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- #include <fstream>
- #include <algorithm>
- using namespace std;
- int main()
- {
- int n,m;
- ifstream fin("bal.in");
- fin>>n>>m;
- int f[n+1],b[m+1];
- for(int i=0;i<n;++i)
- fin>>f[i];
- for(int i=0;i<m;++i)
- fin>>b[i];
- sort(f,f+n);
- sort(b,b+m);
- int i=0,j=0,p=0;
- while(i<n&&j<m)
- if(f[i]<=b[j])
- ++p,++i,++j;
- else
- ++j;
- ofstream fout("bal.out");
- fout<<p;
- return 0;
- }
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