Submission #362907

#	Time	Username	Problem	Language	Result	Execution time	Memory
362907		Nimbostratus	Global Warming (CEOI18_glo)	C++17	15 / 100	2084 ms	5356 KiB

glo

#include <bits/stdc++.h>
using namespace std;
#define eb emplace_back
#define pb push_back
#define ppb pop_back
#define ub upper_bound
#define lb lower_bound
#define bs binary_search
#define cl(a,s) memset((a),0,sizeof((a)[0])*(s))
#define all(x) (x).begin() , (x).end()
#define fi first
#define se second
#define int int
using pii = pair<int,int>;
using ll = long long;
const int maxn = 2e5+5;
const int inf = 2e9;
const int mod = 1e9+7;

int n,x;
int a[maxn];
int d[maxn];
int ans[maxn];
int tmp[maxn];

int lis() {
	int ret = -1;
	d[0] = -inf;
	for(int i=1;i<=n;i++) d[i] = inf;
	for(int i=1;i<=n;i++) {
		int pos = lb(d,d+n+1,a[i])-d;
		d[pos] = a[i];
		ans[i] = pos;
		ret = max(ret,pos);
	}
	return ret;
}

int32_t main () {
	//freopen("in","r",stdin); freopen("out","w",stdout);
	ios_base::sync_with_stdio(0); cout.tie(0); cin.tie(0);
	cin >> n >> x;
	for(int i=1;i<=n;i++) cin >> a[i];
	for(int i=1;i<=n;i++) tmp[i] = a[i];
	int ans = -inf;
	for(int i=1;i<=n;i++)
		for(int j=i;j<=n;j++)
			for(int k=-x;k<=x;k++) {
				for(int i=1;i<=j;i++) a[i] += k;
				int res = lis();
				if(res > ans) {
					//cout << res << " " << ans << endl;
					//cout << i << " " << j << " " << k << endl;
					ans = res;
				}
				for(int i=1;i<=j;i++) a[i] = tmp[i];
			}
	cout << ans << endl;
}	
	

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 0 / 13
• Subtask 4: 0 / 10
• Subtask 5: 0 / 20
• Subtask 6: 0 / 17
• Subtask 7: 0 / 25