func_code_string: #include <bits/stdc++.h>   using namespace std;   void start() {}   vector<long int> g[200007];   map<long int, bool> vis;   long int siz = 0;   void dfs(long int x) {     vis[x] = 1;     siz++;     for (auto i : g[x]) {       if (!vis[i]) {         dfs(i);       }     }     return;   }   double dist(long int x, long int y, long int a, long int b) {     double ans = sqrt((a - x) * (a - x) + (b - y) * (b - y));     return ans;   }   void sober() {     double r, x, y, x1, y1;     cin >> r >> x >> y >> x1 >> y1;     double ans = sqrt((x - x1) * (x - x1) + (y - y1) * (y - y1));     ans = ans / (2 * r);     cout << ceil(ans) <<   n ;   }   signed main() {     start();     ios::sync_with_stdio(0);     cin.tie(0);     cout.tie(0);     long int t = 1;     while (t--) {       sober();     }   }   