#include "bits/stdc++.h"
#pragma GCC optimize("Ofast")

// Begin Header {{{
using namespace std;

#ifndef DEBUG
#define dump(...)
#endif

#define all(x) x.begin(), x.end()
#define rep(i, n) for (intmax_t i = 0, i##_limit = (n); i < i##_limit; ++i)
#define reps(i, b, e) for (intmax_t i = (b), i##_limit = (e); i <= i##_limit; ++i)
#define repr(i, b, e) for (intmax_t i = (b), i##_limit = (e); i >= i##_limit; --i)
#define var(Type, ...) Type __VA_ARGS__; input(__VA_ARGS__)

constexpr size_t    operator""_zu(unsigned long long value) { return value; };
constexpr intmax_t  operator""_jd(unsigned long long value) { return value; };
constexpr uintmax_t operator""_ju(unsigned long long value) { return value; };

constexpr int INF = 0x3f3f3f3f;
constexpr intmax_t LINF = 0x3f3f3f3f3f3f3f3f_jd;

template <class T>
using MaxHeap = priority_queue<T, vector<T>, less<T>>;
template <class T>
using MinHeap = priority_queue<T, vector<T>, greater<T>>;

inline void input() {}
template <class Head, class... Tail>
inline void input(Head&& head, Tail&&... tail) {
    cin >> head;
    input(forward<Tail>(tail)...);
}

template <class T>
inline void input(vector<T> &vec) {
    for (auto &e: vec) {
        cin >> e;
    }
}

template <class T>
inline void input(vector<vector<T>> &mat) {
    for (auto &vec: mat) {
        input(vec);
    }
}

inline void print() { cout << "\n"; }
template <class Head, class... Tail>
inline void print(Head&& head, Tail&&... tail) {
    cout << head;
    if (sizeof...(tail)) {
        cout << ' ';
    }
    print(forward<Tail>(tail)...);
}

template <class T>
inline ostream& operator<<(ostream &strm, const vector<T> &vec) {
    static constexpr const char *delim[] = {" ", ""};
    for (const auto &e: vec) {
        strm << e << delim[&e == &vec.back()];
    }
    return strm;
}

template <class T>
inline vector<T> make_v(const T &initValue, size_t sz) {
    return vector<T>(sz, initValue);
}

template <class T, class... Args>
inline auto make_v(const T &initValue, size_t sz, Args... args) {
    return vector<decltype(make_v<T>(initValue, args...))>(sz, make_v<T>(initValue, args...));
}

template <class Func>
class FixPoint : Func {
public:
    explicit constexpr FixPoint(Func&& f) noexcept : Func(forward<Func>(f)) {}

    template <class... Args>
    constexpr decltype(auto) operator()(Args&&... args) const {
        return Func::operator()(*this, std::forward<Args>(args)...);
    }
};

template <class Func>
static inline constexpr decltype(auto) makeFixPoint(Func&& f) noexcept {
    return FixPoint<Func>{forward<Func>(f)};
}

template <class T>
inline bool chmax(T &a, const T &b) noexcept {
    return b > a && (a = b, true);
}

template <class T>
inline bool chmin(T &a, const T &b) noexcept {
    return b < a && (a = b, true);
}

template <class T>
inline T diff(const T &a, const T &b) noexcept {
    return a < b ? b - a : a - b;
}
// }}}

// CumulativeSum2D {{{
class CumulativeSum2D {
    vector<vector<intmax_t>> cum;

public:
    CumulativeSum2D() {}
    CumulativeSum2D(const size_t h, const size_t w) : cum(h + 1, vector<intmax_t>(w + 1)) {}

    inline void build() {
        const size_t h = cum.size(), w = cum[0].size();
        for (size_t y = 1; y < h; ++y) {
            for (size_t x = 1; x < w; ++x) {
                cum[y][x] += cum[y][x - 1] + cum[y - 1][x] - cum[y - 1][x - 1];
            }
        }
    }

    inline intmax_t sum(size_t sy, size_t sx, size_t gy, size_t gx) const {
        return cum[gy][gx] - cum[sy - 1][gx] - cum[gy][sx - 1] + cum[sy - 1][sx - 1];
    }

    inline vector<intmax_t> operator[](size_t y) const {
        return cum[y];
    }

    inline vector<intmax_t>& operator[](size_t y) {
        return cum[y];
    }

    inline void assign(const size_t h, const size_t w) {
        cum.assign(h + 1, vector<intmax_t>(w + 1));
    }

    inline size_t height() const noexcept {
        return cum.size() - 1;
    }

    inline size_t width() const noexcept {
        return cum[0].size() - 1;
    }

    inline const auto& data() const noexcept {
        return cum;
    }
};
// }}}

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

    var(size_t, N, M, Q);

    CumulativeSum2D cum(N, N);
    rep(i, M) {
        var(size_t, L, R);
        cum[L][R]++;
    }

    cum.build();

    while (Q--) {
        var(size_t, L, R);
        print(cum.sum(L, L, R, R));
    }

    return 0;
}


Measured memory_bytes: 2944