oj.uz

Submission #334812

# Submission time Handle Problem Language Result Execution time Memory
334812 2020-12-10T03:36:39 Z limabeans Rack (eJOI19_rack) Python 3
40 / 100
 31 ms 3692 KB 
readints=lambda:map(int, input().strip('\n').split())
mod=10**9+7
n,k=readints()

def f(n,k):
    if n==0: return 1
    if k>(2**n)//2:
        return 2*f(n-1,k-(2**n)//2)
    else:
        return 2*f(n-1,k)-1


res = f(n,k)
res %= mod
res += mod
res %= mod
print(res)

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 2924 KB Output is correct
2 Correct 16 ms 2924 KB Output is correct
3 Correct 16 ms 2796 KB Output is correct
4 Correct 16 ms 2796 KB Output is correct
5 Correct 16 ms 2796 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 2924 KB Output is correct
2 Correct 16 ms 2924 KB Output is correct
3 Correct 16 ms 2796 KB Output is correct
4 Correct 16 ms 2796 KB Output is correct
5 Correct 16 ms 2796 KB Output is correct
6 Correct 16 ms 2796 KB Output is correct
7 Correct 16 ms 2796 KB Output is correct
8 Correct 16 ms 2796 KB Output is correct
9 Correct 16 ms 2796 KB Output is correct
10 Correct 16 ms 2924 KB Output is correct

Subtask #3
0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 2924 KB Output is correct
2 Correct 16 ms 2924 KB Output is correct
3 Correct 16 ms 2796 KB Output is correct
4 Correct 16 ms 2796 KB Output is correct
5 Correct 16 ms 2796 KB Output is correct
6 Correct 16 ms 2796 KB Output is correct
7 Correct 16 ms 2796 KB Output is correct
8 Correct 16 ms 2796 KB Output is correct
9 Correct 16 ms 2796 KB Output is correct
10 Correct 16 ms 2924 KB Output is correct
11 Correct 17 ms 2796 KB Output is correct
12 Correct 18 ms 3400 KB Output is correct
13 Runtime error 31 ms 3692 KB Execution failed because the return code was nonzero
14 Halted 0 ms 0 KB -