#include <iostream>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#define g 9.80665 //m/s^2
#define T_MAX 10 //sec
#define Y_MIN -100
using namespace std;
int main(int argc, char *argv[]){
  //calculate the freefall
  int t;
  double y,vy;
t=0;
  y=0;
  vy=0;
  for(t=0;t<T_MAX+1;t++){
    cout << "t="<<t<<"\tvy="<<vy<<"\ty="<<y<<endl;
    if(y<Y_MIN){
      break;
    }
    else{
      y+=vy; // same as y=y-vy
      vy-=g; // same as vy=vy-g
    }
  }
  return 0;
}