#include <bits/stdc++.h>

using ll                            = long long;
using uint                          = unsigned int;
using ull                           = unsigned long long;
using ld                            = long double;
template<typename T> using max_heap = std::priority_queue<T>;
template<typename T> using min_heap = std::priority_queue<T, std::vector<T>, std::greater<T>>;
constexpr int popcount(const ull v) { return v ? __builtin_popcountll(v) : 0; }
constexpr int log2p1(const ull v) { return v ? 64 - __builtin_clzll(v) : 0; }
constexpr int lsbp1(const ull v) { return __builtin_ffsll(v); }
constexpr int clog(const ull v) { return v ? log2p1(v - 1) : 0; }
constexpr ull ceil2(const ull v) { return 1ULL << clog(v); }
constexpr ull floor2(const ull v) { return v ? (1ULL << (log2p1(v) - 1)) : 0ULL; }
constexpr bool btest(const ull mask, const int ind) { return (mask >> ind) & 1ULL; }
template<typename T> void bset(T& mask, const int ind) { mask |= ((T)1 << ind); }
template<typename T> void breset(T& mask, const int ind) { mask &= ~((T)1 << ind); }
template<typename T> void bflip(T& mask, const int ind) { mask ^= ((T)1 << ind); }
template<typename T> void bset(T& mask, const int ind, const bool b) { (b ? bset(mask, ind) : breset(mask, ind)); }
template<typename T, typename F>
class dualseg
{
public:
    dualseg(const std::vector<T>& vs, F compose_, T id_) : sz{(int)vs.size()}, depth{(int)clog(sz)}, half{1 << depth}, ops(half << 1, id_), compose{compose_}, id{id_} { std::copy(vs.begin(), vs.end(), ops.begin() + half); }
    T get(const int a) const
    {
        assert(0 <= a and a < sz);
        T ans = id;
        for (int i = 0; i <= depth; i++) { ans = compose(ans, ops[(a + half) >> (depth - i)]); }
        return ans;
    }
    void set(int a, const T& f)
    {
        assert(0 <= a and a < sz);
        clean(a += half), clean(a + 1), ops[a] = f;
    }
    void act(int L, int R, const T& f)
    {
        assert(0 <= L and R <= sz);
        if (L >= R) { return; }
        clean(L += half), clean(R += half);
        for (; L < R; L >>= 1, R >>= 1) {
            if (L & 1) { update(L++, f); }
            if (R & 1) { update(--R, f); }
        }
    }
    friend std::ostream& operator<<(std::ostream& os, const dualseg& seg)
    {
        os << "[";
        for (int i = 0; i < seg.sz; i++) { os << seg.get(i) << (i + 1 == seg.sz ? "" : ","); }
        return (os << "]\n");
    }

private:
    void down(const int a) { update(a << 1, ops[a]), update(a << 1 | 1, ops[a]), ops[a] = id; }
    void clean(const int a)
    {
        const int b = (a / (a & -a)) >> 1;
        for (int i = 0; i < depth; i++) {
            const int v = a >> (depth - i);
            if (v > b) { break; }
            down(v);
        }
    }
    void update(const int a, const T& f) { ops[a] = compose(f, ops[a]); }
    const int sz, depth, half;
    std::vector<T> ops;
    F compose;
    T id;
};

template<typename T> constexpr T inf_v      = std::numeric_limits<T>::max() / 4;
template<typename Real> constexpr Real pi_v = Real{3.141592653589793238462643383279502884};
template<typename T> constexpr T TEN(const int n) { return n == 0 ? T{1} : TEN<T>(n - 1) * T{10}; }
const auto min_merge    = [](const auto& x1, const auto& x2) { return std::min(x1, x2); };
const auto max_merge    = [](const auto& x1, const auto& x2) { return std::max(x1, x2); };
const auto minmax_merge = [](const auto& x1, const auto& x2) { return std::decay_t<decltype(x1)>{std::min(x1.first, x2.first), std::max(x1.second, x2.second)}; };
const auto sum_merge    = [](const auto& x1, const auto& x2) { return x1 + x2; };
const auto affine_merge = [](const auto& x1, const auto& x2) { return std::decay_t<decltype(x1)>{x1.first * x2.first, x1.first * x2.second + x1.second}; };

