蓝桥杯练习系统(入门)
2017-03-24 12:26
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1 A+B
import java.util.Scanner;
/**
* Created by m1786 on 2017/3/3.
*/
public class Main{
public static void main(String args[]){
int a,b;
Scanner sc=new Scanner(System.in);
a=sc.nextInt();
b=sc.nextInt();
System.out.println(a+b);
}
}
2.序列求和
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
/**
* Created by 飞龙 on 2017/1/9.
*/
public class Main {
public static void main(String args[]) throws NumberFormatException, IOException {
BufferedReader strin = new BufferedReader(new InputStreamReader(System.in));
long i = Integer.parseInt(strin.readLine());
long sum = (1+i)*i/2;
System.out.println(sum);
}
}
3.圆的面积
import java.util.Scanner;
import static java.lang.String.format;
/**
* Created by m1786 on 2017/3/4.
*/
public class Main
{
public static void main(String args[]){
double PI=3.14159265358979323;
Scanner sc=new Scanner(System.in);
int r=sc.nextInt();
System.out.println(format("%.7f",PI*r*r));
}
}
import java.text.DecimalFormat;
import java.util.*;
public class Main {
final static double pi = 3.14159265358979323;
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int r = sc.nextInt();
double s = pi * r * r;
DecimalFormat df = new DecimalFormat("#.0000000");
System.out.println(df.format(s));
}
}
4.斐波那契
import java.util.Scanner;
public class Main {
public static void main(String args[]){
int n;
int x[]=new int[1000000];
x[1]=1;
x[2]=1;
Scanner sc=new Scanner(System.in);
n=sc.nextInt();
for(int i=3;i<=n;i++){
x[i]=(x[i-1]%10007+x[i-2]%10007)%10007;
}
System.out.print(x
);
}
}
import java.util.Scanner;
/**
* Created by m1786 on 2017/3/3.
*/
public class Main{
public static void main(String args[]){
int a,b;
Scanner sc=new Scanner(System.in);
a=sc.nextInt();
b=sc.nextInt();
System.out.println(a+b);
}
}
2.序列求和
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
/**
* Created by 飞龙 on 2017/1/9.
*/
public class Main {
public static void main(String args[]) throws NumberFormatException, IOException {
BufferedReader strin = new BufferedReader(new InputStreamReader(System.in));
long i = Integer.parseInt(strin.readLine());
long sum = (1+i)*i/2;
System.out.println(sum);
}
}
3.圆的面积
import java.util.Scanner;
import static java.lang.String.format;
/**
* Created by m1786 on 2017/3/4.
*/
public class Main
{
public static void main(String args[]){
double PI=3.14159265358979323;
Scanner sc=new Scanner(System.in);
int r=sc.nextInt();
System.out.println(format("%.7f",PI*r*r));
}
}
import java.text.DecimalFormat;
import java.util.*;
public class Main {
final static double pi = 3.14159265358979323;
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int r = sc.nextInt();
double s = pi * r * r;
DecimalFormat df = new DecimalFormat("#.0000000");
System.out.println(df.format(s));
}
}
4.斐波那契
import java.util.Scanner;
public class Main {
public static void main(String args[]){
int n;
int x[]=new int[1000000];
x[1]=1;
x[2]=1;
Scanner sc=new Scanner(System.in);
n=sc.nextInt();
for(int i=3;i<=n;i++){
x[i]=(x[i-1]%10007+x[i-2]%10007)%10007;
}
System.out.print(x
);
}
}
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