Submission #692525

#	Time	Username	Problem	Language	Result	Execution time	Memory
692525		biabeogo147	Longest beautiful sequence (IZhO17_subsequence)	C++14	0 / 100	1 ms	212 KiB

subsequence

#include <bits/stdc++.h>
using namespace std;

const int N = 1e5 + 5, sub1 = 5e3 + 5, sub2 = 1e3 + 5;
int n, A[N], K[N], dp[sub1], dp2[sub2];

void Sub1()
{
    int ans = 0;
    for (int i = 1; i <= n; ++i)
    {
        dp[i] = 1;
        for (int j = i - 1; j >= 1; --j)
            if (__builtin_popcount(A[i] & A[j]) == K[i])
                dp[i] = max(dp[i], dp[j] + 1);
        ans = max(ans, dp[i]);
    }
    cout << ans;
}

void Sub2()
{
    int ans = 0;
    for (int i = 1; i <= n; ++i)
    {
        int maxDp = dp2[A[i]];
        if (__builtin_popcount(A[i]) == K[i])
            maxDp = dp2[A[i]] + 1;

        for (int j = 0; j < sub2; ++j)
            if (j != A[i] && __builtin_popcount(A[i] & j) == K[i])
                maxDp = max(maxDp, dp2[j] + 1);

        ans = max(ans, dp2[A[i]] = maxDp);
    }

    cout << ans;
}

int main()
{

    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    cin >> n;
    for (int i = 1; i <= n; ++i)
        cin >> A[i];
    for (int i = 1; i <= n; ++i)
        cin >> K[i];

    if (n <= 5000)
        Sub1();
    else
        Sub2();

    return 0;
}

• Subtask 1: 0 / 7
• Subtask 2: 0 / 16
• Subtask 3: 0 / 17
• Subtask 4: 0 / 60