제출 #943617

#제출 시각아이디문제언어결과실행 시간메모리
943617MinbaevGlobal Warming (CEOI18_glo)C++17
100 / 100
52 ms7320 KiB
#include <bits/stdc++.h> #include <ext/pb_ds/assoc_container.hpp> #include <ext/pb_ds/tree_policy.hpp> #define pii pair<int,int> using namespace __gnu_pbds; using namespace std; #define pb push_back #define all(x) x.begin(),x.end() #define rall(x) x.rbegin(),x.rend() #define f first #define int long long #define s second #define pii pair<int,int> template<class T>bool umax(T &a,T b){if(a<b){a=b;return true;}return false;} template<class T>bool umin(T &a,T b){if(b<a){a=b;return true;}return false;} typedef tree<int, null_type, less_equal<int>, rb_tree_tag, tree_order_statistics_node_update> ordered_set; const int N = 1e6 + 5 ; const int inf = 1e17 + 7; const int mod = 1e9 + 7; int n,m,k; void solve(){ cin >> n >> m; vector<int>a(n + 1); for(int i = 0;i<n;i++){ cin >> a[i]; } vector<int>dp(n + 1),v(n + 1,-inf); for(int i = n - 1;i>=0;i--){ int it = upper_bound(all(v),a[i]) - v.begin() - 1; v[it] = a[i]; if(i > 0){ dp[i - 1] = v.end() - upper_bound(all(v), a[i - 1] - m); } } int ans = v.end() - upper_bound(all(v), -inf + 1); for(int i = 0;i<n;i++){ v[i] = inf; } for(int i = 0;i<n - 1;i++){ int it = lower_bound(all(v), a[i]) - v.begin(); v[it] = a[i]; umax(ans, dp[i] + it + 1); } cout<< ans <<"\n"; } signed main() { // freopen("seq.in", "r", stdin); // freopen("seq.out", "w", stdout); ios_base::sync_with_stdio(0);cin.tie(NULL);cout.tie(NULL); int tt=1;//cin>>tt; while(tt--)solve(); }
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