The heat extracted out of x gram of water initialy at  $$50°$$C to  cool it down to $$0°$$C is sufficient to evaporate  $$(1000 - x)$$ gram  of water also initialy at $$50°$$C. The value of $$x$$ (closest integer) is_______.  (Take Latent heat of water  $$L = 2256$$ kJ/kg K, specific heat capacity of water $$c = 4200$$ J/kg·K)