This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include<bits/stdc++.h>
using namespace std;
const int N=1e6+5;
const int K=1<<21;
const int INF=INT_MAX/2;
int n,m,b,p;
vector<tuple<int,int,int,int,int>> obs;
vector<tuple<int,int,int>> event[N];
struct SegTree{
int t[K],lz[K];
void apply(int i,int v){
t[i]+=v,lz[i]+=v;
}
void push(int i){
apply(i*2,lz[i]);
apply(i*2+1,lz[i]);
lz[i]=0;
}
void build(int l,int r,int i){
t[i]=0,lz[i]=0;
if(l==r)return;
int m=(l+r)/2;
build(l,m,i*2);
build(m+1,r,i*2+1);
}
void build(){
build(1,n,1);
}
void update(int l,int r,int i,int x,int y,int v){
if(y<l||r<x)return;
if(x<=l&&r<=y)return apply(i,v);
int m=(l+r)/2;
push(i);
update(l,m,i*2,x,y,v);
update(m+1,r,i*2+1,x,y,v);
t[i]=min(t[i*2],t[i*2+1]);
}
void update(int x,int y,int v){
update(1,n,1,x,y,v);
}
int query(int l,int r,int i,int x,int y){
if(y<l||r<x)return INF;
if(x<=l&&r<=y)return t[i];
int m=(l+r)/2;
push(i);
return min(query(l,m,i*2,x,y),query(m+1,r,i*2+1,x,y));
}
int query(int x,int y){
return query(1,n,1,x,y);
}
}seg;
bool check(int k){
for(int i=1;i<=m;i++)event[i].clear();
for(auto [x1,y1,x2,y2,c]:obs){
event[max(x1,k)].emplace_back(max(y1,k),y2+k-1,c);
if(x2+k<=m)event[x2+k].emplace_back(max(y1,k),y2+k-1,-c);
}
seg.build();
seg.update(1,k-1,INF);
bool upd=true;
for(int i=k;i<=m;i++){
for(auto [l,r,v]:event[i]){
seg.update(l,r,v);
upd=true;
}
if(upd&&seg.t[1]<=b)return true;
upd=false;
}
return false;
}
int main(){
cin.tie(nullptr)->sync_with_stdio(false);
cin >> m >> n >> b >> p;
obs.resize(p);
for(auto &[x1,y1,x2,y2,c]:obs)cin >> x1 >> y1 >> x2 >> y2 >> c;
int l=0,r=min(n,m);
while(l<r){
int m=(l+r+1)/2;
if(check(m))l=m;
else r=m-1;
}
cout << l;
}
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