Add Trie, problems, and change structure

README.md

algorithms/geometry/convex_hull.cpp

algorithms/graph/articulations_bridges.cpp

algorithms/graph/bfs.cpp

algorithms/graph/bipartite_match.cpp

algorithms/graph/dfs.cpp

algorithms/graph/dijkstra.cpp

algorithms/graph/floyd_warshall.cpp

algorithms/graph/kosaraju.cpp

algorithms/graph/kruskal.cpp

algorithms/graph/lca.cpp

algorithms/graph/tarjan.cpp

algorithms/graph/topological_sort.cpp

algorithms/math/fast_matrix_pow.cpp

algorithms/math/modular_multiplicative_inverse.cpp

algorithms/math/sieve_of_eratosthenes.cpp

algorithms/paradigm/edit_distance.cpp

algorithms/paradigm/kadane.cpp

algorithms/paradigm/lis.cpp

algorithms/paradigm/ternary_search.cpp