func_code_string: #include <bits/stdc++.h>   using namespace std;   int gcd(int x, int y) {     if (x == 0)       return y;     else       return gcd(y % x, x);   }   bool sortbysec(const pair<int, int> &a, const pair<int, int> &b) {     return (a.second < b.second);   }   bool sortbysize(string &s1, string &s2) { return s1.size() < s2.size(); }   bool sortinrev(const pair<int, int> &a, const pair<int, int> &b) {     return (a.first > b.first);   }   int main() {     ios_base::sync_with_stdio(false);     cin.tie(0);     cout.tie(0);     ;     int n, k, a, b, i, x, cnt = 0;     cin >> n >> k;     vector<pair<int, int>> v;     map<int, int> mp;     while (n--) {       cin >> a >> b;       v.push_back(make_pair(a, b));       mp[a]++;     }     sort(v.begin(), v.end(), sortinrev);     for (i = 0; i < v.size();) {       if (mp[v[i].first] > 1) {         sort(v.begin() + i, v.begin() + i + mp[v[i].first], sortbysec);       }       i += mp[v[i].first];     }     for (i = 0; i < v.size(); i++) {       if (v[i].second == v[k - 1].second && v[i].first == v[k - 1].first) cnt++;     }     cout << cnt << endl;     return 0;   }   