結果

問題 No.3013 ハチマキ買い星人
ユーザー uuuus17
提出日時 2025-01-25 13:16:57
言語 PyPy3
(7.3.15)
結果
AC  
実行時間 713 ms / 2,000 ms
コード長 2,326 bytes
コンパイル時間 522 ms
コンパイル使用メモリ 82,324 KB
実行使用メモリ 115,328 KB
最終ジャッジ日時 2025-01-25 22:41:29
合計ジャッジ時間 17,145 ms
ジャッジサーバーID
(参考情報)
judge7 / judge5
このコードへのチャレンジ
(要ログイン)
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 #

import sys
input = lambda: sys.stdin.readline().rstrip()
# sys.setrecursionlimit(10**7)
# sys.set_int_max_str_digits(10**6)
# import pypyjit
# pypyjit.set_param('max_unroll_recursion=-1')
def mp():return map(int,input().split())
def lmp():return list(map(int,input().split()))
def lm1(LIST): return list(map(lambda x:x-1, LIST))
def mps(A):return [tuple(map(int, input().split())) for _ in range(A)]
def stoi(LIST):return list(map(int,LIST))
def itos(LIST):return list(map(str,LIST))
def atoi(LIST): return [ord(i)-ord("a") for i in LIST]
def Atoi(LIST): return [ord(i)-ord("A") for i in LIST]
def LT(LIST,N): return LIST[bisect.bisect_left(LIST,N)-1]
def LE(LIST,N): return LIST[bisect.bisect_right(LIST,N)-1]
def GT(LIST,N): return LIST[bisect.bisect_right(LIST,N)]
def GE(LIST,N): return LIST[bisect.bisect_left(LIST,N)]
def bitA(X,A):return X & 1<<A == 1<<A
def gtoi(x,y,h,w):return x*w+y
import math
import bisect
import heapq
import time
import random as rd
import itertools
from copy import copy as cc
from copy import deepcopy as dc
from itertools import accumulate, product
from collections import Counter, defaultdict, deque
# from atcoder.dsu import DSU
# from atcoder.fenwicktree import FenwickTree
# from atcoder.segtree import SegTree  # (op, ide_ele, LIST)
# from atcoder.lazysegtree import LazySegTree  # (op, ide_ele, mapping, composition, _id, lst)
def ceil(U,V):return (U+V-1)//V
def modf1(N,MOD):return (N-1)%MOD+1
def pmat(list):
    for i in list:print(*i)
m4 = [[1,0],[0,1],[-1,0],[0,-1]]
m8 = [[-1,-1],[-1,0],[-1,1],[0,-1],[0,1],[1,-1],[1,0],[1,1]]
inf = (1<<63)-1
mod = 998244353

import heapq
def dijkstra(start,edge):
    # edge[i] = [(distance, j), ...]
    dist = [inf]*len(edge)
    dist[start] = 0
    q = [(0, start)]
    while q:
        # u から v に辺を張る
        cost, u = heapq.heappop(q)
        if dist[u] < cost:continue
        for ncost, v in edge[u]:
            if (dist[u]+ncost) < dist[v]:
                dist[v] = dist[u]+ncost
                heapq.heappush(q, (dist[v], v))
    return dist

n,m,p,y = mp()
edge = [[] for i in range(n)]
for i in range(m):
    a,b,c = mp()
    a -= 1
    b -= 1
    edge[a].append((c,b))
    edge[b].append((c,a))
D = dijkstra(0,edge)
ans = 0
for i in range(p):
    d,e = mp()
    d -= 1
    ans = max(ans,(y-D[d])//e)
print(ans)

0