Evaluate Division

You are given equations such as A / B = k, represented by equations[i] = [A, B] and values[i] = k. For each query [C, D], return the value of C / D if it can be derived from the given equations, or -1.0 otherwise. Evaluate Division You are given equations such as A / B = k, represented by equations[i] = [A, B] and values[i] = k. For each query [C, D], return the value of C / D if it can be derived from the given equations, or -1.0 otherwise. SWE graph dfs union-find medium Frequency Single report Last asked 2026-02-15 Stage phone-screen Evaluate Division You are given equations such as A / B = k, represented by equations[i] = [A, B] and values[i] = k. For each query [C, D], return the value of C / D if it can be determined from the given equations, or -1.0 otherwise. Examples Example 1: Input: equations = [["a","b"],["b","c"]], values = [2.0,4.0], queries = [["a","c"],["c","a"],["a","e"]] Output: [8.0,0.125,-1.0] Constraints 1 <= equations.length <= 20 values.length == equations.length 1 <= queries.length <= 20 Variable names are non-empty strings.