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HW7-Chatbot.java
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HW7-Chatbot.java
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import java.util.*;
import java.io.*;
public class Chatbot{
private static String filename = "./corpus.txt";
private static ArrayList<Integer> readCorpus(){
ArrayList<Integer> corpus = new ArrayList<Integer>();
try{
File f = new File(filename);
Scanner sc = new Scanner(f);
while(sc.hasNext()){
if(sc.hasNextInt()){
int i = sc.nextInt();
corpus.add(i);
}
else{
sc.next();
}
}
}
catch(FileNotFoundException ex){
System.out.println("File Not Found.");
}
return corpus;
}
private static ArrayList<Integer> corpus = readCorpus();
private static int v = Collections.max(corpus)+1;
private static int trigram(double r, int h1, int h2){
double sum = 0.0;
int w, count, count_w, i;
for(w = 0; w < v; w++) {
count = 0;
count_w = 0;
for(i=0; i<corpus.size()-2; i++){
if (corpus.get(i) == h1 && corpus.get(i+1) == h2 && corpus.get(i+2) == w){
count_w++;
count++;
}
else if (corpus.get(i) == h1 && corpus.get(i+1) == h2){
count++;
}
}
sum += (double)(count_w + 1) / (count + v);
if (sum >= r) break;
}
return w;
}
private static int bigram(double r, int h1){
double sum = 0.0;
int w, count, count_w, i;
for(w = 0; w < v; w++) {
count = 0;
count_w = 0;
for(i=0; i<corpus.size()-1; i++){
if (corpus.get(i) == h1 && corpus.get(i+1) == w){
count_w++;
}
if (corpus.get(i) == h1){
count++;
}
}
sum += (double)(count_w + 1) / (count + v);
if (sum > r) break;
}
return w;
}
private static int unigram(double r){
double sum = 0.0;
int w, count, i;
for(w = 0; w < v; w++) {
count = 0;
for (i = 0; i < corpus.size(); i++) {
if (corpus.get(i) == w){
count++;
}
}
sum += (double)(count + 1) / (corpus.size() + v);
if (sum > r) break;
}
return w;
}
static public void main(String[] args){
int flag = Integer.valueOf(args[0]);
if(flag == 100){
int w = Integer.valueOf(args[1]);
int count;
count = Collections.frequency(corpus, w);
System.out.println(count);
System.out.printf("%.7f", (float)(count+1)/(corpus.size()+v));
}
else if(flag == 200){
int n1 = Integer.valueOf(args[1]);
int n2 = Integer.valueOf(args[2]);
double sum = 0;
int i;
int count;
//TODO generate
double r = (float) n1 / n2;
for (i = 0; i<v; i++){
count = Collections.frequency(corpus, i);
double current_P = (double)(count+1)/(corpus.size()+v);
sum += current_P;
if(sum >= r){
System.out.println(i);
System.out.printf("%.7f\n", sum - current_P);
System.out.printf("%.7f\n", sum);
break;
}
}
}
else if(flag == 300){
int h = Integer.valueOf(args[1]);
int w = Integer.valueOf(args[2]);
int count_h = 0;
int count_hw = 0;
boolean check = false;
//TODO
for(int temp : corpus){
if(temp == w && check){
count_hw++;
if(h != w) check = false;
else count_h++;
}
else if(temp == h){
count_h++;
check = true;
}
else check = false;
}
if(corpus.get(corpus.size()-1) == h) count_h--;
System.out.println(count_hw);
System.out.println(count_h);
System.out.printf("%.7f\n", (float)(count_hw+1)/(count_h+v));
}
else if(flag == 400){
int n1 = Integer.valueOf(args[1]);
int n2 = Integer.valueOf(args[2]);
int h = Integer.valueOf(args[3]);
int i;
double sum = 0;
int count_h;
int count_hw;
boolean check = false;
for (i = 0; i<v; i++) {
count_h = 0;
count_hw = 0;
for (int temp : corpus) {
if (temp == i && check) {
count_hw++;
if (i != h) check = false;
else count_h++;
}
else if (temp == h) {
count_h++;
check = true;
}
else check = false;
}
if(corpus.get(corpus.size()-1) == h) count_h--;
double current_P = (double)(count_hw+1)/(count_h+v);
sum += current_P;
if(sum >= (double)n1/n2){
System.out.println(i);
System.out.printf("%.7f\n", sum - current_P);
System.out.printf("%.7f\n", sum);
break;
}
}
}
else if(flag == 500){
int h1 = Integer.valueOf(args[1]);
int h2 = Integer.valueOf(args[2]);
int w = Integer.valueOf(args[3]);
int i;
int count_h2w = 0;
int count_h2 = 0;
for(i=0; i<corpus.size()-2; i++){
if (corpus.get(i) == h1 && corpus.get(i+1) == h2 && corpus.get(i+2) == w){
count_h2w++;
}
if (corpus.get(i) == h1 && corpus.get(i+1) == h2){
count_h2++;
}
}
System.out.println(count_h2w);
System.out.println(count_h2);
System.out.printf("%.7f\n", (float)(count_h2w+1)/(count_h2+v));
}
else if(flag == 600){
int n1 = Integer.valueOf(args[1]);
int n2 = Integer.valueOf(args[2]);
int h1 = Integer.valueOf(args[3]);
int h2 = Integer.valueOf(args[4]);
int i, j, count_h2, count_h2w;
double sum = 0;
for (i = 0; i < v; i++) {
count_h2 = 0;
count_h2w = 0;
for(j=0; j<corpus.size()-2; j++){
if (corpus.get(j) == h1 && corpus.get(j+1) == h2 && corpus.get(j+2) == i){
count_h2w++;
count_h2++;
}
else if (corpus.get(j) == h1 && corpus.get(j+1) == h2){
count_h2++;
}
}
double current_P = (double)(count_h2w+1)/(count_h2+v);
sum += current_P;
if(sum >= (double)n1/n2){
System.out.println(i);
System.out.printf("%.7f\n", sum - current_P);
System.out.printf("%.7f\n", sum);
break;
}
}
}
else if(flag == 700){
int seed = Integer.valueOf(args[1]);
int t = Integer.valueOf(args[2]);
int h1, h2, w;
double r;
Random rng = new Random();
if (seed != -1) rng.setSeed(seed);
if(t == 0){
r = rng.nextDouble();
// unigram model
w = unigram(r);
h1 = w;
System.out.println(h1);
if(h1 == 9 || h1 == 10 || h1 == 12) return;
// bigram model
r = rng.nextDouble();
w = bigram(r, h1);
h2 = h1;
h1 = w;
System.out.println(h1);
// trigram model
while(h1 != 9 && h1 != 10 && h1 != 12) {
r = rng.nextDouble();
w = trigram(r, h1, h2);
h2 = h1;
h1 = w;
System.out.println(h1);
}
}
else if(t == 1){
h1 = Integer.valueOf(args[3]);
// bigram model
r = rng.nextDouble();
w = bigram(r, h1);
h2 = h1;
h1 = w;
System.out.println(h1);
// trigram model
while(h1 != 9 && h1 != 10 && h1 != 12) {
r = rng.nextDouble();
w = trigram(r, h1, h2);
h2 = h1;
h1 = w;
System.out.println(h1);
}
}
else if(t == 2){
h1 = Integer.valueOf(args[3]);
h2 = Integer.valueOf(args[4]);
// trigram model
while(h1 != 9 && h1 != 10 && h1 != 12) {
r = rng.nextDouble();
w = trigram(r, h1, h2);
h2 = h1;
h1 = w;
System.out.println(h1);
}
}
}
}
}