This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
#include<bits/stdc++.h>
using namespace std;
const int N=1e6+5;
const int INF=INT_MAX/2;
int n,m,b,p;
vector<tuple<int,int,int>> add[N],del[N];
struct SegTree{
int n,log;
int t[2*N],lz[2*N];
void init(int _n){
n=_n;
log=32-__builtin_clz(n);
}
void apply(int i,int v){
t[i]+=v,lz[i]+=v;
}
void push(int i){
apply(i<<1,lz[i]);
apply(i<<1|1,lz[i]);
lz[i]=0;
}
void pull(int i){
t[i]=min(t[i<<1],t[i<<1|1]);
}
void build(){
for(int i=1;i<2*n;i++)t[i]=lz[i]=0;
}
void update(int l,int r,int v){
if(l>r)return;
l+=n-1,r+=n;
for(int i=log;i>=1;i--){
if(((l>>i)<<i)!=l)push(l>>i);
if(((r>>i)<<i)!=r)push((r-1)>>i);
}
for(int l2=l,r2=r;l2<r2;l2>>=1,r2>>=1){
if(l2&1)apply(l2++,v);
if(r2&1)apply(--r2,v);
}
for(int i=1;i<=log;i++){
if(((l>>i)<<i)!=l)pull(l>>i);
if(((r>>i)<<i)!=r)pull((r-1)>>i);
}
}
}seg;
inline bool check(int k){
seg.update(1,k-1,INF);
for(int i=1;i<k;i++)for(auto [l,r,v]:add[i])seg.update(max(l,k),min(r+k-1,n),v);
bool res=false;
for(int i=k;i<=m;i++){
for(auto [l,r,v]:add[i])seg.update(max(l,k),min(r+k-1,n),v);
for(auto [l,r,v]:del[i-k])seg.update(max(l,k),min(r+k-1,n),-v);
if(seg.t[1]<=b)res=true;
}
for(int i=m-k+1;i<=m;i++)for(auto [l,r,v]:del[i])seg.update(max(l,k),min(r+k-1,n),-v);
seg.update(1,k-1,-INF);
return res;
}
int main(){
cin.tie(nullptr)->sync_with_stdio(false);
cin >> m >> n >> b >> p;
for(int i=0;i<p;i++){
int x1,y1,x2,y2,c;
cin >> x1 >> y1 >> x2 >> y2 >> c;
add[x1].emplace_back(y1,y2,c);
del[x2].emplace_back(y1,y2,c);
}
seg.init(n);
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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