#include <bits/stdc++.h>
using namespace std;
int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int N, S, T, weight, bestDays = 0;
    cin >> N >> S >> T >> weight;
    bestDays += (weight >= S && weight <= T);
    for (int i = 1, change; i < N; ++i) {
        cin >> change; 
        weight += change; 
        bestDays += (weight >= S && weight <= T); 
    }
    cout << bestDays << endl; 
    return 0;
}

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