Submission #333983

#	Time	Username	Problem	Language	Result	Execution time	Memory
333983		Kerim	Longest beautiful sequence (IZhO17_subsequence)	C++17	0 / 100	1 ms	492 KiB

subsequence

#include "bits/stdc++.h"
#define MAXN 100009
#define INF 1000000007
#define mp(x,y) make_pair(x,y)
#define all(v) v.begin(),v.end()
#define pb(x) push_back(x)
#define wr cout<<"----------------"<<endl;
#define ppb() pop_back()
#define tr(ii,c) for(__typeof((c).begin()) ii=(c).begin();ii!=(c).end();ii++)
#define ff first
#define ss second
#define my_little_dodge 46
#define debug(x)  cerr<< #x <<" = "<< x<<endl;
using namespace std;

typedef long long ll;
typedef pair<int,int> PII;
template<class T>bool umin(T& a,T b){if(a>b){a=b;return 1;}return 0;}
template<class T>bool umax(T& a,T b){if(a<b){a=b;return 1;}return 0;}
const int N=256;
PII dp[N];
int a[MAXN],k[MAXN],bit[N],par[MAXN];
int main(){
	for(int i=0;i<N;i++)
		bit[i]=__builtin_popcount(i);
    //freopen("file.in", "r", stdin);
    int n;
    scanf("%d",&n);
    for(int i=1;i<=n;i++)
    	scanf("%d",a+i);
    for(int i=1;i<=n;i++)
    	scanf("%d",k+i);
    int ans=0,who,change;
    vector<int>res;
    for(int i=1;i<=n;i++){change=0;
    	for(int j=0;j<N;j++){
    		if(bit[j&a[i]]==k[i])
    			if(umax(dp[a[i]].ff,dp[j].ff+1)){
    				change=1;
    				par[i]=dp[j].ss;
    			}
    	}
    	if(!dp[a[i]].ff)
    		dp[a[i]]=mp(1,i);
    	else if(change)
    		dp[a[i]].ss=i;
    	if(umax(ans,dp[a[i]].ff))
    		who=i;
    }
    while(who){
    	res.pb(who);
		who=par[who];	
    }reverse(all(res));
    printf("%d\n",ans);
    tr(it,res)
    	printf("%d ",*it);
    puts("");
	return 0;
}

Compilation message (stderr)

subsequence.cpp: In function 'int main()':
subsequence.cpp:28:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   28 |     scanf("%d",&n);
      |     ~~~~~^~~~~~~~~
subsequence.cpp:30:11: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   30 |      scanf("%d",a+i);
      |      ~~~~~^~~~~~~~~~
subsequence.cpp:32:11: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   32 |      scanf("%d",k+i);
      |      ~~~~~^~~~~~~~~~

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