Submission #1000288

#	Time	Username	Problem	Language	Result	Execution time	Memory
1000288		Hanksburger	Longest beautiful sequence (IZhO17_subsequence)	C++17	0 / 100	1 ms	604 KiB

subsequence

#include <bits/stdc++.h>
using namespace std;
int dp[100005], pre[100005], a[100005], k[100005], ind[260];
stack<int> s;
int bitCount(int x, int y)
{
    int cnt=0;
    for (int i=0; i<8; i++)
        if (x&y&(1<<i))
            cnt++;
    return cnt;
}
int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int n, cur, mx=0;
    cin >> n;
    for (int i=1; i<=n; i++)
        cin >> a[i];
    for (int i=1; i<=n; i++)
        cin >> k[i];
    for (int i=1; i<=n; i++)
    {
        dp[i]=1;
        for (int j=0; j<256; j++)
        {
            if (ind[j] && bitCount(a[i], j)==k[i])
            {
                if (dp[i]<dp[ind[j]]+1)
                {
                    dp[i]=dp[ind[j]]+1;
                    pre[i]=ind[j];
                }
            }
        }
        if (mx<dp[i])
        {
            mx=dp[i];
            cur=i;
        }
        if (dp[ind[a[i]]]<dp[i])
            ind[a[i]]=i;
    }
    cout << dp[cur] << '\n';
    while (cur)
    {
        s.push(cur);
        cur=pre[cur];
    }
    while (!s.empty())
    {
        cout << s.top() << ' ';
        s.pop();
    }
}

Compilation message (stderr)

subsequence.cpp: In function 'int main()':
subsequence.cpp:46:24: warning: 'cur' may be used uninitialized in this function [-Wmaybe-uninitialized]
   46 |     cout << dp[cur] << '\n';
      |                        ^~~~

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