#include "math.h"

int add(int x, int y) { return x + y; }
int subtract(int x, int y) { return x - y; }
double divide(int x, int y) {
  if (y == 0)
    return 0.0;
  return (double)x / y;
}
int mulitply(int x, int y) { return x * y; }
int doubleVal(int x) { return x * 2; }
int power(int x, int p) {
  int val = 1;
  for (int i = 1; i <= p; i++) {
    val *= x;
  }
  return val;
}
double squareRoot(int x) {
  double sqrt, val;

  sqrt = divide(x, 2);
  val = 0;

  while (sqrt != val) {
    val = sqrt;

    sqrt = (x / val + val) / 2;
  }
  return sqrt;
}