Submission #488406

#	Time	Username	Problem	Language	Result	Execution time	Memory
488406		cfalas	Financial Report (JOI21_financial)	C++14	48 / 100	225 ms	124524 KiB

Main

#include<bits/stdc++.h>
using namespace std;
#define mp make_pair
#define INF 10000000
#define MOD 1000000007
#define MID ((l+r)/2)
#define HASHMOD 2305843009213693951
#define ll long long
#define ull unsigned long long
#define F first
#define S second
typedef pair<ll, ll> ii;
typedef pair<ii, int> iii;
typedef vector<int> vi;
typedef vector<ii> vii;
typedef map<int, int> mii;

#define EPS 1e-6
#define FOR(i,n) for(int i=0;i<((int)(n));i++)
#define FORi(i,a,b) for(int i=((int)(a));i<((int)(b));i++)
#define FOA(v, a) for(auto v : a)

vi a, b;
int n, k;
map<int, int> m;

int dp[9000];

int pos[9000][9000];

int rec(int x){
	int ans=1;
	if(dp[x]!=-1) return dp[x];
	FOR(i,n){
		if(x+i+1>=n) break;
		if(pos[x][x+i+1]) ans = max(ans, 1 + rec(x+i+1));

	}
	//assert(ans>=dp[x]);
	dp[x] = max(dp[x], ans);
	return ans;
}

int main(){
	ios::sync_with_stdio(false);
	cin.tie(0);
	cin>>n>>k;
	//FOR(i,n) FOR(j,n) dp[i][j] = -1;
	FOR(i,n+1) dp[i] = -1;
	a.resize(n);
	FOR(i,n) cin>>a[i];
	int cnt=0;
	set<int> all;
	FOR(i,n) all.insert(a[i]);
	FOA(v, all) m[v] = ++cnt;
	FOR(i,n) a[i] = m[a[i]];
	//FOR(i,n) cout<<a[i]<<" ";
	//cout<<endl;

	FOR(i,n){
		int cnt=0;
		FORi(j,i+1,n){
			if(a[j]>a[i]) cnt++;
			else cnt=0;
			if(cnt<=k && a[j]>a[i]) pos[i][j] = true;
			if(cnt>=k) break;
		}
	}
	/*
	FOR(i,n){
		cout<<i<<": ";
		FORi(j,i+1,n) if(pos[i][j]) cout<<j<<" ";
		cout<<endl;
	}*/
	int maxa = 0;
	FOR(i,n){
		maxa = max(maxa, rec(n-i-1));
	}
	cout<<maxa<<endl;


}

• Subtask 1: 14 / 14
• Subtask 2: 14 / 14
• Subtask 3: 20 / 20
• Subtask 4: 0 / 12
• Subtask 5: 0 / 5
• Subtask 6: 0 / 35