java
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int n = sc.nextInt();
int q = sc.nextInt();
int[] res = new int[n];
for(int i=0;i<n;i++)
res[i] = sc.nextInt();
while(q-- != 0) {
int m = sc.nextInt();
//先找左端点再找右端点
int l = 0,r = n-1;
while(l<r) {
int mid = (l+r)/2;
if(res[mid]>=m) r = mid;
else l = mid + 1;
}
//l和r相等
if(res[l] == m) {
System.out.print(l+" ");
//缩小搜索范围到(左端点到n-1)
r = n-1;
while(l<r) {
int mid = (l+r+1)/2;//+1
if(res[mid]<=m) l = mid;
else r = mid-1;
}
System.out.println(r);
}else {
System.out.println("-1 -1");
}
}
}
}
java
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
double n = sc.nextDouble();
double l = -10000,r = 10000;
while((r-l)>1e-8) {//保留6位多写两位
double mid = (l+r)/2;
if((mid*mid*mid) >= n) r = mid;//!!
else l = mid;
}
System.out.printf("%.6f",l);
}
}
java
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
public class Main {
public static void main(String[] args) throws IOException{
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
PrintWriter pw = new PrintWriter(new OutputStreamWriter(System.out));
String[] s1 = br.readLine().split(" ");
int n = Integer.parseInt(s1[0]);
int m = Integer.parseInt(s1[1]);
int[] res = new int[n+1];
String[] s2 = br.readLine().split(" ");
for(int i=1;i<=n;i++)
res[i] = Integer.parseInt(s2[i-1]);
String[] s3 = br.readLine().split(" ");
int k = 0;
while(m-- != 0) {
int z = Integer.parseInt(s3[k++]);
int l = 1,r = n;
while(l<r) {
int mid = (l+r)/2;
if(res[mid] >= z) r = mid;
else l = mid + 1;
}
if(res[l] == z) {
System.out.print(l+" ");
}else {
System.out.print("-1 ");
}
}
}
}