Update README.md

README.md

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-# Attention-based-GNN-reinforcement-learning-for-Knapsack-Problem
+# Attention-based-GNN-reinforcement-learning-for-Knapsack-Problem
+
+Repo for knapsack problem solution based on reinforcement learning (Attention Based Graph Neural Network)
+
+## To run:
+Simply execute the jupyter notebook (main_knapsack)
+
+## Notes:
+I have checked proper execution for 20 nodes (items-values pairs).
+
+## TO_Do:
+1. Change the names of files and function suitable for knapsack
+This is modified version of original vrp repo, so I have kept the changes minimal as they wont affect functionality,
+but might be confusing. SInly follow the jupter notebook.
+
+## Further Notes:
+This is modified version of original repo .[src](https://arxiv.org/abs/1803.08475)
+Changes:
+1. Modify VRP to Knapsack Problem
+2. Data Generation suitable for knapsack problem (This could be modified by the use as needed to fit for given problem)
+3. Loss for the selected item_value pair