S=ruma
r=rest
ziua1: s-(s/3+180)=R1
ziua2: R1-(R1/3+180)=R2
ziua 3: R2-(R2/3+180)=R3
ziua4: R3=480
ziua 3: R2-(R2/3+180)=R3
R2-(R2/3+180)=480
3r2-r2+540=1440
2R2=900
R2=450
ziua2: R1-(R1/3+180)=450
3R1-R1+540=1350
2R1=810
R1=405
ziua1: s-(s/3+180)=405
3s-s+540=1215
2s=675
s=337.5