func_code_string: #include <bits/stdc++.h>   int main() {     double y1, y2, yw, xb, yb, r, A, B, C;     scanf( %lf%lf%lf%lf%lf%lf , &y1, &y2, &yw, &xb, &yb, &r);     yw -= r;     y1 += r;     yb = 2 * yw - yb;     A = y1 - yb;     B = xb;     C = -B * y1 + B * y2;     if ((C / sqrt(A * A + B * B)) <= r) {       printf( -1 );       return 0;     }     C = -B * y1;     printf( %.10lf , (-C - B * yw) / A);     return 0;   }   