Submission #126070

#	Time	Username	Problem	Language	Result	Execution time	Memory
126070		briansu	Global Warming (CEOI18_glo)	C++14	100 / 100	72 ms	6384 KiB

glo

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<ll,ll> ii;
#define REP(i, n) for(int i = 0;i < n;i ++)
#define REP1(i, n) for(int i = 1;i <= n;i ++)
#define FILL(i, n) memset(i, n, sizeof(i))
#define X first
#define Y second
#define pb push_back
#define SZ(_a) ((int)(_a).size())
#define ALL(_a) (_a).begin(), (_a).end()
#ifdef brian
#define IOS()
template<typename T>void _do(T &&x){cerr<<x<<endl;}
template<typename T, typename ...t> void _do(T &&x, t &&...X){cerr<<x<<", ";_do(X...);}
#define debug(...) {\
	fprintf(stderr, "%s - %d (%s) = ", __PRETTY_FUNCTION__, __LINE__, #__VA_ARGS__);\
	_do(__VA_ARGS__);\
}
#else
#define IOS() ios_base::sync_with_stdio(0);cin.tie(0);
#define debug(...)
#define endl '\n'
#endif

const ll MAXn = 2e5 + 5;
const ll INF = ll(1e17);
const ll MOD = 1000000007;

ll d[MAXn], dt[MAXn];

int main(){
	IOS();
	ll n, x;
	cin>>n>>x;
	REP1(i, n)cin>>d[i];

	vector<ll> v;

	for(int i = n;i > 0;i --){
		if(!SZ(v) || d[i] < v.back())v.pb(d[i]), dt[i] = SZ(v);
		else 
		{
			ll t = lower_bound(ALL(v), d[i], greater<ll>()) - v.begin();
			dt[i] = t + 1;
			v[t] = d[i];
		}
	}

	ll mx = SZ(v);
	v.clear();

	REP1(i, n)
	{
		mx = max(mx, dt[i] + (lower_bound(ALL(v), d[i] + x) - v.begin()));
		if(!SZ(v) || d[i] > v.back())v.pb(d[i]);
		else *lower_bound(ALL(v), d[i]) = d[i];
	}

	cout<<mx<<endl;

}

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