func_code_string: #include <bits/stdc++.h>   using namespace std;   const int modu = 1e9 + 7;   long long int mod(long long int n) { return (n % modu); }   bool cmp(long long int a, long long int b) { return a > b; }   int main() {     ios_base::sync_with_stdio(false);     cin.tie(0);     cout.tie(0);     long long int N, a, b, c, d, x = 0;     pair<int, int> P[205], s;     cin >> N;     for (int i = 0; i < N; i++) {       cin >> P[i].first >> P[i].second;     }     for (int i = 0; i < N; i++) {       a = b = c = d = 0;       s.first = P[i].first;       s.second = P[i].second;       for (int j = 0; j < N; j++) {         if (i != j) {           if (P[j].first > s.first && P[j].second == s.second)             a = 1;           else if (P[j].first < s.first && P[j].second == s.second)             b = 1;           else if (P[j].first == s.first && P[j].second > s.second)             c = 1;           else if (P[j].first == s.first && P[j].second < s.second)             d = 1;         }       }       if (a == 1 && b == 1 && c == 1 && d == 1) x++;     }     cout << x;     return 0;   }   