http://acm.nyist.net/JudgeOnline/problem.php?pid=626

intersection set

时间限制:1000 ms  |  内存限制:65535 KB
难度:1
 
描述
两个集合,你只需要求出两个集合的相同元素,并输出个数。
 
输入
m n
{a1 , a2 , a3 , a4 … ai … am}
{b1 , b2 , b3 , b4 … bi … bn}
1 <= n , m <= 50000 , 保证一个集合中不会输入重复数据
0 <= ai , bi <= 100000
多组测试数据
输出
一行一个数据,为两个集合中相同的元素个数
样例输入
8 8
1 5 6 9 10 12 16 59
5 6 9 8 15 17 65 98
样例输出
3

分析:
把两组数据直接存到一个数组里,sort排序去重即可。

AC代码:

 #include <stdio.h>
#include <algorithm>
using namespace std;
int num[];
int main()
{
int m,i,n,count;
while(~scanf("%d %d",&m,&n))
{
count=;
for(i=;i<m+n;i++)
scanf("%d",&num[i]);
sort(num,num+m+n);
for(i=;i<n+m-;i++)
if(num[i]==num[i+])
count++;
printf("%d\n",count);
}
return ;
}

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