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- #include <iostream>
- #include <fstream>
- using namespace std;
- ifstream fin("bac.in");
- int main()
- {
- int mat[20][20];
- unsigned int n, m;
- fin >> m >> n;
- for(int i = 0; i < m; i++)
- for(int j = 0; j < n; j++)
- fin >> mat[i][j];
- int nr = 0;
- for(int j = 1; j < n; j++)
- {
- for(int i = 0; i < m; i++)
- {
- if(mat[i][j] == mat[i][0])
- {
- nr++;
- break;
- }
- }
- }
- cout << n - nr - 1;
- return 0;
- }
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