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- #include<stdio.h>
- void fn(int n)
- {
- if (n==1)
- {
- int s,i,a=0;
- float b=0.0;
- scanf("%d",&s);
- int arr[s];
- for(i=0; i<s; i++)
- {
- scanf("%d",&arr[i]);
- a+=arr[i];
- }
- b=(float)a/(float)s;
- printf("%.1f\n",b);
- }
- else if(n==2)
- {
- int s,i,a,b,big=-5,biggi=0,sm=500000,smi=0,c,d;
- scanf("%d",&s);
- int arr[s];
- for(i=0; i<s; i++)
- {
- scanf("%d",&arr[i]);
- }
- for(i=0; i<s; i++)
- {
- if(arr[i]<sm)
- {
- sm=arr[i];
- smi=i;
- }
- }
- for(i=0; i<s; i++)
- {
- if(big<arr[i])
- {
- big=arr[i];
- biggi=i;
- }
- }
- for(i=0; i<s; i++)
- {
- arr[biggi]=sm;
- printf("%d ",arr[i]);
- }
- }
- else if(n==3)
- {
- int s,i;
- scanf("%d",&s);
- int arr[s];
- for(i=0; i<s; i++)
- {
- scanf("%d",&arr[i]);
- if(i==arr[i])
- {
- printf("%d\n",i);
- }
- }
- }
- }
- int main()
- {
- int n,i;
- for(i=1;; i++)
- {
- scanf("%d",&n);
- if(i>3||i<=0)
- break;
- else
- fn(n);
- }
- }
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