Problem: Given a Direct Graph G (as shown in Fig Below). Each vertex represent a sensor node (have a limited battery). A link ->  has a weight (represents the probability that will send the data packet to ). This weight will be fixed for a t seconds and then will be changed after that, as the battery of the nodes will be consumed per time. For example, as shown in Figure below, say we have node , pr( -> )=0.3; pr( -> )=0.5; pr( -> )=0.2; ; after a time t, this probability distribution will be changed ( according to the energy level of the battery ).

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