Задача 6

#include <iostream>
#include <fstream>
#include <vector>
#include <string>
#include <map>
using namespace std;



ifstream fin("input.txt");
ofstream out("output.txt");


int main()
{
    int n, m;
    fin >> n >> m;
    vector<vector<int> > a(n, vector<int>(m));
    for (int i = 0; i < n; ++i)
        for (int j = 0; j < m; ++j)
            fin >> a[i][j];
    for (int j = 0; j < m; ++j, out << '\n')
        for (int i = 0; i < n; ++i)
            out << a[i][j] << ' ';
}