Lambda sort

//g++  5.4.0
#include <algorithm>
#include <vector>
#include <iostream>

#define I 4
#define J 2

using namespace std;

struct matched_row
{
  int arr[J];
  int max;
};

int main()
{
    int matrix[I][J]{{3, 4}, {5, 6}, {7, 8}, {9, 10}};

    vector<matched_row> matched;
    matched_row mr;
    copy(begin(matrix[2]), end(matrix[2]), begin(mr.arr));
    mr.max = 8;
    matched.push_back(mr);
    copy(begin(matrix[3]), end(matrix[2]), begin(mr.arr));
    mr.max = 10;
    matched.push_back(mr);

    sort(matched.begin(), matched.end(), [](matched_row &i, matched_row &j)->bool{ return (i.max < j.max); });

    cout << matched[0].max;

    return 1;
}