990. Satisfiability of Equality Equations ⭐
Medium
You are given an array of strings equations
that represent relationships between variables where each string equations[i]
is of length 4
and takes one of two different forms: "xi==yi"
or "xi!=yi"
.Here, xi
and yi
are lowercase letters (not necessarily different) that represent one-letter variable names.
Return true
if it is possible to assign integers to variable names so as to satisfy all the given equations, or false
otherwise.
Example 1:
Example 2:
Constraints:
1 <= equations.length <= 500
equations[i].length == 4
equations[i][0]
is a lowercase letter.equations[i][1]
is either'='
or'!'
.equations[i][2]
is'='
.equations[i][3]
is a lowercase letter.
解題
Runtime: 0 ms, faster than 100%
Memory Usage: 0 MB, less than 100%
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