suma in cub (14) 20pct

#include <bits/stdc++.h>
using namespace std;
constexpr int NMAX = 53;
int cube[NMAX][NMAX][NMAX], n;

void readCube() {
    cin >> n;
    for (int z = 1; z <= n; z++) {
        for (int x = 1; x <= n; x++) {
            for (int y = 1; y <= n; y++) {
                cin >> cube[z][x][y];
            }
        }
    }
}

signed main() {
    readCube();
    int x1, x2, y1, y2, z1, z2;
    cin >> x1 >> y1 >> z1 >> x2 >> y2 >> z2;
    int sum = 0;
    for (int z = z1; z <= z2; z++) {
        for (int x = x1; x <= x2; x++) {
            for (int y = y1; y <= y2; y++) {
                sum += cube[z][x][y];
            }
        }
    }
    cout << sum << endl;
    return 0;
}