import std.stdio, std.conv, std.string, std.algorithm, std.math, std.array, std.container;

bool solve() {
  long[] abc = readln.chomp.split.to!(long[]);
  return abc[2]-abc[1]-abc[0] > 2*sqrt(abc[0]*abc[1].to!double);
}

void main() {
  if(solve) writeln("Yes");
  else writeln("No");
}

