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minimumSwaps.java
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minimumSwaps.java
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import java.io.*;
import java.math.*;
import java.security.*;
import java.text.*;
import java.util.*;
import java.util.concurrent.*;
import java.util.regex.*;
public class Solution {
// Complete the minimumSwaps function below.
static long minimumSwaps(long[] arr) {
long temp,diff,highDiff,noOfSwaps=0;
int swpIdx;
for(int i=0;i<arr.length-1;i++){
swpIdx=i;highDiff=0;
for(int j=arr.length-1;j>i;j--){
if(arr[i] == i+1){
break;
}
if(arr[j] == j+1){
continue;
}
if(arr[i] > arr[j]){
diff=arr[i]- arr[j];
if(diff > highDiff){
highDiff = diff;
swpIdx = j;
}
}
if((swpIdx != i) && (arr[swpIdx] == (i+1))){
temp=arr[i];
arr[i]=arr[swpIdx];
arr[swpIdx]=temp;
noOfSwaps++;
break;
}
}
//swap the values
}
System.out.println("Minimum Swaps: "+noOfSwaps);
return noOfSwaps;
}
private static final Scanner scanner = new Scanner(System.in);
public static void main(String[] args) throws IOException {
BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(System.getenv("OUTPUT_PATH")));
int n = scanner.nextInt();
scanner.skip("(\r\n|[\n\r\u2028\u2029\u0085])?");
long[] arr = new long[(int)n];
String[] arrItems = scanner.nextLine().split(" ");
scanner.skip("(\r\n|[\n\r\u2028\u2029\u0085])?");
for (int i = 0; i < n; i++) {
long arrItem = Long.parseLong(arrItems[i]);
arr[i] = arrItem;
}
long res = minimumSwaps(arr);
bufferedWriter.write(String.valueOf(res));
bufferedWriter.newLine();
bufferedWriter.close();
scanner.close();
}
}