SP18187 INGRED - Ingredients

You are given **n** cities with **m** bi-directional roads connecting them and the length of each road. There are two friends living in different cities who wish to collect some ingredients available at different stores to make cake. There are s such stores. They need not come back home after purchasing the ingredients. Petrol is expensive and they would hence like to travel minimum total distance (sum of distance distance traveled by both kids). Help them find out what this distance is.

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