P5708题目链接
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
double a = scanner.nextDouble(), b = scanner.nextDouble(), c = scanner.nextDouble(), p = (a+b+c)/2;
System.out.printf("%.1f", Math.sqrt(p*(p-a)*(p-b)*(p-c)));
scanner.close();
}
}
P5714题目链接
import java.util.Scanner;
public class Main {
/**
* 有效数字
*/
private static double roundToSignificantFigures(double num, int n) {
if(num == 0) {
return 0;
}
double d = Math.ceil(Math.log10(Math.abs(num)));
int power = n - (int) d;
double magnitude = Math.pow(10, power);
long shifted = Math.round(num*magnitude);
return shifted/magnitude;
}
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
double result = roundToSignificantFigures(scanner.nextDouble()/Math.pow(scanner.nextDouble(), 2), 6);
scanner.close();
if (result < 18.5) {
System.out.println("Underweight");
} else if (result < 24) {
System.out.println("Normal");
} else {
System.out.println(result + "\nOverweight");
}
}
}
P5720题目链接
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
int length = scanner.nextInt();
scanner.close();
int counter = 1;
while (length > 1) {
length/=2;
counter++;
}
System.out.println(counter);
}
}
P5725题目链接
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
String var1 = "01\n\n01";
String var2 = "0102\n0304\n\n 01\n0203";
String var3 = "010203\n040506\n070809\n\n 01\n 0203\n040506";
String var4 = "01020304\n05060708\n09101112\n13141516\n\n 01\n 0203\n 040506\n07080910";
String var5 = "0102030405\n0607080910\n1112131415\n1617181920\n2122232425\n\n";
String var6 = " 01\n 0203\n 040506\n 07080910\n1112131415";
String var7 = "010203040506\n070809101112\n131415161718\n192021222324\n252627282930\n313233343536\n\n";
String var8 = " 01\n 0203\n 040506\n 07080910\n 1112131415\n161718192021";
String var9 = "01020304050607\n08091011121314\n15161718192021\n22232425262728\n29303132333435\n";
String var10 = "36373839404142\n43444546474849\n\n";
String var11 = " 01\n 0203\n 040506\n 07080910\n 1112131415\n";
String var12 = " 161718192021\n22232425262728";
String var13 = "0102030405060708\n0910111213141516\n1718192021222324\n2526272829303132\n";
String var14 = "3334353637383940\n4142434445464748\n4950515253545556\n5758596061626364\n\n";
String var15 = " 01\n 0203\n 040506\n 07080910\n 1112131415\n";
String var16 = " 161718192021\n 22232425262728\n2930313233343536";
String var17 = "010203040506070809\n101112131415161718\n192021222324252627\n282930313233343536\n";
String var18 = "373839404142434445\n464748495051525354\n555657585960616263\n646566676869707172\n";
String var19 = "737475767778798081\n\n";
String var20 = " 01\n 0203\n 040506\n 07080910\n 1112";
String var21 = "131415\n 161718192021\n 22232425262728\n 2930313233343536\n373839404142434445";
Scanner scanner = new Scanner(System.in);
int num = scanner.nextInt();
scanner.close();
switch (num) {
case 1:
System.out.println(var1);
break;
case 2:
System.out.println(var2);
break;
case 3:
System.out.println(var3);
break;
case 4:
System.out.println(var4);
break;
case 5:
System.out.println(var5+var6);
break;
case 6:
System.out.println(var7+var8);
break;
case 7:
System.out.println(var9+var10+var11+var12);
break;
case 8:
System.out.println(var13+var14+var15+var16);
break;
default:
System.out.println(var17+var18+var19+var20+var21);
break;
}
}
}
P5726题目链接
import java.util.Arrays;
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
int num = scanner.nextInt();
int[] grades = new int[num];
for (int i = 0; i < num; i++) {
grades[i] = scanner.nextInt();
}
scanner.close();
Arrays.sort(grades);
int sum = 0;
for (int i = 1; i < num-1; i++) {
sum += grades[i];
}
System.out.printf("%.2f", ((double)sum/(num-2)));
}
}
P5732题目链接
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
int num = scanner.nextInt();
scanner.close();
int[][] array = new int[num][num];
for (int i = 0; i < num; i++) {
for (int j = 0; j <= i; j++) {
array[i][j] = 1;
}
}
for (int i = 1; i < num; i++) {
for (int j = 0; j < i; j++) {
if (j == 0) {
array[i][j] = array[i-1][j];
} else {
array[i][j] = array[i-1][j] + array[i-1][j-1];
}
}
}
for (int i = 0; i < num; i++) {
StringBuilder builder = new StringBuilder();
for (int j = 0; j <= i; j++) {
builder.append(array[i][j]).append(' ');
}
System.out.println(builder.toString().trim());
}
}
}
P5738题目链接
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
int n = scanner.nextInt(), m = scanner.nextInt();
double max_sum = 0.0;
for (int i = 0; i < n; i++) {
int sum_temp = scanner.nextInt(), max_temp = sum_temp, min_temp = sum_temp;
for (int j = 1; j < m; j++) {
int temp = scanner.nextInt();
if (temp > max_temp) {
max_temp = temp;
} else if (temp < min_temp) {
min_temp = temp;
}
sum_temp += temp;
}
sum_temp -= max_temp;
sum_temp -= min_temp;
max_sum = Math.max(max_sum, (double)sum_temp/(m-2));
}
scanner.close();
System.out.printf("%.2f", max_sum);
}
}