func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n;     cin >> n;     if (n <= 4)       cout <<  No solution  << endl;     else {       double alpha = 2 * M_PI / n;       cout << fixed << setprecision(6);       double x = 0, y = 0;       for (int i = 1; i <= n - 2; i++) {         cout << x <<     << y << endl;         double l = 500;         l += 0.01 * i;         x += l * cos(alpha * i), y += l * sin(alpha * i);       }       cout << x <<     << y << endl;       x -= y / sin(alpha * (n - 1)) * cos(alpha * (n - 1)), y = 0;       cout << x <<     << y << endl;     }     return 0;   }   