只要努力飞翔，即使再弱小的蝴蝶也可以飞的很高
1
SQSQ • 2年前
include <bits/stdc++.h> using namespace std; int main()
{ double a, b, c=0; cin>>a; for(int i=1;i<=a;i++) { cin >> b; c = c+b; } printf("%.2f", c/a); return 0; }
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Chris_Pan • 2年前