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public static void findStudent(int key, int[] studentList) {
final long startTime = System.nanoTime();
int N = studentList.length;
for(int i = 0; i < N; i++) {
if(studentList[i] == key) {
System.out.println("Key has been found");
} else System.out.println(" Key was not found ");
final long endTime = System.nanoTime();
System.out.println("Total execution time: " + (endTime - startTime) );
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