upd

java/entrance-exams/coding/Main.java

@@ -0,0 +1,41 @@
+import java.util.Arrays;
+import java.util.Scanner;
+
+public class Main  {
+    public static void main(String[] args) {
+        task2();
+    }
+
+    static void task1() {
+        Scanner input = new Scanner(System.in);
+        String data = input.nextLine();
+
+        int day1 = Integer.parseInt(data.split(" ")[0]);
+        int day2 = Integer.parseInt(data.split(" ")[1]);
+
+        if (day1 > 7) {
+            System.out.println(day1 - 7);
+        } else {
+            System.out.println(day2 + 7);
+        }
+    }
+
+    static void task2() {
+        Scanner input = new Scanner(System.in);
+        String data = input.nextLine();
+
+        int cntA = 0, cntAB = 0, cntABC = 0;
+
+        for (char c : data.toCharArray()) {
+            if (c == 'a') {
+                cntA++;
+            } else if (c == 'b') {
+                cntAB += cntA;
+            } else if (c == 'c') {
+                cntABC += cntAB;
+            }
+        }
+
+        System.out.println(cntABC);
+    }
+}