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Swap.java
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Swap.java
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import java.util.List;
public class Swap {
public boolean checkSorted(List<Integer> arr) {
int swaps=0;
int n=arr.size();
for(int i=0;i<n;i++){
int swapIndex=i;
int swapIndexValue=arr.get(i);
for(int j=i+1;j<n;j++){
if(arr.get(j)<arr.get(i) && arr.get(j) < swapIndexValue){
swapIndex=j;
swapIndexValue=arr.get(j);
}
}
if(swapIndex!=i){
arr.set(swapIndex,arr.get(i));
arr.set(i,swapIndexValue);
swaps++;
}
if(swaps > 2)
return false;
}
if(swaps==2 || swaps==0)
return true;
return false;
}
public boolean isSorted(List<Integer> arr) {
for (int i = 1; i < arr.size(); i++) {
if (arr.get(i) < arr.get(i-1)) return false;
}
return true;
}
public void swap(List<Integer> arr, int i, int j) {
int temp = arr.get(i);
arr.set(i, arr.get(j));
arr.set(j, temp);
}
}
}