結果
| 問題 |
No.1690 Power Grid
|
| コンテスト | |
| ユーザー |
tenten
|
| 提出日時 | 2023-06-28 12:56:31 |
| 言語 | Java (openjdk 23) |
| 結果 |
AC
|
| 実行時間 | 386 ms / 3,000 ms |
| コード長 | 3,423 bytes |
| コンパイル時間 | 2,644 ms |
| コンパイル使用メモリ | 84,564 KB |
| 実行使用メモリ | 41,104 KB |
| 最終ジャッジ日時 | 2024-07-05 05:57:27 |
| 合計ジャッジ時間 | 10,254 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge1 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 25 |
ソースコード
import java.io.*;
import java.util.*;
import java.util.stream.*;
public class Main {
public static void main(String[] args) throws Exception {
Scanner sc = new Scanner();
int n = sc.nextInt();
int m = sc.nextInt();
int kk = sc.nextInt();
int[] costs = new int[n];
for (int i = 0; i < n; i++) {
costs[i] = sc.nextInt();
}
long[][] distances = new long[n][n];
for (int i = 0; i < n; i++) {
Arrays.fill(distances[i], Long.MAX_VALUE / 2);
distances[i][i] = 0;
}
for (int i = 0; i < m; i++) {
int a = sc.nextInt() - 1;
int b = sc.nextInt() - 1;
int c = sc.nextInt();
distances[a][b] = Math.min(distances[a][b], c);
distances[b][a] = Math.min(distances[b][a], c);
}
for (int a = 0; a < n; a++) {
for (int b = 0; b < n; b++) {
for (int c = 0; c < n; c++) {
distances[b][c] = Math.min(distances[b][c], distances[b][a] + distances[a][c]);
}
}
}
long[] dp = new long[1 << n];
Arrays.fill(dp, Long.MAX_VALUE);
dp[0] = 0;
long[] ans = new long[n + 1];
Arrays.fill(ans, Long.MAX_VALUE);
ans[0] = 0;
for (int i = 1; i < (1 << n); i++) {
int pop = getPop(i);
for (int j = 0; j < n; j++) {
if ((i & (1 << j)) == 0) {
continue;
}
if (pop == 1) {
dp[i] = costs[j];
break;
}
for (int k = 0; k < n; k++) {
if ((i & (1 << k)) == 0 || j == k) {
continue;
}
dp[i] = Math.min(dp[i], dp[i ^ (1 << j)] + distances[j][k] + costs[j]);
}
}
ans[pop] = Math.min(ans[pop], dp[i]);
}
System.out.println(ans[kk]);
}
static int getPop(int x) {
int pop = 0;
while (x > 0) {
pop += x % 2;
x >>= 1;
}
return pop;
}
}
class Utilities {
static String arrayToLineString(Object[] arr) {
return Arrays.stream(arr).map(x -> x.toString()).collect(Collectors.joining("\n"));
}
static String arrayToLineString(int[] arr) {
return String.join("\n", Arrays.stream(arr).mapToObj(String::valueOf).toArray(String[]::new));
}
}
class Scanner {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
StringTokenizer st = new StringTokenizer("");
StringBuilder sb = new StringBuilder();
public Scanner() throws Exception {
}
public int nextInt() throws Exception {
return Integer.parseInt(next());
}
public long nextLong() throws Exception {
return Long.parseLong(next());
}
public double nextDouble() throws Exception {
return Double.parseDouble(next());
}
public int[] nextIntArray() throws Exception {
return Stream.of(br.readLine().split(" ")).mapToInt(Integer::parseInt).toArray();
}
public String next() throws Exception {
while (!st.hasMoreTokens()) {
st = new StringTokenizer(br.readLine());
}
return st.nextToken();
}
}
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