Давид 3 задача

#include<iostream>
#include<cmath>

using namespace std;

double branch(double x, double b, double c){
    double d = 0;
    if(x>=0 && x<=1){
        d = cos(1-(c*pow(x,2)/b));
        if(d < pow(sin(x), 2)){
            d = pow(sin(x), 2);
        }
    }
    else{
        if( x > 1){
            d = c;
            if(d < x){
                d = x;
            }

            double d1 = sqrt(x);
            if(d1 > sqrt(b) + c){
                d1 = sqrt(b) + c;
            }

            if(d < d1){
                d = d1;
            }
        }
        else{
            d = exp(b*x+c);
        }
    }
    return d;
}

int main(){
    double x, b, c, d;
    cin >> x >> b >> c;
    d = branch(x,b,c);
    cout << d;
}