Language: C++

#include <bits/stdc++.h>
using namespace std;
// #include <atcoder/all>
// using namespace atcoder;
using ll = long long;
using pii = pair<int, int>;
using vi = vector<int>;
using vb = vector<bool>;
using vs = vector<string>;
using vvi = vector<vi>;
using vp = vector<pii>;
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define sz(x) (int)((x).size())
#define all(x) (x).begin(), (x).end()
#define each(a, x) for (auto&& a : (x))
#define _overload3(_1, _2, _3, name, ...) name
#define rep1(n) rep2(_, n)
#define rep2(i, n) rep3(i, 0, n)
#define rep3(i, a, n) for (int i = (a); i < (n); ++i)
#define rep(...) _overload3(__VA_ARGS__, rep3, rep2, rep1)(__VA_ARGS__)
constexpr int inf = (1 << 30) - 1;
constexpr int mod = 1e9 + 7;
constexpr double eps = 1e-10;
constexpr int dx[] = {1, 0, -1, 0, 1, 1, -1, -1};
constexpr int dy[] = {0, 1, 0, -1, 1, -1, 1, -1};
template<typename T> constexpr void print(const T& t) {cout << t << "\n";}
template<typename T, typename U> constexpr bool chmax(T& a, const U& b) {if (a < b) a = b; return a < b;}
template<typename T, typename U> constexpr bool chmin(T& a, const U& b) {if (a > b) a = b; return a > b;}
template<typename T, typename U> istream& operator>>(istream& is, pair<T, U>& p) {is >> p.fi >> p.se; return is;}
template<typename T, typename U> ostream& operator<<(ostream& os, const pair<T, U>& p) {os << p.fi << " " << p.se; return os;}
template<typename T> istream& operator>>(istream& is, vector<T>& v) {rep(i, sz(v)) is >> v[i]; return is;}
template<typename T> ostream& operator<<(ostream& os, const vector<T>& v) {rep(i, sz(v)) os << v[i] << (i + 1 != sz(v) ? " " : ""); return os;}
struct Init {Init() {cin.tie(nullptr); ios::sync_with_stdio(false); cout << fixed << setprecision(10);}} init;

// 最大公約数
inline int gcd(int a, int b) {
    return b ? gcd(b, a % b) : a;
}

// 素数テーブル　O(NloglogN)
vi eratosthenes(int n) {
    vb primes(n);
    vi D(n);
    rep(i, sz(primes)) primes[i] = true;
    primes[0] = primes[1] = false;
    rep(i, sz(primes) / 2 + 1) {
        if (primes[i]) {
            for (int j = i + i; j < sz(primes); j += i) {
                primes[j] = false;
                D[j] = i;
            }
        }
    }
    return D;
}

// 素因数分解
map<int, int> primeFactorize(int n) {
    map<int, int> prime_factors;
    int m = n;
    rep(i, 2, sqrt(n) + 1) {
        if (m < 1) break;
        while (m % i == 0) {
            ++prime_factors[i];
            m /= i;
        }
    }
    if (m != 1) ++prime_factors[m];
    return prime_factors;
}

int main() {
    int n; cin >> n;
    vi a(n); cin >> a;
    map<int, int> primes;
    set<int> s;
    int ma = -1;
    int g = a[0];
    rep(i, n) {
        g = gcd(g, a[i]);
        chmax(ma, a[i]);
        s.insert(a[i]);
    }
    if (ma == 1) {
        print("pairwise coprime");
        return 0;
    }

    if (g > 1) {
        print("not coprime");
        return 0;
    }

    if (sz(s) >= 80000) {
        print("setwise coprime");
        return 0;
    }

    rep(i, n) {
        auto pf = primeFactorize(a[i]);
        each(x, pf) primes[x.fi]++;
    }
    int ma = -1;
    each(x,primes)
        chmax(ma, x.se);


    if (ma==1) print("pairwise coprime");

    else print("setwise coprime");
}


Compiler output:
a.cc: In function 'int main()':
a.cc:106:9: error: redeclaration of 'int ma'
  106 |     int ma = -1;
      |         ^~
a.cc:80:9: note: 'int ma' previously declared here
   80 |     int ma = -1;
      |         ^~