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https://github.com/Kiritow/OJ-Problems-Source.git
synced 2024-03-22 13:11:29 +08:00
21 lines
395 B
C++
21 lines
395 B
C++
#include<stdio.h>
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#include<cstring>
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#include<algorithm>
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#define I(x) scanf("%d",&x)
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using namespace std;
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int main(){
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int n,a,sum,t,b,ca=0;
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I(t);
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while(t--){
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I(n);
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sum=0;
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for(int i=0;i<n;i++){
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I(a);
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sum+=a;
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if(i==0) b=a;
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}
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printf("Case %d: %.6lf\n",++ca,1.0*b/sum);
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}
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return 0;
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}
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