Submission #1269103

#	Time	Username	Problem	Language	Result	Execution time	Memory
1269103		raymoo_	Longest beautiful sequence (IZhO17_subsequence)	C++20	0 / 100	7 ms	9032 KiB

subsequence

// #pragma GCC optimize("O3") // Enable aggressive optimizations

#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 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];

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;

    map<int, vect<int>, greater<int>> fumo;

    for(int idx=0;n>idx;idx++){
        if(pc[a[idx]] < k[idx]){
            fumo[1].eb(idx); continue;        
        }
        for(const auto& i : fumo){
            for(const auto& j : i.se) if(pc[a[idx] & a[j]] == k[idx]){
                dp[idx] = i.fi+1;
                par[idx] = j;
                break;
            } 
            if(par[idx] != -1) break;
        }

        fumo[dp[idx]].eb(idx);

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

    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: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".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
subsequence.cpp:33:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   33 |         freopen(FILE".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
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.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
subsequence.cpp:36:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   36 |         freopen("ellencute.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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