void ChMax(int** matr, int n, int m)
{
    int i, j, max;
    for(i = 0; i < n; ++i)
    {
        max ^= max;
        for(j = 1; j < m; ++j)
            if(matr[i][j] > matr[i][max])
                max = j;
        matr[i][max] = 1;
    }
}