I-------------------------I---+71-------I prima gramada
I-------------------------I a 2a gramada
I-------------------------I-------+200------------------I a 3a gramada
1000-71-200=729
729:3=243 kg in a2a gramada
243+71=314 kg in prima gramada
243+200=643 kg in a 3a gramada
verificare
243+214+443=1000