Submission #67509892

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Source Code Expand

#pragma GCC optimize ("O3")
#include <bits/stdc++.h>
#define vi vector<int>
#define vll vector<ll>
#define vvi vector<vi>
#define oo 1000000001
#define eb emplace_back
#define pb push_back
#define mpr make_pair
#define ln '\n'
#define ull unsigned long long
#define ll long long
#define all(v) v.begin(), v.end()
#define iospeed ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0)

using namespace std;

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());


template <typename T> void show(vector<T> &v) {
  for (T i : v) {
    cout << i << ' ';
  }
  cout << ln;
}

void solve() {
  int n, l, r;
  cin >> n >> l >> r;
  int res = 0;
  for (int i = 0; i < n; ++i) {
    int x, y;
    cin >> x >> y;
    if (x <= l && y >= r) ++res;
  }
  cout << res << ln;
}
int main() {
  iospeed;
  solve();
  return 0;
}

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