11-散列1 电话聊天狂人 (25 分)

给定大量手机用户通话记录，找出其中通话次数最多的聊天狂人。

输入格式:

输入首先给出正整数

输出格式:

在一行中给出聊天狂人的手机号码及其通话次数，其间以空格分隔。如果这样的人不唯一，则输出狂人中最小的号码及其通话次数，并且附加给出并列狂人的人数。

输入样例:

4
13005711862 13588625832
13505711862 13088625832
13588625832 18087925832
15005713862 13588625832

输出样例:

13588625832 3

//2，3测试点未过
#include<iostream>
#include<map>
using namespace std;
const int maxn = 1000100;int main(){int n;//scanf("%d",&n);cin >> n;map<string,int> mp; string s1,s2;for(int i = 0; i < n; i++){cin >> s1 >> s2;++mp[s1];++mp[s2];}int cnt = 0;//通话最多次人数int time = -1;//通话最多次的时间string s;//通话最多次最小标号 map<string,int>::iterator it;for(it = mp.begin(); it != mp.end(); it++){if(it->second > time){cnt = 1;time = it->second;s = it->first;}else if(it->second == time){cnt++;if(s < it->first) s= it->first;}}cout << s << " " << time;if(cnt > 1) cout << " " << cnt << endl;return 0;
}

https://blog.csdn.net/xijujie/article/details/53224218

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define N 12typedef struct ListNode *Position;
typedef struct HTable *HashTable;
struct ListNode {char data[N];int count;Position next;
};
struct HTable {Position list;int size;
};
HashTable CreatTable(int n);
void Insert(HashTable H, char *key);
void Solve(HashTable H);
int NextPrime(int n);int main() {int i, n;char key[N];HashTable H;scanf("%d", &n);H = CreatTable(n * 2);for (i = 0; i < 2 * n; i++) {scanf("%s", key);Insert(H, key);}Solve(H);return 0;
}HashTable CreatTable(int n) {HashTable H;int i;H = (HashTable)malloc(sizeof(struct HTable));H->size = NextPrime(n);H->list = (Position)malloc(H->size*sizeof(struct ListNode));for (i = 0; i < H->size; i++) H->list[i].next = NULL;    return H;
}void Insert(HashTable H, char *key) {Position p, temp;int h;h = (atoi(key + 6)) % H->size;p = H->list[h].next;while (p && strcmp(p->data, key)) {p = p->next;}if (p) p->count++;else {temp = (Position)malloc(sizeof(struct ListNode));strcpy(temp->data, key);temp->count = 1;temp->next = H->list[h].next;H->list[h].next = temp;}
}void Solve(HashTable H) {int i, max = 0, num;char min[N];Position p;for (i = 0; i < H->size; i++) {p = H->list[i].next;while (p) {if (p->count > max) {max = p->count;strcpy(min, p->data);num = 1;}else if (p->count == max) {num++;if (strcmp(p->data, min) < 0)strcpy(min, p->data);}p = p->next;}}if(num == 1)printf("%s %d\n", min, max);elseprintf("%s %d %d\n", min, max, num);}int NextPrime(int n) {int i, j;n = (n % 2) ? n + 2 : n + 1;for (i = n;; i += 2) {for (j = 3; j*j <= i && i%j; j++);if (j*j > i) break;}return i;
}

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<math.h>#define MAXS 11
#define MAXD 5typedef struct HashEntry *List;
struct HashEntry{char PhoneNo[MAXS+1];int Cnt;List Next;
};struct HashTb1{int TableSize;List TheLists;
};
typedef struct HashTb1 *HashTable;int NextPrime(int N){int i;if(!(N%2))N++;for(;;N+=2){for(i=(int)sqrt(N);i>2;i--){if(!(N%i))break;}if(i==2)break;}return N;
}HashTable InitializeTable(int N){int i;HashTable H=(HashTable)malloc(sizeof(struct HashTb1));H->TableSize=NextPrime(N);H->TheLists=(List)malloc(sizeof(struct HashEntry)*H->TableSize);for(i=0;i<H->TableSize;i++){H->TheLists[i].Cnt=0;H->TheLists[i].Next=NULL;H->TheLists[i].PhoneNo[0]='\0';}return H;
}int Hash(int Key,int P){return Key%P;
}void InsertAndCount(char *Key,HashTable H){List Ptr,NewCell,L;L=&(H->TheLists[Hash(atoi(Key+6),H->TableSize)]);Ptr=L->Next;while(Ptr&&strcmp(Ptr->PhoneNo,Key)){Ptr=Ptr->Next;}if(Ptr){Ptr->Cnt++;    }else{NewCell=(List)malloc(sizeof(struct HashEntry));strcpy(NewCell->PhoneNo,Key);NewCell->Cnt=1;NewCell->Next=L->Next;L->Next=NewCell; }
}void Output(HashTable H){int i,MaxCnt,PCnt;List Ptr;char MinPhone[MAXS+1];MaxCnt=PCnt=0;MinPhone[0]='\0';for(i=0;i<H->TableSize;i++){Ptr=H->TheLists[i].Next;while(Ptr){if(Ptr->Cnt>MaxCnt){MaxCnt=Ptr->Cnt;strcpy(MinPhone,Ptr->PhoneNo);PCnt=1;}else if(Ptr->Cnt==MaxCnt){PCnt++;if(strcmp(MinPhone,Ptr->PhoneNo)>0){strcpy(MinPhone,Ptr->PhoneNo);}}Ptr=Ptr->Next;}}printf("%s %d",MinPhone,MaxCnt);if(PCnt>1){printf(" %d",PCnt);}
//    printf("\n");
}
int main(){int N,i;char Key[MAXS+1];HashTable H;scanf("%d",&N);H=InitializeTable(N);for(i=0;i<N;i++){scanf("%s",Key);InsertAndCount(Key,H);scanf("%s",Key);InsertAndCount(Key,H);}Output(H);    
}