25 lines
489 B
C++
25 lines
489 B
C++
#include <cstdio>
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#include <algorithm>
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#include <cstring>
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using namespace std;
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int N,T;
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double sum,k;
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int c;
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int main(void)
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{
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int cas = 1;
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scanf("%d", &T);
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while(T--){
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scanf("%d", &N);
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sum = 0.0;
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for(int i = 0; i < N; ++i){
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scanf("%lf",&k);
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sum += k;
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}
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for(int i = 0; i < N; ++i)
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scanf("%d", &c);
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printf("Case #%d: %.6f\n",cas++,(N + 1.0) / sum);
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}
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return 0;
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}
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