#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <deque>
#include <stack>
#include <queue>
#include <cmath>
#include <set>
#include <map>
#include <unordered_set>
#include <unordered_map>
using namespace std;
int main()
{
int n, t, c;//罪犯数量 罪行值之和 入狱时间连续
while (cin >> n >> t >> c) {
vector<int> num(n);
for (int i = 0; i < n; i++) {
cin >> num[i];
}
int count = 0;
for (int i = 0; i < n - c + 1; i++) {
int sum = 0;
for (int j = i; j < i + c; j++) {
sum = sum + num[j];
}
if (sum <= t) {
count++;
}
}
cout << count << endl;
}
}