#include <iostream>
#include <cstdlib>
using namespace std;

int main()
{
    const int temp[][3] {
        {45, 60, 52},
        {48, 62, 55},
        {50, 64, 58},
        {47, 59, 53},
        {49, 63, 56}
    };

    const size_t nrows {size(temp)};
    const size_t ncols {size(temp[0])};

    int sum {0};

    cout << "Temperatures for the week:\n";

    for (size_t row {0}; row < nrows; ++row) {
        cout << "Day " << row << ": ";
        for (size_t col {0}; col < ncols; ++col) {
            cout << temp[row][col] << " ";
            sum += temp[row][col];
        }
        cout << "\n";
    }

    const double avg {(double)sum / (nrows * ncols)};

    cout << "Average temperature: " << avg << "\n";

    return EXIT_SUCCESS;
}