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- #include<stdio.h>
- int main()
- {
- int t,i,min,max,n;
- scanf("%d", &t);
- while(t--)
- {
- scanf("%d", &n);
- int a[n];
- for(i=0;i<n;i++)
- scanf("%d", &a[i]);
- min=a[0];
- for(i=1;i<n;i++)
- if(a[i]<min)
- min=a[i];
- max=a[0];
- for(i=1;i<n;i++)
- if(a[i]>max)
- max=a[i];
- printf("%d\n", (max-min)*2);
- }
- return 0;
- }
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