GATE Computer Science (CS) 2019 Solved Papers

Consider three concurrent processes $\mathit{P}1,\mathit{P}2$ and $\mathit{P}3$ as shown below, which access a shared variable D that has been initialized to 100 .The processes are executed on $\mathit{a}$ uniprocessor system running a time-shared operating system. If the minimum and maximum possible values of D after the three processes have completed execution are $\mathit{X}$ and $\mathit{Y}$ respectively, then the value of $\mathit{Y}-\mathit{X}$ is _____________.