标签:style http color os io ar 代码 amp
推公式,r′=dr/dt=vy=v22?v12r2/R2????????????√,可得积分公式为
∫R0y=1/v22?v12x2/R2?????????????√,利用三角换元去化简即可
代码:
#include <cstdio> #include <cstring> #include <cmath> typedef long long ll; int t; double v1, v2, r, d; int main() { scanf("%d", &t); while (t--) { scanf("%lf%lf%lf%lf", &v1, &v2, &r, &d); double ti = asin(r * v1 / r / v2) * r / v1 - asin(0.0) * r / v1; if (ti * v2 > d) printf("Why give up treatment\n"); else printf("Wake up to code\n"); } return 0; }
HDU 4969 Just a Joke(积分),布布扣,bubuko.com
标签:style http color os io ar 代码 amp
原文地址:http://blog.csdn.net/accelerator_/article/details/38690793