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Submission #775549

# Submission time Handle Problem Language Result Execution time Memory
775549 2023-07-06T13:51:43 Z vjudge1 Rack (eJOI19_rack) C++17
100 / 100
 8 ms 7924 KB 
#include<bits/stdc++.h>
using namespace std;
#define lalala ios_base::sync_with_stdio(false);cin.tie(NULL);
#define endl "\n"
#define ll long long
#define pb push_back
#define mod 1000000007
 
int main(){
	lalala;
	ll int n,k;cin>>n>>k;
	ll int arr[n+1];
	arr[0]=1;
	for(int i=1;i<=n;i++){
		arr[i]=(arr[i-1]*(ll int)2)%mod;
	}
	ll int ans=0;
	for(int i=n-1;i>-1;i--){
		if(k%2==0){
			ans+=arr[i];
			ans%=mod;k/=2;
		}
		else k=k/2+1;
	}
	cout<<(ans+1)%mod<<endl;

}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 320 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 316 KB Output is correct
4 Correct 0 ms 312 KB Output is correct
5 Correct 1 ms 320 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 320 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 316 KB Output is correct
4 Correct 0 ms 312 KB Output is correct
5 Correct 1 ms 320 KB Output is correct
6 Correct 1 ms 316 KB Output is correct
7 Correct 0 ms 320 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct

Subtask #3
60.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 320 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 316 KB Output is correct
4 Correct 0 ms 312 KB Output is correct
5 Correct 1 ms 320 KB Output is correct
6 Correct 1 ms 316 KB Output is correct
7 Correct 0 ms 320 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 1 ms 708 KB Output is correct
15 Correct 8 ms 7924 KB Output is correct