Add xor_submatrix and SBCs

algorithms/structure/trie.cpp

contests/Cadernaveis/BALE11.cpp

contests/Cadernaveis/DESCULPA.cpp

contests/Cadernaveis/GINCAN11.cpp

contests/Cadernaveis/NTICKETS.cpp

contests/Cadernaveis/TOPOLAND.cpp

contests/Cadernaveis/URI1135.cpp

contests/Cadernaveis/URI1464.cpp

contests/GYM_101492/K.cpp

contests/SBC17/D.cpp

contests/SBC17/E.cpp

contests/SBC17/F.cpp

contests/SBC17/G.cpp

contests/SBC17/J.cpp

contests/SBC17/M.cpp

contests/SBC18/C.cpp

contests/SBC18/D.cpp

contests/SBC18/E.cpp

contests/SBC18/F.cpp

contests/SBC18/I.cpp