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import java.util.Scanner;public class Main { public static void main(String[] args) { Scanner reader=new Scanner(System.in); int n,m; n=reader.nextInt(); m=reader.nextInt(); calc c=new calc(); System.out.printf("%d %d",c.gcd(n,m),(n*m)/c.gcd(n,m));}}class calc{ int gcd(int a,int b) { if(b==0) { return a; } return gcd(b,a%b); }} import java.util.Scanner;public class Main { public static void main(String[] args) { Scanner reader=new Scanner(System.in); while(reader.hasNext()) { int n=0,sum=0; n=reader.nextInt(); for(int i=1;i<=n;i++) { int b=1; for(int j=1;j<=i;j++) { b*=j; } sum+=b; } System.out.println(sum); }}} import java.util.Scanner;public class Main { public static void main(String[] args) { Scanner reader=new Scanner(System.in); while(reader.hasNext()) { int n=10,dec=0,num=0; calca c=new calca(); String str; str=reader.next(); char []str1=str.toCharArray(); int []output=new int[33]; int m=reader.nextInt(); for(int i=0;i =0;i--) { System.out.printf("%c",c.int_to_char(output[i])); } System.out.printf("\n"); } }}class calca{ int char_to_int(char a){ return a>='0'&&a<='9'?a-'0':10+a-'A'; } char int_to_char(int a){ return (char) (a<=9?a+'0':a-10+'A'); }} import java.util.Scanner;public class Main { public static void main(String[] args) { Scanner reader=new Scanner(System.in); while(reader.hasNext()) { int m=reader.nextInt(); int x=reader.nextInt(); String str1=Integer.toString(m, x); System.out.println(str1.toUpperCase()); } }} 代码如下（示例）：
import java.util.Scanner;public class Main { public static void main(String[] args) { Scanner reader =new Scanner(System.in); int n=reader.nextInt(); int count=0; for(int i=1;i<=n;i++) { int t=10,flag=0,j=i; while(j!=0) { if(j%10>t) { flag=1; } t=j%10; j/=10; } if(flag==0) { count++; } } System.out.println(count);}} import java.util.Scanner;public class Main { public static void main(String[] args) { Scanner reader=new Scanner(System.in); int n=reader.nextInt(); for(int i=1;i<=n;i++) { int f[]=new int[100000]; f[1]=1;f[2]=1; int m=reader.nextInt(); for(int j=3;j<=m;j++) { f[j]=f[j-1]+f[j-2]; } System.out.println(f[m]); } }} import java.util.Scanner;public class Main { public static void main(String[] args) { Scanner reader=new Scanner(System.in); reader.useDelimiter("\n"); while(reader.hasNext()) { String str; int a=0,b=0,c=0,d=0; str=reader.nextLine(); char []str1=str.toCharArray(); for(int i=0;i ='a'&&str1[i]<='z')||(str1[i]>='A'&&str1[i]<='Z')) { a++; } else if(str1[i]>='0'&&str1[i]<='9') { b++; } else if(str1[i]==' ') { c++; }else { d++; } } System.out.printf("%d %d %d %d\n",a,b,c,d);}}} import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner reader=new Scanner(System.in); int []prime=new int[100000]; int []vis=new int[100000]; int n=10000; vis[0]=1; vis[1]=1; for(int i=2;i<=n;i++){ if(vis[i]==0){ vis[i]=1; prime[++prime[0]]=i; } for(int j=1;j<=prime[0]&&i*prime[j]<=n;j++){ vis[i*prime[j]]=1; if(i%prime[j]==0) break; } } while(reader.hasNext()){ int x=reader.nextInt(); System.out.printf("%d\n",prime[x]); } }} import java.util.Scanner;public class Main { public static void main(String[] args) { Scanner reader=new Scanner(System.in); long n; long []input=new long[50]; int m=0; n=reader.nextLong(); while(n!=0){ input[m++]=n%10; n/=10; } StringBuffer str=new StringBuffer(); int flag=0; for(int i=m-1;i>=0;i--){ if(m>=9&&input[8]!=0) flag=1; if(input[i]==0) { if((i+1)==5) str.append("wan "); if((i>=1&&input[i-1]!=0)) { str.append("ling ");} } if(input[i]==1&&(i+1)!=10&&(i+1!=2||m>2)&&m!=6) str.append("yi "); if(input[i]==2) str.append("er "); if(input[i]==3) str.append("san "); if(input[i]==4) str.append("si "); if(input[i]==5) str.append("wu "); if(input[i]==6) str.append("liu "); if(input[i]==7) str.append("qi "); if(input[i]==8) str.append("ba "); if(input[i]==9) str.append("jiu "); if((i+1)==2&&input[i]!=0) str.append("shi "); if((i+1)==3&&input[i]!=0) str.append("bai "); if((i+1)==4&&input[i]!=0) str.append("qian "); if((i+1)==5&&input[i]!=0) str.append("wan "); if((i+1)==6&&input[i]!=0) str.append("shi "); if((i+1)==7&&input[i]!=0) str.append("bai "); if((i+1)==8&&input[i]!=0) str.append("qian "); if((i+1)==9&&input[i]!=0) str.append("yi "); if((i+1)==10&&input[i]!=0&&flag!=1) str.append("shi yi"); if((i+1)==10&&input[i]!=0&&flag==1) str.append("shi "); } String str1=str.toString().trim(); System.out.println(str1); }} import java.util.Scanner;public class Main { public static void main(String[] args) { String m=""; for(int i=1;i<=500;i++) { m=m+String.valueOf(i); } Scanner reader=new Scanner(System.in); System.out.println(m.indexOf(reader.nextLine())+1); }} import java.util.Scanner;public class Main { public static void main(String[] args) { Scanner reader=new Scanner(System.in); double m=reader.nextInt(); double n=reader.nextInt(); double x=Math.pow(Math.E,Math.log(n/m)/20)-1; System.out.printf("%.4f",x); }} public BigDecimal(BigInteger unscaledVal, int scale)将未BigInteger缩放的值和int比例转换为BigDecimal.价值BigDecimal是unscaledVal/10^scale. 参数: unscaledVal- 未缩放的价值BigDecimal. scale- 规模BigDecimal.
