move e2 to e3
shortest path with e log v

--HG--
rename : exercise/ex06/e2_shortest/data/1.in => exercise/ex06/e3_columbia/data/1.in
rename : exercise/ex06/e2_shortest/data/1.sol => exercise/ex06/e3_columbia/data/1.sol
rename : exercise/ex06/e2_shortest/data/1.sol2 => exercise/ex06/e3_columbia/data/1.sol2
rename : exercise/ex06/e2_shortest/data/10.in => exercise/ex06/e3_columbia/data/10.in
rename : exercise/ex06/e2_shortest/data/10.sol => exercise/ex06/e3_columbia/data/10.sol
rename : exercise/ex06/e2_shortest/data/10.sol2 => exercise/ex06/e3_columbia/data/10.sol2
rename : exercise/ex06/e2_shortest/data/2.in => exercise/ex06/e3_columbia/data/2.in
rename : exercise/ex06/e2_shortest/data/2.sol => exercise/ex06/e3_columbia/data/2.sol
rename : exercise/ex06/e2_shortest/data/2.sol2 => exercise/ex06/e3_columbia/data/2.sol2
rename : exercise/ex06/e2_shortest/data/3.in => exercise/ex06/e3_columbia/data/3.in
rename : exercise/ex06/e2_shortest/data/3.sol => exercise/ex06/e3_columbia/data/3.sol
rename : exercise/ex06/e2_shortest/data/3.sol2 => exercise/ex06/e3_columbia/data/3.sol2
rename : exercise/ex06/e2_shortest/data/4.in => exercise/ex06/e3_columbia/data/4.in
rename : exercise/ex06/e2_shortest/data/4.sol => exercise/ex06/e3_columbia/data/4.sol
rename : exercise/ex06/e2_shortest/data/4.sol2 => exercise/ex06/e3_columbia/data/4.sol2
rename : exercise/ex06/e2_shortest/data/5.in => exercise/ex06/e3_columbia/data/5.in
rename : exercise/ex06/e2_shortest/data/5.sol => exercise/ex06/e3_columbia/data/5.sol
rename : exercise/ex06/e2_shortest/data/5.sol2 => exercise/ex06/e3_columbia/data/5.sol2
rename : exercise/ex06/e2_shortest/data/6.in => exercise/ex06/e3_columbia/data/6.in
rename : exercise/ex06/e2_shortest/data/6.sol => exercise/ex06/e3_columbia/data/6.sol
rename : exercise/ex06/e2_shortest/data/6.sol2 => exercise/ex06/e3_columbia/data/6.sol2
rename : exercise/ex06/e2_shortest/data/7.in => exercise/ex06/e3_columbia/data/7.in
rename : exercise/ex06/e2_shortest/data/7.sol => exercise/ex06/e3_columbia/data/7.sol
rename : exercise/ex06/e2_shortest/data/7.sol2 => exercise/ex06/e3_columbia/data/7.sol2
rename : exercise/ex06/e2_shortest/data/8.in => exercise/ex06/e3_columbia/data/8.in
rename : exercise/ex06/e2_shortest/data/8.sol => exercise/ex06/e3_columbia/data/8.sol
rename : exercise/ex06/e2_shortest/data/8.sol2 => exercise/ex06/e3_columbia/data/8.sol2
rename : exercise/ex06/e2_shortest/data/9.in => exercise/ex06/e3_columbia/data/9.in
rename : exercise/ex06/e2_shortest/data/9.sol => exercise/ex06/e3_columbia/data/9.sol
rename : exercise/ex06/e2_shortest/data/9.sol2 => exercise/ex06/e3_columbia/data/9.sol2
rename : exercise/ex06/e2_shortest/gen.rb => exercise/ex06/e3_columbia/gen.rb
rename : exercise/ex06/e2_shortest/problem_en.odt => exercise/ex06/e3_columbia/problem_en.odt
rename : exercise/ex06/e2_shortest/problem_en.pdf => exercise/ex06/e3_columbia/problem_en.pdf
rename : exercise/ex06/e2_shortest/solution/shortest => exercise/ex06/e3_columbia/solution/shortest
rename : exercise/ex06/e2_shortest/solution/shortest.cpp => exercise/ex06/e3_columbia/solution/shortest.cpp
rename : exercise/ex06/e2_shortest/solution/shortest_v2 => exercise/ex06/e3_columbia/solution/shortest_v2
rename : exercise/ex06/e2_shortest/solution/shortest_v2.cpp => exercise/ex06/e3_columbia/solution/shortest_v2.cpp