Submission #343781

#	Time	Username	Problem	Language	Result	Execution time	Memory
343781		IZhO_2021_I_want_Silver	Longest beautiful sequence (IZhO17_subsequence)	C++14	0 / 100	1 ms	364 KiB

subsequence

#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,sse3,sse4,popcnt,abm,mmx")

#include <iostream>
#include <algorithm>
#include <vector>
#include <cmath>
#include <set>
#include <map>
#include <iomanip>
#include <cassert>
#include <stack>
#include <queue>
#include <deque>
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>-

using namespace std;
//using namespace __gnu_pbds;

typedef long long ll;
typedef pair <int, int> pii;
typedef pair <ll, ll> pll;

// template<typename T> using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
//  order_of_key (k) : Number of items strictly smaller than k .
//  find_by_order(k) : K-th element in a set (counting from zero).
#define sz(a) (int)a.size()
#define all(a) a.begin(), a.end()
#define pb push_back
#define ppb pop_back
#define mkp make_pair
#define F first
#define S second
#define lb lower_bound
#define ub upper_bound
#define show(a) cerr << #a <<" -> "<< a <<" "
#define nl cerr <<"\n"
//#define int ll

const int N = 2e6 + 5;
const int oo = 1e9 + 5;

int n, a[N], k[N], dp[N], pre[N], mx[N];
vector <int> vec;

void solve() {
    cin >> n;
    for (int i = 1; i <= n; ++i) {
        cin >> a[i];
    }
    for (int i = 1; i <= n; ++i) {
        cin >> k[i];
        dp[i] = 1;
    }
    for (int i = 1; i <= n; ++i) {
        if (__builtin_popcount(a[i]) < k[i]) { continue; }
        for (int j = i-1; j >= 1; --j) {
            if (__builtin_popcount(a[i] & a[j]) == k[i]) {
                if (dp[i] < dp[j] + 1) {
                    dp[i] = dp[j] + 1;
                    pre[i] = j;
                }
            }
            if (dp[i] > mx[j]) { break; }
        }
        mx[i] = max(mx[i-1], dp[i]);
    }
    int ans = 0, pos = 0;
    for (int i = 1; i <= n; ++i) {
        if (ans < dp[i]) {
            ans = dp[i];
            pos = i;
        }
    }
    while (pre[pos]) {
        vec.pb(pos);
        pos = pre[pos];
    }
    vec.pb(pos);
    reverse(all(vec));
    cout << sz(vec) <<"\n";
    for (int i = 0; i < sz(vec); ++i) {
        cout << vec[i] <<" ";
    }
}

 main () {
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	int tests = 1;
	//cin >> tests;
	while (tests --) {
		solve();
	}
	return 0;
}
/*
    Just Chalish!
4
1 2 3 4
10 0 1 0

2
8 9
20 0

5
5 3 5 3 5
10 1 20 1 20
*/

Compilation message (stderr)

subsequence.cpp:88:8: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   88 |  main () {
      |        ^

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