#include "bits/stdc++.h"

#define ll long long int
#define vll vector<ll>
#define vi vector<int>
#define pll pair<long long, long long>
#define pii pair<int, int>
#define vpll vector < pair<long long,long long> >
#define all(c) c.begin(),c.end()
#define pb push_back
#define nl cout << '\n'
#define ff first
#define ss second
#define mod 1000000007
#define inf 1000000000000000001

#define rep(i, n)      for(ll i = 0; i <  n; ++i)
#define repA(i, a, n)  for(ll i = a; i <= n; ++i)
#define repD(i, a, n)  for(ll i = a; i >= n; --i)

using namespace std;

void solve(){
    int x, y, z;
    cin >> x >> y >> z;
    cout << (z-y)/x << '\n';
}

int main(){
    ios::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);

    int t = 1, tmp = 0;
    cin >> t;
    while(t--){
        // cout << "Case #" << ++tmp << ": ";
        solve();
        // if(t) cout << "\n";
    }
    cerr << "Time : " << (double)clock() / (double)CLOCKS_PER_SEC << "s\n";
    return 0;
}