lightoj 1043 - Triangle Partitioning 公式

因为是相似三角形，长度比的平方等于面积比...

#include<bits/stdc++.h>using namespace std;#define ll long long#define ull unsigned long long#define mod 1000007#define inf 0x3f3f3f3f#define N 100100using namespace std;int main(){    int t;    scanf("%d",&t);    for(int cas=1; cas<=t; cas++)    {       double a,b,c,d;       scanf("%lf %lf %lf %lf",&a,&b,&c,&d);       printf("Case %d: %.7f\n",cas,a*sqrt(d/(d+1)));    }    return 0;}