結果
| 問題 |
No.748 yuki国のお財布事情
|
| コンテスト | |
| ユーザー |
htensai
|
| 提出日時 | 2020-01-30 18:18:51 |
| 言語 | Java (openjdk 23) |
| 結果 |
AC
|
| 実行時間 | 538 ms / 2,000 ms |
| コード長 | 2,961 bytes |
| コンパイル時間 | 2,455 ms |
| コンパイル使用メモリ | 77,936 KB |
| 実行使用メモリ | 49,532 KB |
| 最終ジャッジ日時 | 2024-09-16 03:46:10 |
| 合計ジャッジ時間 | 9,743 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / judge4 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 26 |
ソースコード
import java.util.*;
import java.io.*;
public class Main {
static int[] dp;
public static void main(String[] args) throws Exception {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
String[] first = br.readLine().split(" ", 3);
int n = Integer.parseInt(first[0]);
int m = Integer.parseInt(first[1]);
int k = Integer.parseInt(first[2]);
Route[] routes = new Route[m];
long total = 0;
for (int i = 0; i < m; i++) {
routes[i] = new Route(br.readLine());
total += routes[i].cost;
}
UnionFindTree uft = new UnionFindTree(n);
for (int i = 0; i < k; i++) {
int idx = Integer.parseInt(br.readLine()) - 1;
uft.unite(routes[idx]);
total -= routes[idx].cost;
routes[idx].cost = Integer.MAX_VALUE;
}
Arrays.sort(routes);
for (int i = 0; i < m && !uft.isFull(); i++) {
if (!uft.same(routes[i])) {
total -= routes[i].cost;
uft.unite(routes[i]);
}
}
System.out.println(total);
}
static class UnionFindTree {
int[] parents;
int[] counts;
public UnionFindTree(int size) {
parents = new int[size];
counts = new int[size];
for (int i = 0; i < size; i++) {
parents[i] = i;
counts[i] = 1;
}
}
public int find(int x) {
if (parents[x] == x) {
return x;
} else {
return parents[x] = find(parents[x]);
}
}
public boolean same(int x, int y) {
return find(x) == find(y);
}
public boolean same(Route r) {
return same(r.left, r.right);
}
public void unite(int x, int y) {
int xx = find(x);
int yy = find(y);
if (xx == yy) {
return;
} else if (xx > yy) {
parents[xx] = yy;
counts[yy] += parents[xx];
} else {
parents[yy] = xx;
counts[xx] += parents[yy];
}
}
public void unite(Route r) {
unite(r.left, r.right);
}
public boolean isFull() {
return counts[0] == counts.length;
}
}
static class Route implements Comparable<Route> {
int left;
int right;
int cost;
public Route(String s) {
String[] arr = s.split(" ", 3);
left = Integer.parseInt(arr[0]) - 1;
right = Integer.parseInt(arr[1]) - 1;
cost = Integer.parseInt(arr[2]);
}
public int compareTo(Route another) {
return cost - another.cost;
}
}
}
htensai