1 #define pb push_back 2 #define maxSize 3939 3 #define _for(i,a,b) for(int i = (a);i < (b);i ++) 4  5 const int N = 101; 6 class Solution 7 { 8     public: 9         vector
     
       commonChars(vector
      
       & A)10         {11             int hash[N][N]; 12             memset(hash,0,sizeof(hash));13             14             int sz = A.size();15             _for(i,0,sz)16             {17                 _for(j,0,A[i].size())18                 {19                     hash[i][A[i][j]-'a'] ++;20                 }21             }22             23             vector
       
         rnt;24             for(int i = 0;i < 26;i ++)25             {26                 int mm = INT_MAX;27                 for(int j = 0;j < sz;j ++)28                 {29                     mm = min(mm,hash[j][i]);30                 }31                 char aaa = 'a'+i;32                 string aa;33                 aa += aaa;34                 for(int j = 0;j < mm;j ++)35                 {36                     rnt.push_back(aa);37                 }38             }39             return rnt;40         }41 };
       
      
     

水题，没啥好说的