func_code_string: #include <bits/stdc++.h>   using namespace std;   struct s {     long long x;     long long y;   };   vector<s> v;   bool cmp(s a, s b) {     if (a.x == b.x) return a.y < b.y;     return a.x > b.x;   }   int main() {     long long a, b, c, d, e, i, j, k, xx, yy;     s aa, bb;     scanf( %lld %lld , &a, &b);     for (i = 0; i < a; i++) {       scanf( %lld %lld , &aa.x, &aa.y);       v.push_back(aa);     }     sort(v.begin(), v.end(), cmp);     xx = v[b - 1].x;     yy = v[b - 1].y;     long long count = 0;     for (i = 0; i < a; i++) {       if (xx == v[i].x && yy == v[i].y) {         count++;       }     }     cout << count << endl;     return 0;   }   