Submission #1269055

#	Time	Username	Problem	Language	Result	Execution time	Memory
1269055		raymoo_	Longest beautiful sequence (IZhO17_subsequence)	C++17	40 / 100	5940 ms	20008 KiB

subsequence

#include<bits/stdc++.h>
using namespace std; 
#define fi first
#define se second
#define pb push_back
#define eb emplace_back
#define umap unordered_map
#define prq priority_queue
#define vect vector
#define rs resize
#define bend(v) v.begin(),v.end()
#define pob pop_back
#define pof pop_front
#define lwb lower_bound
#define upb upper_bound
#define pii pair<int,int>
#define nextl cout << '\n'
#define el '\n'
#define deb cout<<"\nok\n";return 
#define ll long long
#define int long long
#define dbl long double
#define popcnt __builtin_popcount
#define ctz __builtin_ctz
#define FILE "ellencute"
 
const ll INF=902337203695775807, N=2e5+69, MOD=1e9+7;    
 
void ffopen(){
    if(fopen(FILE".inp", "r")){
        freopen(FILE".inp", "r", stdin);
        freopen(FILE".out", "w", stdout);
    }else if(fopen("ellencute.inp", "r")){
        freopen("ellencute.inp", "r", stdin);
        freopen("ellencute.out", "w", stdout);
    }
}

int pm(int a,const int b=1e9+7){return ((a%b)+b)%b;}
int sq(int x){return x*x;}
ll __lcm(ll a, ll b, const ll lim=LLONG_MAX){
    if(a == -1 || b == -1)return -1;
    ll g = __gcd(a,b);
    if(b/g > lim/a)return -1;
    return (a/g)*b;
}

int pc[(int)2e6], par[N];


mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

ll rand(int l,int r)
{
    return l+((rng()*1LL*rng()%(r-l+1)+(r-l+1))%(r-l+1));
}


void sol(){
    int n;
    cin >> n;
    int a[n], k[n], dp[n];
    fill(dp, dp+n, 1);
    memset(par, -1, sizeof par);
    for(int& i : a) cin >> i;
    for(int& i : k) cin >> i;

    for(int i=0;2e6>i;i++) pc[i] = popcnt(i);

    int mx = 0;


    for(int i=0;n>i;i++){
        for(int j=i-1;j>=max(i-rand(5e3, max((int)5e3, i/2)), 0ll);j--){
            if(pc[a[i] & a[j]] == k[i] && dp[j]+1 > dp[i]){
                par[i] = j;
                dp[i] = dp[j]+1;
            }   
        }

        for(int j=0;min(5000ll, i/2)>j;j++){
            if(pc[a[i] & a[j]] == k[i] && dp[j]+1 > dp[i]){
                par[i] = j;
                dp[i] = dp[j]+1;
            }   
        }

        mx = max(mx, dp[i]);
    }

    for(int i=n-1;i>=0;i--){
        if(dp[i] == mx){
            vect<int> ans;
            for(;i>-1;i=par[i]) ans.eb(i);
            cout << ans.size() << el;
            reverse(bend(ans));
            for(int i : ans) cout << i+1 << ' ';
            return;
        }
    }
}

signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    ffopen();
    int t=1;
    //cin >> t;
    while(t--)sol();
}
/*
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*/

Compilation message (stderr)

subsequence.cpp: In function 'void ffopen()':
subsequence.cpp:31:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   31 |         freopen(FILE".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
subsequence.cpp:32:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   32 |         freopen(FILE".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
subsequence.cpp:34:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   34 |         freopen("ellencute.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
subsequence.cpp:35:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   35 |         freopen("ellencute.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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