#include <iostream>
#include <vector>

using namespace std;

void segmenti(const vector<int> &a, const int s)
{
    const int n = a.size();

    int l = 0;
    int sum = 0;
    for (int r = 0; r < n; r++) {
        sum += a[r];
        while (sum > s) {
            sum -= a[l];
            l++;
        }

        if (sum == s) {
            cout << l << " " << r << endl;
            sum -= a[l];
            l++;
        }
    }
}

int main(void)
{
    int s, n;
    cin >> s >> n;

    vector<int> a(n);
    for (int i = 0; i < n; i++) {
        cin >> a[i];
    }

    segmenti(a, s);

    return 0;
}