#include <stdio.h>
#include <math.h>

#define N 100

double f(double y){
    return y*cos(y);
}

int main(){
    double T=12;
    double h=T/N;
    double y=1;
    for(int k=1;k<=N;k++){
        y=y+f(y)*h;
        printf("%g %g\n",k*h,y);
    }
    return 0;
}