1085. Perfect Sequence

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#include <iostream>
#include <algorithm>
#include <queue>
#include <cstdio>
#include <cctype>
#include <map>
#include <string>
#include <cstring>
#include <stack>
#include <set>
using namespace std;

vector<long long> vec;

int main() {
    int n;
    long long p, e;
    scanf("%d%lld", &n, &p);
    for (int i = 0; i < n; i++) {
        scanf("%lld", &e);
        vec.push_back(e);
    }
    sort(vec.begin(), vec.end());
    int ans = 0;
    for (int i = 0; i < n; i++) {
        int pos = upper_bound(vec.begin(), vec.end(), vec[i]*p) - vec.begin();
        if (pos-1 >= 0) pos -= 1;
        // cout << vec[i]*p << " " << pos << endl;
        ans = max(ans, pos-i+1);
    }
    printf("%d\n", ans);
    return 0;
}