結果
| 問題 |
No.1065 電柱 / Pole (Easy)
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2020-05-29 21:34:15 |
| 言語 | D (dmd 2.109.1) |
| 結果 |
AC
|
| 実行時間 | 440 ms / 2,000 ms |
| コード長 | 2,538 bytes |
| コンパイル時間 | 2,746 ms |
| コンパイル使用メモリ | 184,616 KB |
| 実行使用メモリ | 24,436 KB |
| 最終ジャッジ日時 | 2024-06-22 07:11:40 |
| 合計ジャッジ時間 | 12,427 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge5 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 2 |
| other | AC * 46 |
ソースコード
import std.conv, std.functional, std.range, std.stdio, std.string;
import std.algorithm, std.array, std.bigint, std.bitmanip, std.complex, std.container, std.math, std.mathspecial, std.numeric, std.regex, std.typecons;
import core.bitop;
class EOFException : Throwable { this() { super("EOF"); } }
string[] tokens;
string readToken() { for (; tokens.empty; ) { if (stdin.eof) { throw new EOFException; } tokens = readln.split; } auto token = tokens.front; tokens.popFront; return token; }
int readInt() { return readToken.to!int; }
long readLong() { return readToken.to!long; }
real readReal() { return readToken.to!real; }
bool chmin(T)(ref T t, in T f) { if (t > f) { t = f; return true; } else { return false; } }
bool chmax(T)(ref T t, in T f) { if (t < f) { t = f; return true; } else { return false; } }
int binarySearch(alias pred, T)(in T[] as) { int lo = -1, hi = cast(int)(as.length); for (; lo + 1 < hi; ) { const mid = (lo + hi) >> 1; (unaryFun!pred(as[mid]) ? hi : lo) = mid; } return hi; }
int lowerBound(T)(in T[] as, T val) { return as.binarySearch!(a => (a >= val)); }
int upperBound(T)(in T[] as, T val) { return as.binarySearch!(a => (a > val)); }
void main() {
try {
for (; ; ) {
const N = readInt();
const M = readInt();
const S = readInt() - 1;
const T = readInt() - 1;
auto X = new real[N];
auto Y = new real[N];
foreach (u; 0 .. N) {
X[u] = readReal();
Y[u] = readReal();
}
auto A = new int[M];
auto B = new int[M];
foreach (i; 0 .. M) {
A[i] = readInt() - 1;
B[i] = readInt() - 1;
}
auto G = new int[][N];
foreach (i; 0 .. M) {
G[A[i]] ~= i;
G[B[i]] ~= i;
}
alias Entry = Tuple!(real, "c", int, "u");
BinaryHeap!(Array!Entry, "a > b") que;
auto dist = new real[N];
auto vis = new bool[N];
dist[] = real.infinity;
dist[S] = 0.0L;
que.insert(Entry(0.0L, S));
for (; !que.empty; ) {
const c = que.front.c;
const u = que.front.u;
que.removeFront;
if (!vis[u]) {
vis[u] = true;
foreach (i; G[u]) {
const v = A[i] ^ B[i] ^ u;
if (!vis[v]) {
const cc = c + sqrt((X[v] - X[u])^^2 + (Y[v] - Y[u])^^2);
if (chmin(dist[v], cc)) {
que.insert(Entry(cc, v));
}
}
}
}
}
writefln("%.12f", dist[T]);
}
} catch (EOFException e) {
}
}