func_code_string: #include <bits/stdc++.h>   using namespace std;   double dot(complex<double> a, complex<double> b) {     return (conj(a) * b).real();   }   double cross(complex<double> a, complex<double> b) {     return (conj(a) * b).imag();   }   int main() {     ios::sync_with_stdio(0);     cin.tie(0);     cout.tie(0);     long double x, y, minangle = 600;     int n, s, e;     cin >> n;     vector<pair<long double, int>> v;     for (int i = 1; i <= n; i++) {       cin >> x >> y;       v.push_back({atan2(x, y) * 180.0 / 3.14159265359, i});       while (v.back().first < 0) v.back().first += 360.0;       while (v.back().first > 360.0) v.back().first -= 360.0;     }     sort(v.begin(), v.end());     for (int i = 0; i < v.size(); i++) {       if (min(abs(v[i].first - v[(i + 1) % n].first),               360.0 - abs(v[i].first - v[(i + 1) % n].first)) -               minangle <=           -1e-20) {         minangle = min(abs(v[i].first - v[(i + 1) % n].first),                        360.0 - abs(v[i].first - v[(i + 1) % n].first));         s = v[i].second;         e = v[(i + 1) % n].second;       }     }     cout << s <<     << e;     return 0;   }   