import java.math.BigDecimal;import java.math.BigInteger;import java.math.RoundingMode;public class Main { public static void main(String[] args) { BigInteger a=BigInteger.ONE; BigInteger b=BigInteger.ONE; for(int i=3;i<=500;i++){ BigInteger t=b; b=a.add(b); a=t; } BigDecimal divide=new BigDecimal(a,100).divide(new BigDecimal(b,100),RoundingMode.HALF_DOWN); System.out.printf("%.80f",divide); }} import java.util.Scanner;public class Main { public static void main(String[] args) { Scanner reader =new Scanner(System.in); int n=reader.nextInt(); calculate c=new calculate(); int flag=-1; int fz=1,fm=1; int z=1,m; for(int i=1,j=1;i<=n&&j<=n;i++,j++) { if(i==1&&j==1) continue; if(i>=2) z=i-1; m=j; if(fm!=c.lcm(fm, m)) fz=fz*c.lcm(fm, m)/fm; if(m!=c.lcm(fm, m)) z=z*c.lcm(fm, m)/m; fz=fz+z*flag; fm=c.lcm(fm, m); m=c.lcm(fm, m); flag=-flag; } System.out.printf("%d/%d",fz,fm); }}class calculate{ int gcd(int a,int b) { if(b==0) { return a; } return gcd(b,a%b); } int lcm(int a,int b) { return a*b/gcd(a,b); }} import java.util.Scanner;public class Main { public static void main(String[] args) { Scanner reader=new Scanner(System.in); while(reader.hasNext()) { int year=2014,month=11,day=9; int y_month[]= { 0,31,28,31,30,31,30,31,31,30,31,30,31}; int n=reader.nextInt(); for(int i=1;i<=n;i++) { day++; if((year%4==0&&year%100!=0)||(year%400==0)) { y_month[2]=29; } else { y_month[2]=28; } if(day>y_month[month]) { day=1; month++; } if(month>12) { month=1; year++; } } System.out.println(String.format("%d-%2d-%2d",year,month,day).replace(" ", "0"));}}} import java.text.SimpleDateFormat;import java.util.Calendar;import java.util.Date;import java.util.Scanner;public class Main { public static void main(String[] args) { Scanner reader=new Scanner(System.in); while(reader.hasNext()) { int n=reader.nextInt(); Calendar calendar = Calendar.getInstance(); calendar.set(2014,10,9); //设置日期 其中月份在日期中保存为 0-11代表1月-12月 calendar.add(calendar.DATE,n); //由当前日期向后查询 多少天 Date date = calendar.getTime(); //将日期类转化为date类型 SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); //设置格式化输出的样式 yyyy-MM-dd HH:mm:ss yyyy年MM月dd日 HH时mm分ss秒 ymdhms分别都是代表首字符，一般用M代表月，m代表分 System.out.println(sdf.format(date)); } }} 2个不同的整数a、b，被一个整数m相除时，得到相同的余数，那么我就可以称a、b同余。 因为a、b同余所以当他们相减时，余数就抵消掉了，剩下的那部分就是能被m整除的。
import java.util.Scanner;public class Main { public static void main(String[] args) { Scanner scan = new Scanner(System.in); int n = scan.nextInt(); while(n-->0){ long m = scan.nextLong(); System.out.println((471+1000*(m-1))); } }} import java.util.Scanner;public class Main { public static void main(String[] args) { int n; long count=0; long sum=1; Scanner reader=new Scanner(System.in); n=reader.nextInt(); for(int i=1;i<=n;i++){ count=0; for(int j=0;j<=9;j++){ if(i==1&&j==0||j==4) continue; count++; } sum*=count; //System.out.println(count); } System.out.println(sum);}} 转载地址：http://sbjki.baihongyu.com/