제출 #172921

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
172921		VEGAnn	Longest beautiful sequence (IZhO17_subsequence)	C++14	23 / 100	63 ms	632 KiB

subsequence

#include <bits/stdc++.h>
//#pragma GCC optimize ("unroll-loops")
//#pragma GCC optimize ("-O3")
//#pragma GCC optimize ("Ofast")
#define sz(x) ((int)x.size())
#define PB push_back
#define all(x) x.begin(),x.end()
using namespace std;
const int N = 5100;
//const int N2 = N * N;
const int PW = 8;
const int VL = (1 << PW) + 1;
const int oo = 2e9;
vector<int> sp[VL][PW + 1], vc;
int n, a[N], k[N], pr[N], f[N], ans = 0, nm = -1;

bool ok(int x, int y){
    return (__builtin_popcount(a[x] & a[y]) == k[y]);
}

int main(){
    ios_base::sync_with_stdio(0); cin.tie(0);
//    freopen("in.txt","r",stdin);

    cin >> n;
    for (int i = 0; i < n; i++)
        cin >> a[i];
    for (int i = 0; i < n; i++)
        cin >> k[i];

    for (int i = 0; i < n; i++) {
        f[i] = 1;
        for (int j = i - 1; j >= 0; j--)
            if (f[j] + 1 > f[i] && ok(j, i)){
                f[i] = f[j] + 1;
                pr[i] = j;
            }

        if (f[i] > ans){
            ans = f[i];
            nm = i;
        }
    }

    for (;;){
        vc.PB(nm + 1);
        if (f[nm] == 1) break;
        nm = pr[nm];
    }

    reverse(all(vc));
    cout << sz(vc) << '\n';
    for (int x : vc)
        cout << x << " ";
    return 0;
}

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