結果
| 問題 |
No.461 三角形はいくつ？
|
| コンテスト | |
| ユーザー |
 Grenache
|
| 提出日時 | 2016-12-12 19:00:50 |
| 言語 | Java (openjdk 23) |
| 結果 |
AC
|
| 実行時間 | 650 ms / 5,000 ms |
| コード長 | 6,617 bytes |
| コンパイル時間 | 4,129 ms |
| コンパイル使用メモリ | 81,016 KB |
| 実行使用メモリ | 55,668 KB |
| 最終ジャッジ日時 | 2024-11-29 17:03:56 |
| 合計ジャッジ時間 | 21,998 ms |
|
ジャッジサーバーID （参考情報） |
judge4 / judge5 |
（要ログイン）
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | AC * 41 |
ソースコード
import java.io.*;
import java.util.*;
public class Main_yukicoder461 {
private static Scanner sc;
private static Printer pr;
private static void solve() {
int n = sc.nextInt();
List<List<Pair>> ab = new ArrayList<>();
for (int i = 0; i < 3; i++) {
ab.add(new ArrayList<>());
}
for (int i = 0; i < n; i++) {
int p = sc.nextInt();
int a = sc.nextInt();
int b = sc.nextInt();
ab.get(p).add(new Pair(a, a + b));
}
for (int i = 0; i < 3; i++) {
ab.get(i).add(new Pair(1, 1));
Collections.sort(ab.get(i));
}
long ret = 0;
for (int i = 0; i < 3; i++) {
ret += ab.get(i).size();
// pr.printf("%d %d\n", i, ab.get(i).size());
ret += cnt(ab.get(i), ab.get((i - 1 + 3) % 3));
// pr.printf("%d %d\n", i, cnt(ab.get(i), ab.get((i - 1 + 3) % 3)));
ret += cnt(ab.get(i), ab.get((i + 1) % 3));
// pr.printf("%d %d\n", i, cnt(ab.get(i), ab.get((i + 1) % 3)));
}
Pair e1b = new Pair(0, 0);
Pair e2b = new Pair(0, 0);
for (int i = 0; i < 3; i++) {
for (Pair e1 : ab.get((i + 1) % 3)) {
e1b.a = e1.ab - e1.a;
e1b.ab = e1.ab;
if (e1b.a == 0) {
continue;
}
for (Pair e2 : ab.get((i + 2) % 3)) {
e2b.a = e2.ab - e2.a;
e2b.ab = e2.ab;
if (e2b.a == 0) {
continue;
}
ret += cnt2(e1b, e2b, ab.get(i));
}
}
}
// pr.println(ret);
pr.println(ret / 3);
}
private static int cnt(List<Pair> l1, List<Pair> l2) {
int ret = 0;
int n = l1.size();
// Pair tmp = new Pair(0, 0);
for (Pair e2 : l2) {
tmp.a = e2.ab - e2.a;
tmp.ab = e2.ab;
if (tmp.a == 0) {
continue;
}
int index = Collections.binarySearch(l1, tmp);
if (index >= 0) {
ret += n - (index + 1);
} else {
index = -(index + 1);
ret += n - index;
}
}
return ret;
}
private static Pair tmp = new Pair(0, 0);
private static Pair tmpone = new Pair(1, 1);
private static int cnt2(Pair e1b, Pair e2b, List<Pair> l) {
int ret = 0;
int n = l.size();
if (n == 0) {
return 0;
}
tmp.a = e1b.a * e2b.ab + e2b.a * e1b.ab;
tmp.ab = e1b.ab * e2b.ab;
if (tmp.compareTo(tmpone) > 0) {
return 0;
}
Pair max;
if (e1b.compareTo(e2b) > 0) {
max = e1b;
} else {
max = e2b;
}
int index = Collections.binarySearch(l, tmp);
if (index >= 0) {
ret += n - (index + 1);
} else {
index = -(index + 1);
ret += n - index;
}
int index2 = Collections.binarySearch(l, max);
if (index2 >= 0) {
ret += index - index2;
} else {
index2 = -(index2 + 1);
ret += index - index2;
}
// if (tmp.compareTo(tmpone) < 0) {
// ret++;
// }
return ret;
}
private static class Pair implements Comparable<Pair> {
long a;
long ab;
Pair(long a, long ab) {
this.a = a;
this.ab = ab;
}
@Override
public int compareTo(Pair o) {
// return Long.compare(a * (o.a + o.b), o.a * (a + b));
return Long.compare(a * o.ab, o.a * ab);
}
}
// ---------------------------------------------------
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);
}
}
}