import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; public class Main { public static void main(String[] args) throws IOException { BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); int n = Integer.parseInt(br.readLine()); String[] s = br.readLine().split(" "); String aim = br.readLine(); int flag = 0; for (int i = 0; i < s.length; i++) { if (s[i].equals(aim)) { System.out.println(i); flag = 1; break; } } if (flag == 0) System.out.println(-1); } }
import java.util.*; public class Main { public static void main(String [] args) { Scanner sc=new Scanner(System.in); while(sc.hasNextInt()) { int n=sc.nextInt(); int [] arr=new int[n]; for(int i=0;i<n;i++) { arr[i]=sc.nextInt(); } int x=sc.nextInt(); int index=-1; for(int i=0;i<n;i++) { if(arr[i]==x) { index=i; } } System.out.println(index); } } }
import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); int n = scanner.nextInt(); int[] record = new int[n]; for (int i = 0; i < n; i++) { record[i]=scanner.nextInt(); } int search = scanner.nextInt(); for (int i = 0; i < n; i++) { if (record[i]==search){ System.out.println(i); return; } } System.out.println(-1); } }
import java.util.*; public class FindKey { public static void main(String[] args) { Scanner sc = new Scanner(System.in); int n = sc.nextInt(); int[] array = new int[n]; for (int i = 0; i < n; i++) { array[i] = sc.nextInt(); } int x = sc.nextInt(); findKey(array, x); } public static void findKey(int[] s, int k) { for (int j = 0; j < s.length; j++) { if (s[j] == k) { System.out.println(j); break; } if (j == s.length-1) { System.out.println("-1"); } } } }
import java.util.Scanner;
/**
* @author Allen_Hua
* @create_time 创建时间:May 13, 2018 3:33:02 PM 类说明
*/
public class Main {
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
while (scan.hasNext()) {
int n = scan.nextInt();
int[] data = new int[n];
for (int i = 0; i < data.length; i++) {
data[i] = scan.nextInt();
}
int x = scan.nextInt();
System.out.println(findX(x, data));
}
}
/**
* 找到x的下标 找不到返回-1
**/
private static int findX(int x, int[] data) {
// TODO Auto-generated method stub
for (int i = 0; i < data.length; i++) {
if (x == data[i]) {
return i;
}
}
return -1;
}
}