【积分】【概率】Probability, UVa11346

精度莫名被卡

#include<bits/stdc++.h>using namespace std;int T;double a,b,s;const double eps = 1e-8;int main(){scanf("%d",&T);while(T--){scanf("%lf%lf%lf",&a,&b,&s);double m = a*b,ans = 0;if(s>m)ans = 0;else if(s<eps)ans = 100.0;else ans = (m-s-1.0*s*log(m*1.0/s))/m*100;if(100-ans<=eps)ans = 100;printf("%.6f%%\n",ans);}return 0;}