結果
| 問題 |
No.1917 LCMST
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2022-04-30 01:27:33 |
| 言語 | Java (openjdk 23) |
| 結果 |
AC
|
| 実行時間 | 3,780 ms / 4,000 ms |
| コード長 | 5,098 bytes |
| コンパイル時間 | 2,608 ms |
| コンパイル使用メモリ | 84,352 KB |
| 実行使用メモリ | 137,844 KB |
| 最終ジャッジ日時 | 2024-10-12 21:24:44 |
| 合計ジャッジ時間 | 95,479 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / judge5 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 42 |
ソースコード
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.NoSuchElementException;
public class Main implements Runnable { //Runnableを実装する
public static void main(String[] args) {
// new Thread(null, new Main(), "", 16 * 1024 * 1024).start(); //16MBスタックを確保して実行
new Main().run();
}
long gcd(long a, long b) {
return a==0?b:gcd(b%a, a);
}
class DSU {
int[] parent;
public DSU(int n) {
parent=new int[n];
Arrays.fill(parent, -1);
}
int root(int x) {
return parent[x] < 0 ? x : (parent[x]=root(parent[x]));
}
boolean equiv(int x, int y) {
return root(x)==root(y);
}
void union(int x, int y) {
x=root(x);y=root(y);
if (x==y) return;
if (parent[x] < parent[y]) {
x^=y;y^=x;x^=y;
}
parent[y]+=parent[x];
parent[x]=y;
}
}
final int AMAX=100000;
public void run() {
long ans = 0;
FastScanner sc=new FastScanner();
int N=sc.nextInt();
long[] A=new long[N];
ArrayList<Integer>[] list=new ArrayList[AMAX+1];
ArrayList<Integer>[] rev=new ArrayList[AMAX+1];
for (int i=0;i<=AMAX;++i) list[i]=new ArrayList<>();
for (int i=0;i<=AMAX;++i) rev[i]=new ArrayList<>();
for (int i=0;i<N;++i) A[i]=sc.nextInt();
Arrays.sort(A);
for (int i = 0; i < N; ++i) {
int j = i;
while (j + 1 < N && A[i] == A[j + 1]) ++j;
ans += A[i] * (j - i);
i = j;
}
A = Arrays.stream(A).distinct().toArray();
N = A.length;
for (int i=0;i<N;++i) rev[(int)A[i]].add(i);
for (int div = 1; div <= AMAX; ++div) {
for (int v = 1; v * div <= AMAX; ++v) {
for (int id : rev[v * div]) list[div].add(id);
}
}
DSU dsu = new DSU(N);
for (int t = 0; t < 30; ++t) {
long[][] e=new long[N][3];
for (int i=0;i<N;++i) {
e[i][0]=i;
e[i][1]=e[i][2]=-1;
}
for (int gcd=1;gcd<=AMAX;++gcd) {
int dst=-1;
for (int i : list[gcd]) {
if (dst == -1 || A[i] < A[dst]) dst=i;
}
for (int i : list[gcd]) {
if (dsu.equiv(i, dst)) continue;
int src = dsu.root(i);
if (e[src][1] == -1 || e[src][2] > A[i] * A[dst] / gcd) {
e[src][1] = dst;
e[src][2] = A[i] * A[dst] / gcd;
}
}
if (dst == -1) continue;
int dst_root=dsu.root(dst);
for (int i : list[gcd]) {
if (dsu.equiv(i, dst)) continue;
if (e[dst_root][1] == -1 || e[dst_root][2] > A[i] * A[dst] / gcd) {
e[dst_root][1] = i;
e[dst_root][2] = A[i] * A[dst] / gcd;
}
}
}
Arrays.sort(e, (x, y) -> Long.compare(x[2], y[2]));
for (int i = 0; i < N; ++i) {
int src = (int) e[i][0];
int dst = (int) e[i][1];
long cost = e[i][2];
if (dst == -1) continue;
if (dsu.equiv(src, dst)) continue;
ans += cost;
dsu.union(src, dst);
}
}
System.out.println(ans);
}
void tr(Object ... o) {System.out.println(Arrays.deepToString(o));}
}
class FastScanner {
private final InputStream in = System.in;
private final byte[] buffer = new byte[1024];
private int ptr = 0;
private int buflen = 0;
private boolean hasNextByte() {
if (ptr < buflen) {
return true;
}else{
ptr = 0;
try {
buflen = in.read(buffer);
} catch (IOException e) {
e.printStackTrace();
}
if (buflen <= 0) {
return false;
}
}
return true;
}
private int readByte() { if (hasNextByte()) return buffer[ptr++]; else return -1;}
private static boolean isPrintableChar(int c) { return 33 <= c && c <= 126;}
public boolean hasNext() { while(hasNextByte() && !isPrintableChar(buffer[ptr])) ptr++; return hasNextByte();}
public String next() {
if (!hasNext()) throw new NoSuchElementException();
StringBuilder sb = new StringBuilder();
int b = readByte();
while(isPrintableChar(b)) {
sb.appendCodePoint(b);
b = readByte();
}
return sb.toString();
}
public long nextLong() {
if (!hasNext()) throw new NoSuchElementException();
long n = 0;
boolean minus = false;
int b = readByte();
if (b == '-') {
minus = true;
b = readByte();
}
if (b < '0' || '9' < b) {
throw new NumberFormatException();
}
while(true){
if ('0' <= b && b <= '9') {
n *= 10;
n += b - '0';
}else if(b == -1 || !isPrintableChar(b)){
return minus ? -n : n;
}else{
throw new NumberFormatException();
}
b = readByte();
}
}
public int nextInt() {
long nl = nextLong();
if (nl < Integer.MIN_VALUE || nl > Integer.MAX_VALUE) throw new NumberFormatException();
return (int) nl;
}
public double nextDouble() { return Double.parseDouble(next());}
}