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- #include<stdio.h>
- #include<stdlib.h>
- #include<math.h>
- #include<string.h>
- long long n, m, flag=0, arr[20000009], i, tmp[20000009];
- int main()
- {
- while(scanf("%lld %lld", &n, &m)!=EOF)
- {
- memset(arr,0,sizeof arr);
- memset(tmp,0,sizeof tmp);
- if(n==0 && m==0)
- break;
- for(i=0; i<m+n; i++)
- {
- scanf("%lld", &arr[i]);
- }
- for(i=0; i<n+m; i++)
- {
- tmp[arr[i]]+=1;
- if(tmp[arr[i]]>1)
- {
- flag++;
- }
- }
- printf("%lld\n", flag);
- for(i=0; i<n+m; i++)
- {
- tmp[arr[i]]=0;
- }
- flag=0;
- }
- return 0;
- }
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