[parallel-computing : lab2]: fix sending and receiving data
[parallel-computing : lab2]: fix sending and receiving data

Drapegnik/bsu,Drapegnik/bsu,Drapegnik/bsu,Drapegnik/bsu,Drapegnik/bsu,Drapegnik/bsu,Drapegnik/bsu,Drapegnik/bsu,Drapegnik/bsu