#45643 (Java21) No.170 スワップ文字列(Easy)

• 問題: No.170 スワップ文字列(Easy)
• ユーザー: holeguma
• 提出日時: 2015-08-26 01:20:36
• 言語: Java21 (openjdk 21)
• 結果: AC
• 実行時間: 44 ms / 5,000 ms
• コード長: 2,687 bytes
• コンパイル時間: 2,413 ms
• コンパイル使用メモリ: 75,924 KB
• 実行使用メモリ: 50,056 KB
• 最終ジャッジ日時: 2023-08-24 16:21:53
• 合計ジャッジ時間: 4,429 ms
• ジャッジサーバーID （参考情報）: judge12 / judge13

入力	結果	実行時間; 実行使用メモリ
testcase_00	AC	42 ms; 49,660 KB
testcase_01	AC	43 ms; 49,532 KB
testcase_02	AC	44 ms; 49,548 KB
testcase_03	AC	43 ms; 49,560 KB
testcase_04	AC	43 ms; 49,596 KB
testcase_05	AC	43 ms; 49,632 KB
testcase_06	AC	43 ms; 49,716 KB
testcase_07	AC	43 ms; 49,584 KB
testcase_08	AC	42 ms; 49,532 KB
testcase_09	AC	43 ms; 49,492 KB
testcase_10	AC	44 ms; 49,924 KB
testcase_11	AC	44 ms; 49,556 KB
testcase_12	AC	43 ms; 50,056 KB
testcase_13	AC	43 ms; 49,508 KB
testcase_14	AC	43 ms; 49,572 KB
testcase_15	AC	43 ms; 49,284 KB
testcase_16	AC	43 ms; 49,532 KB
testcase_17	AC	43 ms; 49,528 KB
testcase_18	AC	44 ms; 49,320 KB
testcase_19	AC	44 ms; 49,408 KB
testcase_20	AC	43 ms; 49,552 KB
testcase_21	AC	44 ms; 49,656 KB
testcase_22	AC	44 ms; 49,444 KB
testcase_23	AC	44 ms; 49,492 KB

ソースコード

import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayDeque;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Comparator;
import java.util.Deque;
import java.util.HashMap;
import java.util.InputMismatchException;
import java.util.Map;
import java.util.PriorityQueue;
import java.math.BigInteger;
    
public class Main{

static final InputStream in=System.in;
static final PrintWriter out=new PrintWriter(System.out);
static final int INF=Integer.MAX_VALUE/2;
static final long LINF=Long.MAX_VALUE/2;
    
public static void main(String[] args) throws IOException{
InputReader ir=new InputReader(in);
String str=ir.next();
BigInteger ans=fact(str.length());
HashMap<Character,Integer> map=new HashMap<Character,Integer>();
for(int i=0;i<str.length();i++){
char c=str.charAt(i);
if(!map.containsKey(c)) map.put(c,1);
else map.put(c,map.get(c)+1);
}
for(Map.Entry<Character,Integer> e : map.entrySet()) ans=ans.divide(fact(e.getValue()));
out.println(ans.subtract(BigInteger.ONE));
out.flush();
}

public static BigInteger fact(int n){
BigInteger a=BigInteger.ONE;
for(int i=2;i<=n;i++){
a=a.multiply(BigInteger.valueOf(i));
}
return a;
}

static class InputReader {
private InputStream in;
private byte[] buffer=new byte[1024];
private int curbuf;
private int lenbuf;

public InputReader(InputStream in) {this.in=in;}
  
public int readByte() {
if(lenbuf==-1) throw new InputMismatchException();
if(curbuf>=lenbuf){
curbuf= 0;
try{
lenbuf=in.read(buffer);
}
catch (IOException e) {
throw new InputMismatchException();
}
if(lenbuf<=0)
return -1;
}
return buffer[curbuf++];
}

public boolean isSpaceChar(int c){return !(c>=33&&c<=126);}

private int skip() {int b; while((b = readByte())!=-1&&isSpaceChar(b)); return b;}

public String next() {
int b=skip();
StringBuilder sb=new StringBuilder();
while(!isSpaceChar(b)){
sb.appendCodePoint(b);
b=readByte();
}
return sb.toString();
}
 
public int nextInt() {
int c=readByte();
while (isSpaceChar(c)) c=readByte();
boolean minus=false;
if (c=='-') {
minus=true;
c=readByte();
}
int res=0;
do{
if(c<'0'||c>'9') throw new InputMismatchException();
res=res*10+c-'0';
c=readByte();
}while(!isSpaceChar(c));
return (minus)?-res:res;
}

public long nextLong() {
int c=readByte();
while (isSpaceChar(c)) c=readByte();
boolean minus=false;
if (c=='-') {
minus=true;
c=readByte();
}
long res = 0;
do{
if(c<'0'||c>'9') throw new InputMismatchException();
res=res*10+c-'0';
c=readByte();
}while(!isSpaceChar(c));
return (minus)?-res:res;
}

public int[] toIntArray(int n){
int[] a=new int[n];
for(int i=0;i<n;i++) a[i]=nextInt();
return a;
}
}
}