Score, ACM/ICPC Seoul 2005, UVa1585

#include <iostream>
#include <string>
using namespace std;
int main()
{
	int t;
	cin >> t;
	while (t-- > 0)
	{
		string s;
		cin >> s;
		int sum = 0, consecutive = 0;
		int len = s.length();
		for (int i = 0; i < len; ++i)
		{
			if (s[i] == 'X')
			{
				consecutive = 0;
			}
			else if (s[i] == 'O')
			{
				++consecutive;
				sum += consecutive;
			}
		}
		cout << sum << endl;
	}
}