#include <stdio.h>

double sp(int r[2]) {
    double V[] = {0,0};
    double v = 1;
    for (int Vv = 0; Vv<r[1]; Vv++) {
        v *= 0.1;
    }
    for(double k = 1; k>v ; k *= 0.1) {
        while(((2*V[0]+V[1])*V[1])<(r[0]-V[0]*V[0])){
            V[1] += k;
        }
        V[0] += V[1] - k;
        V[1] = 0;
    }
    
    return V[0];
}
int main() {
    int V[] = {2,10};
    printf("%f",sp(V));
}