Create AGC_034_B.cpp

#19

Author: zeikar

AGC_034_B.cpp

@@ -0,0 +1,33 @@
+#include <iostream>
+#include <string>
+using namespace std;
+
+int main() {
+	string s;
+	cin >> s;
+
+	// dummy
+	s += "F";
+
+	long long ans = 0;
+	long long aCount = 0;
+
+	for (int i = 0; i < s.length(); i++)
+	{
+		if (s[i] == 'A')
+		{
+			aCount++;
+		}
+		else if (s.substr(i, 2) == "BC")
+		{
+			ans += aCount;
+			i++;
+		}
+		else
+		{
+			aCount = 0;
+		}
+	}
+
+	cout << ans << endl;
+}