[C++] Template for Competitive Programming

template.cpp

#ifdef LOCAL
    #define _FORTIFY_SOURCE 2
    #define _GLIBCXX_DEBUG_PEDANTIC
    #define _GLIBCXX_DEBUG
    #define debug(x)                                      \
        std::cerr << std::boolalpha << "\x1b[33m[DEBUG] " \
                  << #x" = " << x << "\x1b[0m\n"
#else
    #define NDEBUG    1
    #define debug(x)  1
#endif

// #pragma GCC target ("avx,avx2")
// #pragma GCC optimize ("Ofast")

#include <bits/stdc++.h>

using i16 = short;
using i64 = long long;
using f32 = float;
using f64 = double;

using vi32 = std::vector<int>;
using mi32 = std::vector<vi32>;
using pi32 = std::pair<int, int>;

// using ui128 = __uint128_t;
// using i128 = __int128_t;
// using f128 = long double;

#define rep(i, a, b)   for (int i = a; i <= b; i++)
#define irep(i, a, b)  for (int i = a; i >= b; i--)

#define all(v)  (v).begin(), (v).end()
#define rall(v) (v).rbegin(), (v).rend()
#define sz(v)   (v).size()

#define pb push_back
#define eb emplace_back
#define ef emplace_front
#define pf push_front

constexpr int INF = INT_MAX;
constexpr int MOD = (int)(1e9) + 7;

constexpr f64 EPS = 1e-9;
constexpr f64 PI  = 3.14159265358979323846;

template <class T1, class T2>
std::ostream &operator <<(std::ostream &out, const std::pair<T1, T2> &p) {
    out << '(' << p.first << ", " << p.second << ')';
    return out;
}

template <template <class...> class Container, class... T>
std::ostream &operator <<(std::ostream &out, const Container<T...> &cont) {
    for(auto i: cont) { out << i << ' '; }
    return out;
}

int main() {
    std::ios_base::sync_with_stdio(false);
    std::cin.tie(nullptr);

    // std::cout.setf(ios::fixed);
    // std::cout.precision(12);

    // std::freopen("input.in", "r", stdin);
    // std::freopen("output.out", "w", stdout);

    return 0;
}