結果
| 問題 | No.468 役に立つ競技プログラミング実践編 |
| ユーザー |
 Grenache
|
| 提出日時 | 2016-12-18 18:38:37 |
| 言語 | Java21 (openjdk 21) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 5,535 bytes |
| コンパイル時間 | 4,056 ms |
| コンパイル使用メモリ | 81,120 KB |
| 実行使用メモリ | 87,608 KB |
| 最終ジャッジ日時 | 2024-05-08 06:44:18 |
| 合計ジャッジ時間 | 16,805 ms |
|
ジャッジサーバーID （参考情報） |
judge4 / judge3 |
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テストケース
テストケース表示| 入力 | 結果 | 実行時間 実行使用メモリ |
|---|---|---|
| testcase_00 | AC | 103 ms
40,788 KB |
| testcase_01 | AC | 108 ms
41,148 KB |
| testcase_02 | AC | 104 ms
40,680 KB |
| testcase_03 | WA | - |
| testcase_04 | WA | - |
| testcase_05 | WA | - |
| testcase_06 | WA | - |
| testcase_07 | WA | - |
| testcase_08 | WA | - |
| testcase_09 | WA | - |
| testcase_10 | WA | - |
| testcase_11 | WA | - |
| testcase_12 | WA | - |
| testcase_13 | WA | - |
| testcase_14 | WA | - |
| testcase_15 | WA | - |
| testcase_16 | WA | - |
| testcase_17 | WA | - |
| testcase_18 | WA | - |
| testcase_19 | WA | - |
| testcase_20 | WA | - |
| testcase_21 | WA | - |
| testcase_22 | WA | - |
| testcase_23 | WA | - |
| testcase_24 | WA | - |
| testcase_25 | WA | - |
| testcase_26 | WA | - |
| testcase_27 | WA | - |
| testcase_28 | WA | - |
| testcase_29 | WA | - |
| testcase_30 | WA | - |
| testcase_31 | WA | - |
| testcase_32 | WA | - |
| testcase_33 | WA | - |
| testcase_34 | AC | 460 ms
70,948 KB |
| testcase_35 | AC | 135 ms
41,528 KB |
| testcase_36 | AC | 111 ms
41,332 KB |
ソースコード
import java.io.*;
import java.util.*;
public class Main_yukicoder468 {
private static Scanner sc;
private static Printer pr;
private static void solve() {
int n = sc.nextInt();
int m = sc.nextInt();
long[] d = new long[n];
Arrays.fill(d, -1);
List<List<Edge>> edges = new ArrayList<>();
for (int i = 0; i < n; i++) {
edges.add(new ArrayList<>());
}
for (int i = 0; i < m; i++) {
int a = sc.nextInt();
int b = sc.nextInt();
int c = sc.nextInt();
edges.get(a).add(new Edge(a, b, c));
}
Deque<Integer> ts = new ArrayDeque<>();
for (int i = 0; i < n; i++) {
if (d[i] == -1) {
Deque<Integer> st = new ArrayDeque<>();
st.push(i);
while (!st.isEmpty()) {
int e = st.peek();
if (d[e] == -1) {
for (Edge next : edges.get(e)) {
if (d[next.v] == -1) {
st.push(next.v);
}
}
d[e] = 0;
} else {
ts.push(e);
st.pop();
}
}
}
}
final long INF = Long.MAX_VALUE;
Arrays.fill(d, 0);
int s = 0;
d[s] = 0;
for (int e : ts) {
for (Edge next : edges.get(e)) {
d[next.v] = Math.max(d[next.v], d[e] + next.w);
}
}
long[] d2 = new long[n];
Arrays.fill(d2, INF);
List<Integer> ts2 = new ArrayList<>(ts);
d2[ts2.get(n - 1)] = d[ts2.get(n - 1)];
for (int i = n - 1; i >= 0; i--) {
int e = ts2.get(i);
for (Edge next : edges.get(e)) {
d2[e] = Math.min(d2[e], d2[next.v] - next.w);
}
}
int diff = 0;
for (int i = 0; i < n; i++) {
if (d[i] != d2[i]) {
diff++;
}
}
// pr.println(ts);
// pr.println(-d[n - 1]);
pr.printf("%d %d/%d\n", d[n - 1], diff, n);
}
private static class Edge {
@SuppressWarnings("unused")
int u; // from
int v; // to
int w; // cost
Edge(int u, int v, int w) {
this.u = u;
this.v = v;
this.w = w;
}
}
