Untitled

#include <iostream>

using namespace std;

int main(void){
    int t;
    cin >> t;
    for (int i = 0; i < t; i++)
    {
        int count = 0;
        int n, k;
        cin >> n >> k;
        for (int j = 0; j < n; j++)
        {
            int x, y;
        cin >> x >> y;
        count += (k - 1) / x;
        }
        cout<< "Case " << (i + 1) <<": " << count;
    }
    return 0;
}