# POJ 刷题系列：3299. Humidex

## POJ 刷题系列：3299. Humidex

humidex = temperature + h h = (0.5555)× (e - 10.0) e = 6.11 × exp [5417.7530 × ((1/273.16) - (1/(dewpoint+273.16)))]

```import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.Map;
import java.util.StringTokenizer;

public class Main{

String INPUT = "./data/judge/201712/P3299.txt";

public static void main(String[] args) throws IOException {
new Main().run();
}

double calH(double T, double D) {
double e = 6.11 * Math.pow(Math.E, 5417.7530 * ((1 / 273.16) - (1 / (D + 273.16))));
double h = 0.5555 * (e - 10.0);
return T + h;
}

double calT(double D, double H) {
double e = 6.11 * Math.pow(Math.E, 5417.7530 * ((1 / 273.16) - (1 / (D + 273.16))));
double h = 0.5555 * (e - 10.0);
return H - h;
}

double calD(double T, double H) {
double h = H - T;
double e = h / 0.5555 + 10.0;
double x = Math.log(e / 6.11);
double d = 1 / 273.16 - x / 5417.25;
return 1 / d - 273.16;
}

while (true) {
String line = ns();

if (line.equals("E")) break;
double T = 500;
double D = 500;
double H = 500;

if (line.equals("T")) T = nd();
else if (line.equals("D")) D= nd();
else H = nd();

line = ns();

if (line.equals("T")) T = nd();
else if (line.equals("D")) D = nd();
else H = nd();

if (T == 500) {
out.printf("T %.1f D %.1f H %.1f\n", calT(D, H), D, H);
}
else if (D == 500) {
out.printf("T %.1f D %.1f H %.1f\n", T, calD(T, H), H);
}
else {
out.printf("T %.1f D %.1f H %.1f\n", T, D, calH(T, D));
}
}
}

FastScanner in;
PrintWriter out;

void run() throws IOException {
boolean oj;
try {
oj = ! System.getProperty("user.dir").equals("F:\\oxygen_workspace\\Algorithm");
} catch (Exception e) {
oj = System.getProperty("ONLINE_JUDGE") != null;
}

InputStream is = oj ? System.in : new FileInputStream(new File(INPUT));
in = new FastScanner(is);
out = new PrintWriter(System.out);
long s = System.currentTimeMillis();
out.flush();
if (!oj){
System.out.println("[" + (System.currentTimeMillis() - s) + "ms]");
}
}

public boolean more(){
return in.hasNext();
}

public int ni(){
return in.nextInt();
}

public long nl(){
return in.nextLong();
}

public double nd(){
return in.nextDouble();
}

public String ns(){
return in.nextString();
}

public char nc(){
return in.nextChar();
}

class FastScanner {
StringTokenizer st;
boolean hasNext;

public FastScanner(InputStream is) throws IOException {
hasNext = true;
}

public String nextToken() {
while (st == null || !st.hasMoreTokens()) {
try {
} catch (Exception e) {
hasNext = false;
return "##";
}
}
return st.nextToken();
}

String next = null;
public boolean hasNext(){
next = nextToken();
return hasNext;
}

public int nextInt() {
if (next == null){
hasNext();
}
String more = next;
next = null;
return Integer.parseInt(more);
}

public long nextLong() {
if (next == null){
hasNext();
}
String more = next;
next = null;
return Long.parseLong(more);
}

public double nextDouble() {
if (next == null){
hasNext();
}
String more = next;
next = null;
return Double.parseDouble(more);
}

public String nextString(){
if (next == null){
hasNext();
}
String more = next;
next = null;
return more;
}

public char nextChar(){
if (next == null){
hasNext();
}
String more = next;
next = null;
return more.charAt(0);
}
}

static class D{

public static void pp(int[][] board, int row, int col) {
StringBuilder sb = new StringBuilder();
for (int i = 0; i < row; ++i) {
for (int j = 0; j < col; ++j) {
sb.append(board[i][j] + (j + 1 == col ? "\n" : " "));
}
}
System.out.println(sb.toString());
}

public static void pp(char[][] board, int row, int col) {
StringBuilder sb = new StringBuilder();
for (int i = 0; i < row; ++i) {
for (int j = 0; j < col; ++j) {
sb.append(board[i][j] + (j + 1 == col ? "\n" : " "));
}
}
System.out.println(sb.toString());
}
}

static class ArrayUtils {

public static void fill(int[][] f, int value) {
for (int i = 0; i < f.length; ++i) {
Arrays.fill(f[i], value);
}
}

public static void fill(int[][][] f, int value) {
for (int i = 0; i < f.length; ++i) {
fill(f[i], value);
}
}

public static void fill(int[][][][] f, int value) {
for (int i = 0; i < f.length; ++i) {
fill(f[i], value);
}
}
}

static class Num{
public static <K> void inc(Map<K, Integer> mem, K k) {
if (!mem.containsKey(k)) mem.put(k, 0);
mem.put(k, mem.get(k) + 1);
}
}
}```

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