import java.util.*;
import java.io.*;

public class Main {
    
    public static Scanner sc = new Scanner(System.in);
    public static PrintWriter pw = new PrintWriter(System.out);
    
    public static void main(String[] args) {
        
        int t = sc.nextInt();
        while( t > 0 ) {
            solve();
            t--;
        }
        
        pw.flush();
        
    }
    
    static void solve() {
        
        int N = sc.nextInt();
        int M = sc.nextInt();
        int K = sc.nextInt();
        pw.println( K%M < M-N ? K%M : 0 );
        
    }
    
}