#include <iostream>
#include <math.h>
#include <complex>
#include <cstring>
using namespace std;

int main() {
int n;
double y,x,step, min=INT_MAX, res;
cout << "How much portions ";
cin >> n;
cout << "Enter step   ";
cin >> step;
x = 2-step;

for(int i= 0; i<n; i++){
    x+=step;
    y = log10(cosh(x))-tanh(x)+0.5;
    if(min > y){
        min = y;
        res = x;
    }
}
    cout << "The min value is  "<<min<<"   The answer is  "<< res<<endl;

    return 0;
}