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Submission #999795

# Submission time Handle Problem Language Result Execution time Memory
999795 2024-06-16T06:59:30 Z vjudge1 Rack (eJOI19_rack) C++17
100 / 100
 0 ms 348 KB 
#include <bits/stdc++.h>
using namespace std;
#define endl '\n'
#define ll long long
const ll sz=2e5+5, mod=1e9+7;
ll power(ll a, ll b)
{
    if(b==0) return 1;
    ll temp=power(a, b/2);
    if(b%2==0){
        return temp%mod*temp%mod;
    }
    return (temp%mod*temp%mod*a)%mod;
}
int main()
{
    ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
    ll n, k;
    cin>>n>>k;
    ll j=n-1, ans=0;
    //cout<<power(2, 3)<<' ';
    if(k==1){
        cout<<1;
        return 0;
    }
    while(k>1){
        if(k%2==0){
            ans+=power(2, j);
            ans%=mod;
        }
        k=(k+1)/2;
        j--;
    }
    cout<<ans+1;
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 344 KB Output is correct

Subtask #3
60.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct