7th_H

一道很简单的模拟题

#include<cstdio>
int main() {
	int a, b, X, vx, vy, vz;
	scanf("%d%d%d%d%d%d", &a, &b, &X, &vx, &vy, &vz);
	if (vx <= 0)
		printf("impossible\n");
	else {
		double fx = X;
		double t = fx / vx;
		double sy = vy * t;
		double sz = vz * t;
		double yy=1;
		double zz=1;
		if(sy<0){
			yy=-1;
			sy=-sy;
		}
		if(sz<0){
			zz=-1;
			sz=-sz;
		}
		while (sy > (2 * a))
			sy -= (2 * a);
		while (sz > (2 * b))
			sz -= (2 * b);
		double ry, rz;
		if (sy > (3 * a / 2)) {
			ry = sy - a*2;
		} else if (sy > a / 2) {
			ry = a - sy;
		} else {
			ry = sy;
		}
		if (sz > (3 * b / 2)) {
			rz = sz - b*2;
		} else if (sz > b / 2) {
			rz = b - sz;
		} else {
			rz = sz;
		}
		printf("%.3lf %.3lf %.3lf\n",fx ,ry*yy, rz*zz);
	}
	return 0;
}