#include <bits/stdc++.h>
using namespace std;
using ll = long long;
const int MxN = 200020;
int lis[MxN], lds[MxN], lds_size[MxN], lis_size[MxN], a[MxN];
signed main(int argc, char *argv[]) {
cin.tie(nullptr)->ios::sync_with_stdio(false);
int n, x;
cin >> n >> x;
for(int i=1; i<=n; ++i){
cin >> a[i];
}
int sz = 0;
for(int i=n; i>=1; --i){
int idx = lower_bound(lds, lds + sz, -a[i]) - lds;
if(idx == sz){
sz++;
}
lds[idx] = -a[i];
lds_size[i] = idx + 1;
}
sz = 0;
int res = 0;
for(int i=1; i<=n; ++i){
int idx = lower_bound(lis, lis + sz, a[i] + x) - lis;
res = max(res, lds_size[i] + idx);
idx = lower_bound(lis, lis + sz, a[i]) - lis;
if(idx == sz){
sz++;
}
lis[idx] = a[i];
lis_size[i] = sz;
}
cout << max(res, lis_size[n]) << "\n";
return ;
}
Compilation message
glo.cpp: In function 'int main(int, char**)':
glo.cpp:38:2: error: return-statement with no value, in function returning 'int' [-fpermissive]
38 | return ;
| ^~~~~~
