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Submission #88553

# Submission time Handle Problem Language Result Execution time Memory
88553 2018-12-06T12:16:00 Z Gogotchuri Triumphal arch (POI13_luk) PyPy
0 / 100
 62 ms 28584 KB 
import sys
sys.setrecursionlimit(200000)

def depth_first(h, p, t, ls, memo):
    sm = 0
    for elem in ls[h]:
        if elem == p:
            continue
        depth_first(elem, h, t, ls, memo)
        sm += memo[elem]
    memo[h] = max(sm - t + 1, 1)


def main():
    n = int(input())
    ls = [[] for i in range(n + 2)]
    memo = [0 for i in range(n + 2)]
    for _ in range(n - 1):
        f, s = map(int, input().split())
        f -= 1
        s -= 1
        ls[f].append(s)
        ls[s].append(f)    
    s = 0
    e = n
    while not s > e:
        m = (s + e) >> 1
        t = m
        depth_first(0, -1, t, ls, memo)
        if memo[0] > 1:
            s = m + 1
        else:
            e = m-1

    print(s)

if __name__ == "__main__":
    main()

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 35 ms 11340 KB Execution failed because the return code was nonzero
2 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 32 ms 11448 KB Execution failed because the return code was nonzero
2 Halted 0 ms 0 KB -

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 34 ms 11664 KB Execution failed because the return code was nonzero
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 35 ms 11664 KB Execution failed because the return code was nonzero
2 Halted 0 ms 0 KB -

Subtask #5
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 42 ms 13648 KB Execution failed because the return code was nonzero
2 Halted 0 ms 0 KB -

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 40 ms 13908 KB Execution failed because the return code was nonzero
2 Halted 0 ms 0 KB -

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 35 ms 15648 KB Execution failed because the return code was nonzero
2 Halted 0 ms 0 KB -

Subtask #8
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 44 ms 17444 KB Execution failed because the return code was nonzero
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 62 ms 28508 KB Execution failed because the return code was nonzero

Subtask #10
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 60 ms 28584 KB Execution failed because the return code was nonzero
2 Halted 0 ms 0 KB -