const auto plus_comp   = [](const auto& f1, const auto& f2) { return f1 + f2; };
const auto mult_comp   = [](const auto& f1, const auto& f2) { return f1 * f2; };
const auto assign_comp = [](const auto f1, const auto f2) { return f1 == inf_v<std::decay_t<decltype(f1)>> ? f2 : f1; };
const auto affine_comp = [](const auto& f1, const auto& f2) { return std::decay_t<decltype(f1)>{f1.first * f2.first, f1.first * f2.second + f1.second}; };

const auto min_plus_apply      = [](const auto& f, const auto& x, const auto&) { return x + f; };
const auto max_plus_apply      = [](const auto& f, const auto& x, const auto&) { return x + f; };
const auto minmax_plus_apply   = [](const auto& f, const auto& x, const auto&) { return std::decay_t<decltype(x)>{x.first + f, x.second + f}; };
const auto minmax_mult_apply   = [](const auto& f, const auto& x, const auto&) { return f >= 0 ? std::decay<decltype(x)>{f * x.first, f * x.second} : std::decay_t<decltype(x)>{f * x.second, f * x.first}; };
const auto min_assign_apply    = [](const auto& f, const auto& x, const auto&) { return f == inf_v<std::decay_t<decltype(f)>> ? x : f; };
const auto max_assign_apply    = [](const auto& f, const auto& x, const auto&) { return f == inf_v<std::decay_t<decltype(f)>> ? x : f; };
const auto minmax_assign_apply = [](const auto& f, const auto& x, const auto&) { return f == inf_v<std::decay_t<decltype(f)>> ? x : std::decay_t<decltype(x)>{f, f}; };
const auto minmax_affine_apply = [](const auto& f, const auto x, const auto&) { return f.first >= 0 ? std::decay_t<decltype(x)>{x.first * f.first + f.second, x.second * f.first + f.second} : std::decay_t<decltype(x)>{x.second * f.first + f.second, x.first * f.first + f.second}; };
const auto sum_plus_apply      = [](const auto& f, const auto& x, const auto& l) { return x + f * l; };
const auto sum_mult_apply      = [](const auto& f, const auto& x, const auto&) { return x * f; };
const auto sum_assign_apply    = [](const auto& f, const auto& x, const auto& l) { return f == inf_v<std::decay_t<decltype(f)>> ? x : f * l; };
const auto sum_affine_apply    = [](const auto& f, const auto x, const auto& l) { return x * f.first + f.second * l; };

const auto reverse = [](const auto f) { return [f](const auto& x1, const auto& x2) { return f(x2, x1); }; };

