简单的A+B，Java版

A.java

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+import java.util.Scanner;
+ 
+public class Main {
+    public static void main(String[] args) {
+        Scanner cin = new Scanner(System.in);
+        int sum = 0;
+        while (cin.hasNext()) {
+            String x = cin.next();
+            String s[] = x.split("\\D+");
+            if (s.length != 3) {
+                continue;
+            } else {
+                long a = Long.parseLong(s[0]);
+                long b = Long.parseLong(s[1]);
+                long c = Long.parseLong(s[2]);
+                if (x.indexOf("+") > 0) {
+                    if (a + b == c) {
+                        sum++;
+                    }
+                } else {
+                    if (Math.abs(a - b) == c) {
+                        sum++;
+                    }
+                }
+            }
+        }
+        System.out.println("RIGHT:" + sum);
+    }
+}