#include<iostream>
#include"math.h"
using namespace std;
 
int main()
{
    float k=0;
    long long a=0, b=0, ans=0;
    int t=0;
    cin >> t;
    while(t--)
    {
        long long t1=0, t2=0;
 
        cin >> k >> t1 >> t2; // Taking input in temprory variables.
        float temp = k/2; //To know weather its even or odd.
 
        a = max(t1, t2);//a will store max one
        b = min(t1, t2);//b will store min one
 
        //if (a-b > k/2)
        if(a-b > temp)
        {
            ans = (k-a)+b-1;
        }
 
        //if (a-b < k/2)
        else if(a-b < temp)
        {
            ans = (a-b)-1;
        }
 
        //otherwise a:b is forming a diameter
        else
        {
            ans = 0;
        }
 
        cout << ans << endl;
    }
} 

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NAozIDMgMQo2IDEgMwo2IDEgNAoxMCAxIDU=

4
3 3 1
6 1 3
6 1 4
10 1 5