In file included from /in/driver/main.cpp:1:0:
/in/shortestP2P.hpp: In member function 'void ShortestP2P::computeShortestPaths()':
/in/shortestP2P.hpp:77:39: error: conversion to 'unsigned int' from 'std::vector<std::vector<std::pair<unsigned int, int> > >::size_type {aka long unsigned int}' may alter its value [-Werror=conversion]
         unsigned int V = adj_list.size();
                          ~~~~~~~~~~~~~^~
cc1plus: all warnings being treated as errors