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variablearithmetic.java
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variablearithmetic.java
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import java.io.*;
import java.util.*;
public class variablearithmetic {
public static void main(String[] args) throws Exception {
BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
// PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter("System.out")));
PrintWriter out = new PrintWriter(new BufferedWriter(new OutputStreamWriter(System.out)));
HashMap<String, Integer> variables = new HashMap<String, Integer>();
ArrayList<String> unknown = new ArrayList<String>();
boolean first = true;
while(true) {
String[] input = in.readLine().split(" ");
if(input[0].equals("0")) break;
if(input.length > 1 && input[1].equals("=")) {
String var = input[0];
int val = isNum(input[2]) ? Integer.parseInt(input[2]) : variables.get(input[2]);
variables.put(var, val);
}
else {
if(!first) out.println();
first = false;
int sum = 0;
for(int i = 0; i < input.length; i += 2) {
if(isNum(input[i])) sum += Integer.parseInt(input[i]);
else if(variables.get(input[i]) != null) sum += variables.get(input[i]);
else unknown.add(input[i]);
}
int temp = 1;
if(sum != 0) out.print(sum);
if(sum != 0 && unknown.size() > 0) out.print(" + ");
for(String s : unknown) {
if(temp != unknown.size()) out.print(s + " + ");
else out.print(s);
temp++;
}
unknown.clear();
}
}
out.close();
}
public static boolean isNum(String s) {
return s.matches("\\d+");
}
}