#include <bits/stdc++.h>

using namespace std;

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    int n;
    cin >> n;
    vector<vector<int>> v(n);
    for(int i = 0; i < n; i++) {
        int k;
        cin >> k;
        for(int j = 2; j <= k; j++) {
            while(k % j == 0) {
                v[i].push_back(j);
                k /= j;
            }
        }
    }
    vector<int> u = v[0];
    for(int i = 1; i < n; i++) {
        vector<int> tmp;
        set_intersection(u.begin(), u.end(), v[i].begin(), v[i].end(), back_inserter(tmp));
        u = tmp;
        sort(u.begin(), u.end());
    }
    map<int, int> cnt;
    for(auto k : u) {
        cnt[k]++;
    }
    int ans = -1;
    for(auto k : cnt) {
        if(k.second > 1) {
            int aa = 1;
            for(int i = 0; i < k.second; i++) {
                aa *= k.first;
            }
            ans = max(ans, aa);
        }
    }
    if(ans == -1) {
        cout << "NO CIVIL WAR\n";
    } else {
        cout << ans << "\n";
    }
    return 0;
}