結果

問題 No.3013 ハチマキ買い星人
ユーザー ytsutsu
提出日時 2025-02-02 15:36:57
言語 PyPy3
(7.3.15)
結果
AC  
実行時間 1,090 ms / 2,000 ms
コード長 2,263 bytes
コンパイル時間 443 ms
コンパイル使用メモリ 82,688 KB
実行使用メモリ 143,744 KB
最終ジャッジ日時 2025-02-02 15:37:29
合計ジャッジ時間 26,186 ms
ジャッジサーバーID
（参考情報） 		judge4 / judge1
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 1
other AC * 45
権限があれば一括ダウンロードができます

ソースコード

diff # 

#!/usr/bin/env python3
from ast import Call, parse, unparse, walk
from heapq import heappop, heappush
from inspect import currentframe, getsourcelines
from sys import maxsize, stdin

_tokens = (y for x in stdin for y in x.split())
def read(): return next(_tokens)
def iread(): return int(next(_tokens))


def dprint(*args, pretty=True):
    def _inner(v):
        def _format_3d(v): return '\n' + '\n'.join(['\n'.join([' '.join([str(z) for z in y]) for y in x]) + '\n' for x in v]).rstrip('\n')
        def _format_2d(v): return '\n' + '\n'.join([' '.join([str(y) for y in x]) for x in v])
        def _dim(v): return (1 + min(_dim(x) for x in v) if v else 1) if isinstance(v, (list, tuple)) else 1 if isinstance(v, str) and len(v) > 1 else 0
        dim = _dim(v) if pretty else -1
        return _format_3d(v) if dim == 3 else _format_2d(v) if dim == 2 else str(v)
    frame = currentframe().f_back
    source_lines, start_line = getsourcelines(frame)
    tree = parse(source_lines[frame.f_lineno - max(1, start_line)].strip())
    call_node = next(node for node in walk(tree) if isinstance(node, Call) and node.func.id == 'dprint')
    arg_names = [unparse(arg) for arg in call_node.args]
    print(', '.join([f'\033[4;35m{name}:\033[0m {_inner(value)}' for name, value in zip(arg_names, args)]))


def main():
    n, m, p, y = iread(), iread(), iread(), iread()
    abc = [(iread() - 1, iread() - 1, iread()) for _ in range(m)]
    de = [(iread() - 1, iread()) for _ in range(p)]
    to = [[] for _ in range(n)]
    for a, b, c in abc:
        to[a].append((b, c))
        to[b].append((a, c))
    hq = []
    def push(x): heappush(hq, x)
    def pop(): return heappop(hq)
    INF = maxsize
    dist = [INF for _ in range(n)]
    dist[0] = 0
    push((0, 0))
    while hq:
        v, i = pop()
        if dist[i] != v:
            continue
        for j, c in to[i]:
            nv = v + c
            if dist[j] <= nv:
                continue
            dist[j] = nv
            push((nv, j))
    # dprint(dist)
    ans = 0
    for d, e in de:
        if dist[d] == INF:
            continue
        v = y - dist[d]
        if v <= 0:
            continue
        u = v // e
        ans = max(ans, u)
    print(ans)


if __name__ == '__main__':
    main()
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