제출 #607501

#제출 시각아이디문제언어결과실행 시간메모리
607501PietraGlobal Warming (CEOI18_glo)C++14
0 / 100
2060 ms117388 KiB
#include<bits/stdc++.h> using namespace std ; const int maxn = 2e5 + 5 ; const int inf = 1e9 + 1 ; int n, x, v[maxn], tree[4*maxn] ; map<int,int> bit ; vector<int> vec ; struct BIT{ void upd(int pos, int val){ if(pos <= 0) return ; for(; pos < inf ; pos += pos&-pos) bit[pos] = max(bit[pos], val) ; } int query(int pos){ if(pos <= 0) return 0 ; int tot = 0 ; for(; pos > 0 ; pos -= pos&-pos) tot = max(tot, bit[pos]) ; return tot ; } } Bit ; void solve_1(){ int val = 0 ; for(int i = 1 ; i <= n ; i++){ int mx = Bit.query(v[i] - 1) ; Bit.upd(v[i], mx + 1) ; val = max(val, v[i]) ; } int ans = Bit.query(val+1) ; cout << ans << "\n" ; } int try_val(int l, int r, int val){ // cout << l << " " << r << " " << val << "\n" ; bit.clear() ; for(int i = l ; i <= r ; i++) v[i] += val ; int va = 0 ; for(int i = 1 ; i <= n ; i++){ int mx = Bit.query(v[i] - 1) ; Bit.upd(v[i], mx + 1) ; va = max(va, v[i]) ; } int ans = Bit.query(va+1) ; for(int i = l ; i <= r ; i++) v[i] -= val ; return ans ; } void solve_2(){ int ans = try_val(1, n, 0) ; for(int i = 1 ; i <= x ; i++){ // add for(int l = 1 ; l <= n ; l++){ for(int r = l ; r <= n ; r++){ ans = max(ans, try_val(l, r, i)) ; ans = max(ans, try_val(l, r, -i)) ; } } } cout << ans << "\n" ; } int main(){ ios_base::sync_with_stdio(false) ; cin.tie(NULL) ; cin >> n >> x ; for(int i = 1 ; i <= n ; i++){ cin >> v[i] ; v[i] += (x + 1) ; } if(x == 0) solve_1() ; // else solve_2() ; }
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