#include <conio.h>
#include <math.h>
#include <iostream.h>
#define pi 3.14
 
double f(double x) {
 
    return   x*x-(cos(pi*x));
}
 
double f1(double x) {
 
    return   2*x+(1/x);
}
 
double f2(double x) {
 
    return   2+(-1/(x*x));
}
 
int main() {
    int n=0;
    double a,b,c,eps;
    cout<<"a="; cin>>a;
    cout<<"b="; cin>>b;
    cout<<"eps="; cin>>eps;
    if(f(a)*f2(a)>0) c=a;
    else c=b;
    do {
        c=c-f(c)/f1(c);
        n+=1;
    }
    while (fabs(f(c))>=eps);
        cout<<"c="<<c<<"\n";
        cout<<"n="<<n<<"\n";
        getch();
    return 0;
}