#include <iostream>

using namespace std;

const int N = 3e4 + 10;
int a[N], b[N];

int main() {
    int k, m, n;
    cin >> k >> m >> n;
    
    bool f = false;
    for (int i = 1; i <= m; i++) {
        cin >> a[i] >> b[i];
        
        if (a[i] != 0) {
            int c = k / a[i];
            int s = c * b[i];
            if (s >= n) {
                f = true;
                cout << i << ' ';
            }
        } else {
            f = true;
            cout << i << ' ';
        }
    }
    
    if (!f) cout << -1 << endl;
    
    return 0;
}

uu们，用例2里真的有a[i]是0的数据吗，我咋没看到