# | Time | Username | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
819221 | TS_2392 | Global Warming (CEOI18_glo) | C++14 | 51 ms | 4232 KiB |
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>
#define pb push_back
#define lwb lower_bound
#define all(x) (x).begin(), (x).end()
using namespace std;
const int N = 2e5 + 3;
int n, x, res, dp[N], a[N];
vector<int> lis;
int main(){
ios_base::sync_with_stdio(false);
cin.tie(NULL); cout.tie(NULL);
cin >> n >> x;
for(int i = 1; i <= n; ++i){
cin >> a[i];
int j = lwb(all(lis), a[i]) - lis.begin();
dp[i] = j + 1;
if(j == lis.size()) lis.pb(a[i]);
else lis[j] = a[i];
}
lis.clear();
for(int i = n; i >= 1; --i){
int j = lwb(all(lis), -a[i]) - lis.begin();
res = max(res, dp[i] + j);
j = lwb(all(lis), -a[i] - x) - lis.begin();
if(j == lis.size()) lis.pb(-a[i]- x);
else lis[j] = -a[i] - x;
}
cout << res;
return 0;
}
Compilation message (stderr)
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