Submission #1094939

#	Time	Username	Problem	Language	Result	Execution time	Memory
1094939		cpptowin	Longest beautiful sequence (IZhO17_subsequence)	C++17	0 / 100	33 ms	82900 KiB

subsequence

#include <bits/stdc++.h>
#define fo(i, d, c) for (int i = d; i <= c; i++)
#define fod(i, c, d) for (int i = c; i >= d; i--)
#define maxn 100010
#define N 1010
#define fi first
#define se second
#define pb emplace_back
#define en cout << "\n";
#define bitcount(x) __builtin_popcountll(x)
#define pii pair<int, int>
#define vii vector<pii>
#define lb(x) x & -x
#define bit(i, j) ((i >> j) & 1)
#define offbit(i, j) (i ^ (1LL << j))
#define onbit(i, j) (i | (1LL << j))
#define vi vector<int>
#define all(x) x.begin(), x.end()
#define ss(x) (int)x.size()
template <typename T1, typename T2>
bool minimize(T1 &a, T2 b)
{
    if (a > b)
    {
        a = b;
        return true;
    }
    return false;
}
template <typename T1, typename T2>
bool maximize(T1 &a, T2 b)
{
    if (a < b)
    {
        a = b;
        return true;
    }
    return false;
}
using namespace std;
const int nsqrt = 450;
const int mod = 1e9 + 7;
void add(int &x, int k)
{
    x += k;
    x %= mod;
    if (x < 0)
        x += mod;
}
void del(int &x, int k)
{
    x -= k;
    x %= mod;
    if (x < 0)
        x += mod;
}
pii f[1 << 11][1 << 11][11];
int n, a[maxn], trace[maxn], k[maxn], l[maxn], r[maxn];
int ans, pos;
main()
{
#define name "TASK"
    if (fopen(name ".inp", "r"))
    {
        freopen(name ".inp", "r", stdin);
        freopen(name ".out", "w", stdout);
    }
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cin >> n;
    fo(i, 1, n)
    {
        cin >> a[i];
        l[i] = a[i] >> 10;
        r[i] = a[i] & ((1 << 11) - 1);
    }
    fo(i, 1, n) cin >> k[i];
    fo(i, 1, n)
    {
        int best = 1, pp = 0;
        fo(mask, 0, (1 << 11) - 1)
        {
            int need = k[i] - bitcount(mask & r[i]);
            if (need < 0)
                continue;
            if (maximize(best, f[l[i]][mask][need].fi + 1))
                pp = f[l[i]][mask][need].se;
        }
        trace[i] = pp;
        if (maximize(ans, best))
            pos = i;
        fo(mask, 0, (1 << 11) - 1)
        {
            if (maximize(f[mask][r[i]][bitcount(mask & l[i])].fi, best))
                f[mask][r[i]][bitcount(mask & l[i])].se = i;
        }
    }
    cout << ans;
    en;
    vi res;
    while (pos)
    {
        res.pb(pos);
        pos = trace[pos];
    }
    reverse(all(res));
    for (int it : res)
        cout << it << ' ';
    en;
}

Compilation message (stderr)

subsequence.cpp:60:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   60 | main()
      | ^~~~
subsequence.cpp: In function 'int main()':
subsequence.cpp:65:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   65 |         freopen(name ".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
subsequence.cpp:66:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   66 |         freopen(name ".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

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