// ---------------------------------------------------
public static void main(String[] args) {
sc = new Scanner(System.in);
pr = new Printer(System.out);
solve();
pr.close();
sc.close();
}
@SuppressWarnings("unused")
private static class Scanner {
BufferedReader br;
Scanner (InputStream in) {
br = new BufferedReader(new InputStreamReader(in));
}
private boolean isPrintable(int ch) {
return ch >= '!' && ch <= '~';
}
private boolean isCRLF(int ch) {
return ch == '\n' || ch == '\r' || ch == -1;
}
private int nextPrintable() {
try {
int ch;
while (!isPrintable(ch = br.read())) {
if (ch == -1) {
throw new NoSuchElementException();
}
}
return ch;
} catch (IOException e) {
throw new NoSuchElementException();
}
}
String next() {
try {
int ch = nextPrintable();
StringBuilder sb = new StringBuilder();
do {
sb.appendCodePoint(ch);
} while (isPrintable(ch = br.read()));
return sb.toString();
} catch (IOException e) {
throw new NoSuchElementException();
}
}
int nextInt() {
try {
// parseInt from Integer.parseInt()
boolean negative = false;
int res = 0;
int limit = -Integer.MAX_VALUE;
int radix = 10;
int fc = nextPrintable();
if (fc < '0') {
if (fc == '-') {
negative = true;
limit = Integer.MIN_VALUE;
} else if (fc != '+') {
throw new NumberFormatException();
}
fc = br.read();
}
int multmin = limit / radix;
int ch = fc;
do {
int digit = ch - '0';
if (digit < 0 || digit >= radix) {
throw new NumberFormatException();
}
if (res < multmin) {
throw new NumberFormatException();
}
res *= radix;
if (res < limit + digit) {
throw new NumberFormatException();
}
res -= digit;
} while (isPrintable(ch = br.read()));
return negative ? res : -res;
} catch (IOException e) {
throw new NoSuchElementException();
}
}
long nextLong() {
try {
// parseLong from Long.parseLong()
boolean negative = false;
long res = 0;
long limit = -Long.MAX_VALUE;
int radix = 10;
int fc = nextPrintable();
if (fc < '0') {
if (fc == '-') {
negative = true;
limit = Long.MIN_VALUE;
} else if (fc != '+') {
throw new NumberFormatException();
}
fc = br.read();
}
long multmin = limit / radix;
int ch = fc;
do {
int digit = ch - '0';
if (digit < 0 || digit >= radix) {
throw new NumberFormatException();
}
if (res < multmin) {
throw new NumberFormatException();
}
res *= radix;
if (res < limit + digit) {
throw new NumberFormatException();
}
res -= digit;
} while (isPrintable(ch = br.read()));
return negative ? res : -res;
} catch (IOException e) {
throw new NoSuchElementException();
}
}
float nextFloat() {
return Float.parseFloat(next());
}
double nextDouble() {
return Double.parseDouble(next());
}
String nextLine() {
try {
int ch;
while (isCRLF(ch = br.read())) {
if (ch == -1) {
throw new NoSuchElementException();
}
}
StringBuilder sb = new StringBuilder();
do {
sb.appendCodePoint(ch);
} while (!isCRLF(ch = br.read()));
return sb.toString();
} catch (IOException e) {
throw new NoSuchElementException();
}
}
void close() {
try {
br.close();
} catch (IOException e) {
// throw new NoSuchElementException();
}
}
}
private static class Printer extends PrintWriter {
Printer(PrintStream out) {
super(out);
}
}
}