CazadorDivino's blog

By CazadorDivino, history, 8 years ago, In English

In this problem, what is the meaning of "as well as the reversal of the bus, take place immediately and this time can be neglected." in this problem. I can two possibilities. 1, back the bus to collect pupils does not last any (immediate). 2, turn the car back nothing lasts for (immediate), but the movement to pick up a pupil (bakc) is counted in time.

Thanks for clearing my doubt.

I'm trying to understand the problem's solution.

int main() {
    int n, k;
    D l, v1, v2;
    cin >> n >> l >> v1 >> v2 >> k;
    
    
    int b = (n + k - 1) / k;
    cout<< "("<< n<< "+"<< k <<"- 1)"<< "/"<< k<< "= "<< b<< endl;
    double den = (2 * (b - 1) * v1 / (v1 + v2)) + 1;
    cout<<"(2 * ("<<b <<"- 1) * "<<v1 <<"/ ("<<v1 <<"+"<< v2<<")) +"<< 1 << "=" << den<<endl;
    double x = l / den;
    cout<< l <<"/ "<<den<<"="<< x<< endl;
    double ans = x / v2 + (l - x) / v1;
    cout<< x <<"/"<< v2 <<"+" <<"("<<l <<"-"<< x<<") / "<<v1 << "="<< ans<< endl;
    printf("%0.9f\n", ans);
    return 0;
}
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