2 3 / \ 3 3 /// 1 5 ///// 5 1 \ \ \ \ \ 5 5 ///// / / / / / / ///// 20 20 /\/\//\/\/\//\/\/\// \\\//\///\//\//\//\\ \\/\///\/\/\/\///\// \\//\/////\//\\\\/// ///\//\//\///\//\/// \\\\\/\//\\////\\\\/ /\////\////\\//\//// \\////\//\/\/\////// \\\/\/\///\//\/\/\// \\/\/\\\/\/\\/\\//// \\\\\//\\\\//\\///\\ \//\///\\\/\/\\/\\\\ \/\/\//\\/\\/\\/\\// \\\\/\/\\/\/\//\//\/ ////\//\//\//\//\//\ \/\/\///\/\/\///\\// \\\\/\/\//\//\\/\/\/ \/\/\/\\/\/\/\///\// \\\/\//\\//\//\//\/\ \/\/\//\//\//\/\/\// 0 0