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P5082 成绩

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Baoshuo Ren 2021-06-30 08:17:02 +08:00 committed by Baoshuo Ren
parent 1ca38e37c8
commit e9d383c241
Signed by: baoshuo
GPG Key ID: 70F90A673FB1AB68
1 changed files with 21 additions and 0 deletions
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Luogu/problem/P5082/P5082.cpp Normal file
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#include <bits/stdc++.h>
using namespace std;
long long n, a[10000005], b[10000005], c[10000005], a1, b1, c1;
int main() {
cin >> n;
for (int i = 0; i < n; i++) {
cin >> a[i];
a1 += a[i];
}
for (int i = 0; i < n; i++) {
cin >> b[i];
c[i] = a[i] - b[i];
b1 += b[i];
c1 += c[i];
}
cout << fixed << setprecision(6) << 1.00 * (a1 * 3 - b1 * 2) / c1 << endl;
return 0;
}