Easy to read, commented C++ solution, BFS approach O(mn) time, O(m+n) space - Count Servers that Communicate - LeetCode

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C++CJavaPythonPython3JavaScriptC#SwiftGoRubyRustTypeScriptKotlinElixirDepth-First SearchUnion FindMatrixArrayBreadth-First SearchCountingGraphHash TableDynamic ProgrammingRecursionIteratorOrdered SetBit ManipulationOrdered MapInteractivePrefix Sum