Submission #1196775

#	Time	Username	Problem	Language	Result	Execution time	Memory
1196775		sasde	Longest beautiful sequence (IZhO17_subsequence)	C++20	23 / 100	6093 ms	1792 KiB

subsequence

#include<bits/stdc++.h>
#define task "strdel"
#define ii pair<int,int>
#define iii pair<int,ii>
#define iv pair<ii,ii>
#define se second
#define fi first
#define ffi fi.fi
#define sfi se.fi
#define sse se.se
#define fse fi.se
#define lt(i, c, d) for(int i = c; i <= d; ++i)
#define fl(i, c, d) for(int i = d; i >= c; --i)
#define pb push_back
#define emb emplace_back
#define emf emplace_front
#define em emplace
using namespace std;
const int N=1e6+5,lg=20,mod=1e9+7;
mt19937 rd(chrono::steady_clock::now().time_since_epoch().count());
int Rand(int u,int v){
 return u+rd()%(v-u+1);
}
int n,a[N],k[N],dp[N],trace[N];
void solve(){
    cin >> n;
    for(int i=1;i<=n;++i)cin >> a[i];
    for(int i=1;i<=n;++i)cin >> k[i];
    int ans=0,v=0;
    for(int i=1;i<=n;++i){
        dp[i]=1;
        for(int j=1;j<i;++j){
            int u=a[i]&a[j];
            u=__builtin_popcount(u);
            if(u==k[i])
                {
                    if(dp[j]+1>dp[i]){
            dp[i]=dp[j]+1;
trace[i]=j;
           }
        }
            // cout <<a[i]<<" "<<a[j]<<" "<<j<<" "<<i<<" "<<u<<" "<<dp[j]<<'\n';
        }
        if(ans<dp[i]){
            v=i;
            ans=dp[i];
        }
    }

cout << ans<<'\n';
vector<int>res;
while(v){
    res.emb(v);
    v=trace[v];
}
reverse(res.begin(),res.end());
for(int i:res)cout <<i<<" ";
}
main()
{
  srand(time(0));
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    if(fopen(task".inp","r")){
      freopen(task".inp","r",stdin);
      freopen(task".out","w",stdout);
    }
    int t=1;
 //   cin >> t;
while(t--){
    solve();
    cout<<'\n';
}

}

Compilation message (stderr)

subsequence.cpp:59:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   59 | main()
      | ^~~~
subsequence.cpp: In function 'int main()':
subsequence.cpp:66:14: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   66 |       freopen(task".inp","r",stdin);
      |       ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
subsequence.cpp:67:14: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   67 |       freopen(task".out","w",stdout);
      |       ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

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