[Swift]LeetCode1198. 找出所有行中最小公共元素 | Find Smallest Common Element in All Rows

 1 class Solution {
 2     func smallestCommonElement(_ mat: [[Int]]) -> Int {
 3         let n:Int = mat.count
 4         var ps:[Int] = [Int](repeating:0,count:n)
 5         let m:Int = mat[0].count
 6         outer:
 7         for i in 0..<m
 8         {
 9             for j in 1..<n
10             {
11                 while(ps[j] < m && mat[j][ps[j]] < mat[0][i])
12                 {
13                     ps[j] += 1
14                 }
15                 if ps[j] < m && mat[j][ps[j]] == mat[0][i]
16                 {  
17                     continue
18                 }
19                 else
20                 {
21                     continue outer
22                 }
23             }
24             return mat[0][i]
25         }
26         return -1
27     }
28 }