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再水不过如此,20分钟一A水过。。。附代码#include<iostream> #include<math.h> #include<algorithm> using namespace std; #define MAX 101 double weight[MAX]; int n; bool cmp(int a, int b) { return a > b; } int main() { scanf("%d", &n); int i; for(i = 0; i < n; i ++) scanf("%lf", &weight[i]); for(i = 0; i < n - 1; i ++) { sort(weight + i, weight + n, cmp); weight[i + 1] = 2 * sqrt(double(weight[i] * weight[i + 1])); } printf("%.3lf\n", weight[n - 1]); } Followed by:
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