#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
#define MASK(i) (1ULL << (i))
#define GETBIT(mask, i) (((mask) >> (i)) & 1)
#define ALL(v) (v).begin(), (v).end()
ll max(ll a, ll b){return (a > b) ? a : b;}
ll min(ll a, ll b){return (a < b) ? a : b;}
ll gcd(ll a, ll b){return __gcd(a, b);}
ll lcm(ll a, ll b){return a / gcd(a, b) * b;}
ll LASTBIT(ll mask){return (mask) & (-mask);}
int pop_cnt(ull mask){return __builtin_popcountll(mask);}
int ctz(ull mask){return __builtin_ctzll(mask);}
int logOf(ull mask){return 63 - __builtin_clzll(mask);}
mt19937_64 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
ll rngesus(ll l, ll r){return l + (ull) rng() % (r - l + 1);}
double rngesus_d(double l, double r){
double cur = rngesus(0, MASK(60) - 1);
cur /= MASK(60) - 1;
return l + cur * (r - l);
}
template <class T1, class T2>
bool maximize(T1 &a, T2 b){
if (a < b) {a = b; return true;}
return false;
}
template <class T1, class T2>
bool minimize(T1 &a, T2 b){
if (a > b) {a = b; return true;}
return false;
}
template <class T>
void printArr(T container, string separator = " ", string finish = "\n", ostream &out = cout){
for(auto item: container) out << item << separator;
out << finish;
}
template <class T>
void remove_dup(vector<T> &a){
sort(ALL(a));
a.resize(unique(ALL(a)) - a.begin());
}
#include "elephants.h"
int n, l;
vector<int> pos;
multiset<int> S;
void init(int N, int L, int X[]){
n = N, l = L;
pos.resize(n);
for(int i= 0; i< n; ++i) pos[i] = X[i];
for(int i: pos) S.insert(i);
}
int update(int i, int y){
S.erase(S.find(pos[i]));
pos[i] = y;
S.insert(pos[i]);
int ans = 0;
int j = 0;
while(true){
auto it = S.lower_bound(j);
if (it == S.end()) break;
j = *it;
j += l + 1;
ans++;
}
return ans;
}
// int main(void){
// ios::sync_with_stdio(0);cin.tie(0); cout.tie(0);
// clock_t start = clock();
// int n, l; cin >> n >> l;
// int x[n];
// for(int i= 0; i < n; ++i) cin >> x[i];
// init(n, l, x);
// int q; cin >> q;
// while(q--){
// int i, y; cin >> i >> y;
// cout << update(i, y) << "\n";
// }
// cerr << "Time elapsed: " << clock() - start << " ms\n";
// return 0;
// }
