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1078 Hashing (25分)

The task of this problem is simple: insert a sequence of distinct positive integers into a hash table, and output the positions of the input numbers. The hash function is defined to be $( where$

Note that the table size is better to be prime. If the maximum size given by the user is not prime, you must re-define the table size to be the smallest prime number which is larger than the size given by the user.

Input Specification:

Each input file contains one test case. For each case, the first line contains two positive numbers:

Output Specification:

For each test case, print the corresponding positions (index starts from 0) of the input numbers in one line. All the numbers in a line are separated by a space, and there must be no extra space at the end of the line. In case it is impossible to insert the number, print "-" instead.

Sample Input:

4 4
10 6 4 15

Sample Output:

0 1 4 -

  1 #define _CRT_SECURE_NO_WARNINGS  
  2 #include<stdio.h>
  3 #include<malloc.h>
  4 #include<math.h>
  5 #define MAXTABLESIZE 20000
  6 
  7 typedef int ElementType;
  8 typedef enum { Legitimate, Empty, Deleted } EntryType;
  9 typedef struct HashEntry Cell;
 10 struct HashEntry
 11 {
 12     ElementType Data;
 13     EntryType Info;
 14 };
 15 
 16 typedef struct HblNode* HashTable;
 17 struct  HblNode
 18 {
 19     int TableSize;
 20     Cell* Cells;
 21 };
 22 
 23 int NextPrime(int N)
 24 {
 25     if (N == 1)
 26         return 2;
 27     int p = (N % 2) ? N + 2 : N + 1;
 28     int i;
 29     while (p<=MAXTABLESIZE)
 30     {
 31         for (i = (int)sqrt(p); i > 2; i--)
 32             if (p % i == 0)
 33                 break;
 34         if (i == 2)break;
 35         else
 36             p += 2;
 37     }
 38     return p;
 39 }
 40 int Hash(int Key, int TableSize)
 41 {
 42     return Key % TableSize;
 43 }
 44 HashTable CreateHashTable(int TableSize)
 45 {
 46     HashTable H;
 47     H = (HashTable)malloc(sizeof(struct HblNode));
 48     H->TableSize = NextPrime(TableSize);
 49     H->Cells = (Cell*)malloc(H->TableSize * sizeof(Cell));
 50     for (int i = 0; i < H->TableSize; i++)
 51         H->Cells[i].Info = Empty;
 52     return H;
 53 }
 54 
 55 int Find(HashTable H, ElementType Key)
 56 {
 57     int NewPos, CurPos;
 58     int CNum = 0;
 59     NewPos = CurPos = Hash(Key, H->TableSize);
 60     while (H->Cells[NewPos].Info!=Empty&&H->Cells[NewPos].Data!=Key)
 61     {
 62         ++CNum;
 63         int Flag = 0;
 64         NewPos = CurPos+CNum * CNum;
 65         if (CNum>=H->TableSize)
 66             return -1;
 67         while (NewPos >= H->TableSize)
 68             NewPos -= H->TableSize;
 69     }
 70     return NewPos;
 71 }
 72 
 73 int Insert(HashTable H, ElementType Key)
 74 {
 75     int Pos = Find(H, Key);
 76     if (Pos ==-1)
 77         return -1;
 78     if (H->Cells[Pos].Info != Legitimate)
 79     {
 80         H->Cells[Pos].Data = Key;
 81         H->Cells[Pos].Info = Legitimate;
 82     }
 83     return Pos;
 84 }
 85 
 86 int main()
 87 {
 88     int M, N;
 89     scanf("%d %d", &M, &N);
 90     HashTable H = CreateHashTable(M);
 91     int i;
 92     for (i = 0; i < N-1; i++)
 93     {
 94         int num;
 95         scanf("%d", &num);
 96         int Pos = Insert(H,num);
 97         if (Pos != -1)
 98             printf("%d ", Pos);
 99         else
100             printf("- ");
101     }
102     int num;
103     scanf("%d", &num);
104     int Pos = Insert(H, num);
105     if (Pos != -1)
106         printf("%d", Pos);
107     else
108         printf("-");
109     return 0;
110 }

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原文地址：https://www.cnblogs.com/57one/p/12071432.html