#include<bits/stdc++.h>
using namespace std;
typedef unsigned long long int ull;
typedef long long int ll;
typedef pair<ll,ll> pll;
typedef long double D;
//typedef complex<D> P;
#define F first
#define S second
const ll MOD=1000000007;
//const ll MOD=998244353;

template<typename T,typename U>istream & operator >> (istream &i,pair<T,U> &A){i>>A.F>>A.S; return i;}
template<typename T>istream & operator >> (istream &i,vector<T> &A){for(auto &I:A){i>>I;} return i;}
template<typename T,typename U>ostream & operator << (ostream &o,const pair<T,U> &A){o<<A.F<<" "<<A.S; return o;}
template<typename T>ostream & operator << (ostream &o,const vector<T> &A){int i=A.size(); for(auto &I:A){o<<I<<(--i?" ":"");} return o;}

ll solve(ll A,ll B,ll C){
  ll ret=0;
  if(A>C){swap(A,C);}
  if(A==C){A--; ret++;}
  if(B==C){C--; ret++; if(A==C){A--; ret++;}}
  else if(A<B && B<C){
    if(A==1 || B-A+1>C-B+1+(A==B-1?1:0)){
      ret+=C-B+1;
      C=B-1;
      if(A==C){A--; ret++;}
    }
    else{ret+=B-A+1; B=A-1;}
  }
  else if(A==B){B--; ret++;}
  if(A<1 || B<1 || C<1){ret=-1;}
  return ret;
}

int main(){
  cin.tie(0);
  ios::sync_with_stdio(false);
  ll T;
  cin>>T;
  for(int i=0;i<T;i++){
    ll a,b,c;
    cin>>a>>b>>c;
    cout<<solve(a,b,c)<<endl;
  }

  return 0;
}