#include <bits/stdc++.h>
int main(void) {
  long long int a, b, c;
  scanf("%lld %lld %lld", &a, &b, &c);
  if ((a + b) * 2 <= c) {
    printf("Yes");
  } else if (c - a - b <= 0) {
    printf("No");
  } else if (pow(a, 2) + pow(b, 2) + pow(c, 2) - 2 * (a * b) - 2 * (b * c) -
                 2 * (c * a) >
             0) {
    printf("Yes");
  } else
    printf("No");
  return (0);
}
