///給你n個點 枚舉三點求最小三角形面積 # include # include# include # include # include # include using namespace std; int main() { int t,n,i,j,k; double x[110],y[110],minn,s; while(~scanf("%d",&t)) { while(t--) { scanf("%d",&n); for(i=0; i =0.005) { minn=min(s,minn); flag=1; } } } } if(flag) printf("%.2lf\n",minn); else printf("Impossible\n"); } } } return 0; }