#include <iostream>  
#include <cmath>  
double f(double x){  
    return pow(x,2*x)-1;  
}  
int main(){  
    double a=0.0,b=1.0;  
    double c;  
    double omg=1e-6;  
    if (f(a) * f(b)>=0){  
        return -1;  
    }  
    while (fabs(b-a)=omg){  
        c=(a+b)/2;  
        if (f(c)==0.0){  
            break;
        } else if (f(c)*f(a)<0){  
            b=c;
        }else{  
            a=c;
        }  
    }  
    return 0;  
}