Submission #1007299

#	Time	Username	Problem	Language	Result	Execution time	Memory
1007299		Rifal	Longest beautiful sequence (IZhO17_subsequence)	C++14	0 / 100	1 ms	348 KiB

subsequence

#include <bits/stdc++.h>
#include <fstream>
#include<ext/pb_ds/assoc_container.hpp>
#include<ext/pb_ds/tree_policy.hpp>
#define endl '\n'
#define mod 1000000007
#define INF 1000000000
#define INF2 2000000000
#define fi first
#define se second
using namespace std;
double const EPS = 1e-14;
const int P = 1007;
typedef long long ll;
using namespace __gnu_pbds;
typedef long long ll;
typedef tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> ordered_set; // find_by_order, order_of_key
const int Max = 300;
const int M = 1e5 + 5;
int dp[M], last[M];
int where[M];
int arr[M], k[M];
int cnt(int val) {
    int tot = 0;
    for(int i = 0; i < 21; i++) {
        if((val&(1<<i)) > 0) tot++;
    }
    return tot;
}
int main()
{
    ios_base::sync_with_stdio(0);cout.tie(0);cin.tie(0);
    int n; cin >> n; int mx = 0;
    for(int i = 1; i <= n; i++) {
         cin >> arr[i];
         mx = max(arr[i],mx);
    }
    for(int i = 1; i <= n; i++) cin >> k[i];
  if(mx < Max) {  for(int i = 1; i <= n; i++) {
        for(int j = 0; j <= mx; j++) {
            if(dp[j] != 0 && cnt((arr[i]&j)) == k[i]) {
                if(dp[arr[i]] < dp[j]+1) {
                    dp[arr[i]] = dp[j]+1;
                    where[i] = last[j];
                    last[arr[i]] = i;
                }
            }
        }
        if(dp[arr[i]] == 0) {
            dp[arr[i]] = 1;
            last[arr[i]] = i;
        }
    }
    pair<int,int> sol = {};
    for(int i = 1; i <= n; i++) {
        if(sol.fi < dp[arr[i]]) {
            sol.fi = dp[arr[i]];
            sol.se = last[arr[i]];
        }
    }
    vector<int> order;
    while(sol.se != 0) {
        order.push_back(sol.se);
        sol.se = where[sol.se];
    }
    cout << order.size() << endl;
    for(int i = order.size()-1; i >= 0; i--) {
        cout << order[i] << ' ';
    }
    cout << endl;
  }
  else {
    for(int i = 1; i <= n; i++) {
        for(int j = i-1; j >= 1; j--) {
            if(cnt(arr[i]&arr[j]) == k[i]) {
                if(dp[i] < dp[j]+1) {
                    dp[i] = dp[j]+1;
                    last[i] = j;
                }
            }
        }
    }
    pair<int,int> sol = {};
    for(int i = 1; i <= n; i++) {
        if(sol.fi < dp[i]) {
            sol.fi = dp[i];
            sol.se = i;
        }
    }
    cout << sol.fi << endl;
    vector<int> order;
    while(sol.se != 0) {
        order.push_back(sol.se);
        sol.se = last[sol.se];
    }
    for(int i = order.size()-1; i >= 0; i--) {
        cout << order[i] << ' ';
    }
    cout << endl;
  }
}
/*7 1 4        
3 3 3 4 4 2 1
2 4
6 7
4 7
1 4
2
0
2
2*/

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