000];
multimap<pii,int> M;
vpii tree[1 << 20];
int ans[300000];
int update(int s,int e,int as,int ae,int i,pii p) {
if (as > ae) return 0;
else if ((s > ae) || (e < as)) return 0;
else if ((s >= as) && (e <= ae)) {
tree[i].pb(p);
return 0;
}
int mid = (s+e) / 2;
update(s,mid,as,ae,2*i+1,p);
update(mid+1,e,as,ae,2*i+2,p);
return 0;
}
int query(int s,int e,int q,int i,pii p) {
if ((s > q) || (e < q)) return 0;
else if (s == e) {
tree[i].pb(p);
return 0;
}
int mid = (s+e) / 2;
query(s,mid,q,2*i+1,p);
query(mid+1,e,q,2*i+2,p);
tree[i].pb(p);
return 0;
}
int solve(int s,int e,int i) {
int j,k;
pii m = mp(-3e8,0);
sort(tree[i].begin(),tree[i].end());
for (j = 0; j < tree[i].size(); j++) {
if (tree[i][j].second >= 0) {
if (tree[i][j].second > m.second-(tree[i][j].first-m.first)) m = tree[i][j];
}
else ans[-tree[i][j].second-1] = max(ans[-tree[i][j].second-1],m.second-(tree[i][j].first-m.first));
}
m = mp(3e8,0);
for (j = tree[i].size()-1; j >= 0; j--) {
if (tree[i][j].second >= 0) {
if (tree[i][j].second > m.second-(m.first-tree[i][j].first)) m = tree[i][j];
}
else ans[-tree[i][j].second-1] = max(ans[-tree[i][j].second-1],m.second-(m.first-tree[i][j].first));
}
if (s != e) {
int mid = (s+e) / 2;
solve(s,mid,2*i+1),solve(mid+1,e,2*i+2);
}
return 0;
}
int main() {
int i;
int n,k,q;
int x,t,a,b,l,y;
scanf("%d %d %d",&n,&k,&q);
sorted.pb(0),sorted.pb(3e8);
for (i = 0; i < n; i++) {
scanf("%d %d %d %d",&x,&t,&a,&b);
events.pb((event){a,t,x});
events.pb((event){b+1,-t,x});
sorted.pb(a),sorted.pb(b+1);
}
sort(events.begin(),events.end(),comp);
sort(sorted.begin(),sorted.end());
sorted.resize(unique(sorted.begin(),sorted.end())-sorted.begin());
for (i = 0; i < k; i++) {
stores[i].insert(-3e8),stores[i].insert(3e8);
M.insert(mp(mp(0,6e8),0));
}
for (i = 0; i < events.size(); i++) {
events[i].time = lower_bound(sorted.begin(),sorted.end(),events[i].time)-sorted.begin();
if (events[i].t > 0) {
auto it = stores[events[i].t-1].lower_bound(events[i].x);
auto it2 = it;
it2--;
auto it3 = M.find(mp(*it+*it2,*it-*it2));
update(0,sorted.size()-2,it3->second,events[i].time-1,0,mp(*it+*it2,*it-*it2));
M.erase(it3);
M.insert(mp(mp(*it+events[i].x,*it-events[i].x),events[i].time));
M.insert(mp(mp(events[i].x+*it2,events[i].x-*it2),events[i].time));
stores[events[i].t-1].insert(events[i].x);
}
else {
auto it = stores[-events[i].t-1].lower_bound(events[i].x);
auto it2 = it;
it2--;
auto it3 = M.find(mp(*it+*it2,*it-*it2));
update(0,sorted.size()-2,it3->second,events[i].time-1,0,mp(*it+*it2,*it-*it2));
M.erase(it3);
it++,it2++;
it3 = M.find(mp(*it+*it2,*it-*it2));
update(0,sorted.size()-2,it3->second,events[i].time-1,0,mp(*it+*it2,*it-*it2));
M.erase(it3);
it2--;
M.insert(mp(mp(*it+*it2,*it-*it2),events[i].time));
stores[-events[i].t-1].erase(--it);
}
}
for (auto it = M.begin(); it != M.end(); it++) update(0,sorted.size()-2,it->second,sorted.size()-2,0,it->first);
M.clear();
for (i = 0; i < q; i++) {
scanf("%d %d",&l,&y);
int p = upper_bound(sorted.begin(),sorted.end(),y)-sorted.begin()-1;
query(0,sorted.size()-2,p,0,mp(2*l,-(i+1)));
}
solve(0,sorted.size()-2,0);
for (i = 0; i < q; i++) printf("%d\n",(ans[i] > 3e8) ? -1:ans[i]/2);
return 0;
}
