题解

#include <bits/stdc++.h>
long long abs(long long x){
    if(x<0) return -x;
    else return x;
}
long long read(){
    long long sum=0,f=1;
    char ch=getchar();
    while(!(ch>='0' and ch<='9')){
        if(ch=='-') f=-1;
        ch=getchar();
    }
    while(ch>='0' and ch<='9'){
        sum=(sum<<3)+(sum<<1)+(ch^48);
        ch=getchar();
    }
    return sum*f;
}
int _read(){
    int sum=0,f=1;
    char ch=getchar();
    while(!(ch>='0' and ch<='9')){
        if(ch=='-') f=-1;
        ch=getchar();
    }
    while(ch>='0' and ch<='9'){
        sum=(sum<<3)+(sum<<1)+(ch^48);
        ch=getchar();
    }
    return sum*f;
}
void write(long long x){
    if(x>9) write(x/10);
    putchar(x%10+'0');
}
int t;
long long a[4],ans;
signed main(void)
{
	t=_read();
	while(t--)
	{
		a[1]=read();
        a[2]=read();
        a[3]=read();
		ans=abs(a[1]-a[2])+abs(a[1]-a[3])+abs(a[2]-a[3])-4;
		if(ans<=0) putchar('0');
		else write(ans);
        putchar('\n');
	}
}