結果
| 問題 |
No.1103 Directed Length Sum
|
| コンテスト | |
| ユーザー |
shojin_pro
|
| 提出日時 | 2020-07-03 23:03:09 |
| 言語 | Java (openjdk 23) |
| 結果 |
TLE
|
| 実行時間 | - |
| コード長 | 2,455 bytes |
| コンパイル時間 | 2,318 ms |
| コンパイル使用メモリ | 77,544 KB |
| 実行使用メモリ | 76,912 KB |
| 最終ジャッジ日時 | 2024-09-17 04:43:58 |
| 合計ジャッジ時間 | 7,837 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 | TLE * 1 -- * 21 |
ソースコード
import java.util.*;
import java.io.*;
public class Main {
static boolean[] arrived;
static long[] cum;
public static void main(String[] args) throws Exception {
FastScanner sc = new FastScanner(System.in);
int n = sc.nextInt();
int[] from = new int[n+1];
cum = new long[n+1];
for(int i = 1; i <= n; i++){
cum[i] += cum[i-1]+i;
}
for(int i = 0; i < n-1; i++){
int a = sc.nextInt();
int b = sc.nextInt();
from[b] = a;
}
long ans = 0;
for(int i = 1; i <= n; i++){
int cnt = 0;
int now = i;
while(from[now] != 0){
now = from[now];
cnt++;
}
ans += cum[cnt];
}
System.out.println(ans);
}
}
class FastScanner {
private BufferedReader reader = null;
private StringTokenizer tokenizer = null;
public FastScanner(InputStream in) {
reader = new BufferedReader(new InputStreamReader(in));
tokenizer = null;
}
public String next() {
if (tokenizer == null || !tokenizer.hasMoreTokens()) {
try {
tokenizer = new StringTokenizer(reader.readLine());
} catch (IOException e) {
throw new RuntimeException(e);
}
}
return tokenizer.nextToken();
}
public String nextLine() {
if (tokenizer == null || !tokenizer.hasMoreTokens()) {
try {
return reader.readLine();
} catch (IOException e) {
throw new RuntimeException(e);
}
}
return tokenizer.nextToken("\n");
}
public long nextLong() {
return Long.parseLong(next());
}
public int nextInt() {
return Integer.parseInt(next());
}
public double nextDouble() {
return Double.parseDouble(next());
}
public String[] nextArray(int n) {
String[] a = new String[n];
for (int i = 0; i < n; i++)
a[i] = next();
return a;
}
public int[] nextIntArray(int n) {
int[] a = new int[n];
for (int i = 0; i < n; i++)
a[i] = nextInt();
return a;
}
public long[] nextLongArray(int n) {
long[] a = new long[n];
for (int i = 0; i < n; i++)
a[i] = nextLong();
return a;
}
}
shojin_pro