Submission #631190

#	Time	Username	Problem	Language	Result	Execution time	Memory
631190		smartmonky	Rack (eJOI19_rack)	C++14	40 / 100	24 ms	33048 KiB

rack

#include <bits/stdc++.h>
#define ll long long
#define pb push_back
#define int ll
using namespace std;
const int mod=1e9;
main(){
	int n,k;
	cin >>n >>k;
	int x=(1 << n);
	vector <int> v(x*2);
	vector <int> ans(x*2);
	v[1]=1;
	ans[1]=1;
	v[2]=x/2+1;
	ans[2]=(v[2]);
	int cnt=2;
	int s=3;
	for(int i=x/4;i>=1;i/=2){
		for(int j=1;j<=cnt;j++){
				v[cnt+j]=v[j]+i;
				ans[s]=(v[j]+i)%mod;
				v[cnt+j]%=mod;
				s++;
		}
		cnt*=2;
	}
	cout<<ans[k];
}

Compilation message (stderr)

rack.cpp:7:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    7 | main(){
      | ^~~~

• Subtask 1: 20 / 20
• Subtask 2: 20 / 20
• Subtask 3: 0 / 60