#include <bits/stdc++.h>
using namespace std;
#define int long long
#define ff first
#define ss second
set<pair<int, int>> restriction; // if "starts after a", has to "end after b" yk
int x, l;
void init(int32_t L, int32_t N, std::vector<long long> T, std::vector<int32_t> W, int32_t X, int32_t M, std::vector<int32_t> S)
{
restriction = {};
x = X; l = L;
vector<vector<pair<int, int>>> restrictions(M);// yes
vector<pair<int, int>> cur;
for (int i = 0; i < N; i++) if (W[i] > X) cur.push_back({ T[i], W[i] - X });
for (int i = 0; i < M-1; i++) {
sort(cur.begin(), cur.end());
vector<pair<int, int>> res;
const int T = cur.size();
for (int j = 0; j < T; j++)
res.push_back({ cur[j].ff + cur[j].ss * (S[i + 1] - S[i]), cur[j].ss });
for (int j = 0; j < T - 1; j++)
if (res[j].ff > res[j + 1].ff)
res[j + 1].ff = res[j].ff;
int p = -1;
for (int j = 0; j < T; j++) {
if(res[j].ff != p){
if(j + 1 == T || cur[j].ff != cur[j+1].ff){
p = res[j].ff;
restrictions[i].push_back({ cur[j].ff+1, res[j].ff }); //start, end
}
}
}
swap(res, cur);
}
for (int i = 0; i < M; i++) {
reverse(restrictions[i].begin(), restrictions[i].end());
for(auto x : restrictions[i]){
auto y = restriction.upper_bound({x.second, numeric_limits<long long>::max()});
if(y == restriction.begin()) {
if(restriction.size() && y->second <= x.first){
continue;
}
restriction.insert({x.second, x.first});
continue;
}
else y = prev(y);
int tt = x.first;
while(y != restriction.end() && y->first >= x.first){
tt = min(tt, y->second);
auto t = y;
if(t == restriction.begin()) t= restriction.end();
else t = prev(t);
restriction.erase(y);
y = t;
}
x.first = tt;
auto z = restriction.upper_bound({x.second, numeric_limits<long long>::max()});
if(z != restriction.end() && z->second <= x.first) continue;
restriction.insert({x.second, x.first});
}
}
set<pair<int,int>> bruh;
for(auto &x : restriction) bruh.insert({x.second, x.first});
restriction=bruh;
return;
}
long long arrival_time(long long Y)
{
auto yes = restriction.upper_bound(make_pair( Y, numeric_limits<long long>::max() ));
if(yes == restriction.begin()) yes = restriction.end();
else yes = prev(yes);
if (yes != restriction.end()) Y = max(Y, yes->second);
return Y + x * l;
}
