Submission #1304849

#	Time	Username	Problem	Language	Result	Execution time	Memory
1304849		trinm01	Financial Report (JOI21_financial)	C++20	5 / 100	330 ms	42364 KiB

Main

// #pragma GCC optimize("O3")
// #pragma GCC optimization("Ofast,unroll-loops")
// #pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
#include <bits/stdc++.h>
using namespace std;

#define int long long 
#define ll long long
#define FOR(i, l, r) for (int i = (l); i <= (r); i++)
#define FOD(i, r, l) for (int i = (r); i >= (l); i--)
#define fi first
#define se second
#define pii pair<int, int>

const ll mod = 1e9 + 7;
const int MAXN = 1e6 + 5;
const ll oo = 1e18 + 7;  
const int base = 10;

int n, d, a[MAXN], b[MAXN];

int st[4*MAXN];
void update(int id, int l, int r, int i, int val){
	if(l>i || r<i){
		return;
	}
	if(l>=r){
		st[id]=val;
		return;
	}
	int mid=(l+r)/2;
	update(id*2, l, mid, i, val);
	update(id*2+1, mid+1, r, i, val);
	st[id]=max(st[id*2], st[id*2+1]);
}
int get(int id, int l, int r, int i, int j){
	if(l>j || r<i){
		return 0;
	}
	if(l>=i && r<=j){
		return st[id];
	}
	int mid=(l+r)/2;
	return max(get(id*2, l, mid, i, j), get(id*2+1, mid+1, r, i, j));
}

vector<int> nen;
unordered_map<int, int> mp, kt;

int f[MAXN];

signed main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    
    
    // freopen("test.txt", "r", stdin);
    // freopen("o2.out", "w", stdout);

    if(fopen(".inp", "r")){
        freopen(".inp", "r", stdin);
        freopen(".out", "w", stdout);
    }

    cin >> n >> d;
    FOR(i, 1, n){
    	cin >> a[i];
    }
    
    FOR(i, 1, n){
    	nen.push_back(a[i]);
    }
    sort(nen.begin(), nen.end());
    FOR(i, 1, n){
    	mp[a[i]]++;
    	b[i]=lower_bound(nen.begin(), nen.end(), a[i])-nen.begin()+mp[a[i]];
    	kt[a[i]]=b[i];
    }
    
    int res=0;
	FOD(i, n, 1){
		if(i+d+1<=n){
			update(1, 1, n, b[i+d+1], 0);
		}
		int ans=get(1, 1, n, kt[a[i]]+1, n)+1;
		f[i]=ans;
		res=max(res, ans);
		update(1, 1, n, b[i], f[i]);
	}
	
	cout << res;
    
    return 0;
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:62:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   62 |         freopen(".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~
Main.cpp:63:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   63 |         freopen(".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~

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