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#include <iostream>
#include <cmath>
using namespace std;
int main()
{
int x, y;
cin >> x;
if (x == 0 || cos(x) == 0){
cout << "нет решения";
}
else{
y = (log(abs(cos(x)))) / (log(1 + x*x));
cout << y;
}
return 0;
}
Cpp
INFO