template<typename T> bool chmin(T& a, const T& b) { return (a > b ? a = b, true : false); }
template<typename T> bool chmax(T& a, const T& b) { return (a < b ? a = b, true : false); }
template<typename F> struct fix : F
{
    fix(F&& f) : F{std::forward<F>(f)} {}
    template<typename... Args> auto operator()(Args&&... args) const { return F::operator()(*this, std::forward<Args>(args)...); }
};
template<typename T, int n, int i = 0>
auto nd_array(int const (&szs)[n], const T x = T{})
{
    if constexpr (i == n) {
        return x;
    } else {
        return std::vector(szs[i], nd_array<T, n, i + 1>(szs, x));
    }
}
class printer
{
public:
    printer(std::ostream& os_ = std::cout) : os{os_} { os << std::fixed << std::setprecision(15); }
    template<typename T> int operator()(const T& v) { return os << v, 0; }
    template<typename T> int operator()(const std::vector<T>& vs)
    {
        for (int i = 0; i < (int)vs.size(); i++) { os << (i ? " " : ""), this->operator()(vs[i]); }
        return 0;
    }
    template<typename T> int operator()(const std::vector<std::vector<T>>& vss)
    {
        for (int i = 0; i < (int)vss.size(); i++) { os << (0 <= i or i + 1 < (int)vss.size() ? "\n" : ""), this->operator()(vss[i]); }
        return 0;
    }
    template<typename T, typename... Args> int operator()(const T& v, const Args&... args) { return this->operator()(v), os << ' ', this->operator()(args...), 0; }
    template<typename... Args> int ln(const Args&... args) { return this->operator()(args...), os << '\n', 0; }
    template<typename... Args> int el(const Args&... args) { return this->operator()(args...), os << std::endl, 0; }
    template<typename... Args> int fmt(const std::string& s, const Args&... args) { return rec(s, 0, args...); }

private:
    int rec(const std::string& s, int index) { return os << s.substr(index, s.size()), 0; }
    template<typename T, typename... Args> int rec(const std::string& s, int index, const T& v, const Args&... args) { return index == s.size() ? 0 : s[index] == '%' ? (this->operator()(v), rec(s, index + 1, args...)) : (os << s[index], rec(s, index + 1, v, args...)); }
    std::ostream& os;
};
printer out;
class scanner
{
public:
    scanner(std::istream& is_ = std::cin) : is{is_} { is.tie(nullptr), std::ios::sync_with_stdio(false); }
    template<typename T> T val()
    {
        T v;
        return is >> v, v;
    }
    template<typename T> T val(const T offset) { return val<T>() - offset; }
    template<typename T> std::vector<T> vec(const int n)
    {
        std::vector<T> vs(n);
        for (auto& v : vs) { v = val<T>(); }
        return vs;
    }
    template<typename T> std::vector<T> vec(const int n, const T offset)
    {
        std::vector<T> vs(n);
        for (auto& v : vs) { v = val<T>(offset); }
        return vs;
    }
    template<typename T> std::vector<std::vector<T>> vvec(const int n0, const int n1)
    {
        std::vector<std::vector<T>> vss(n0);
        for (auto& vs : vss) { vs = vec<T>(n1); }
        return vss;
    }
    template<typename T> std::vector<std::vector<T>> vvec(const int n0, const int n1, const T offset)
    {
        std::vector<std::vector<T>> vss(n0);
        for (auto& vs : vss) { vs = vec<T>(n1, offset); }
        return vss;
    }
    template<typename... Args> auto tup() { return std::tuple<std::decay_t<Args>...>{val<Args>()...}; }
    template<typename... Args> auto tup(const Args&... offsets) { return std::tuple<std::decay_t<Args>...>{val<Args>(offsets)...}; }

private:
    std::istream& is;
};
scanner in;
#    define SHOW(...) static_cast<void>(0)
int main()
{
    const auto [N, Q] = in.tup<int, int>();
    auto hseg         = dualseg(std::vector<int>(N, N - 1), assign_comp, inf_v<int>);  // for type 1
    auto vseg         = dualseg(std::vector<int>(N, N - 1), assign_comp, inf_v<int>);  // for type 2
    ll ans            = (ll)(N - 2) * (N - 2);
    for (int q = 0; q < Q; q++) {
        const auto type = in.val<int>();
        if (type == 1) {
            const auto x = in.val<int>(1);
            const int y  = hseg.get(x);
            ans -= (y - 1);
            if (x < vseg.get(y - 1)) { vseg.act(1, y, x); }
        } else {
            const auto y = in.val<int>(1);
            const int x  = vseg.get(y);
            ans -= (x - 1);
            if (y < hseg.get(x - 1)) { hseg.act(1, x, y); }
        }
    }
    out.ln(ans);

    return 0;
}


Measured memory_bytes: 8036