Adding easy puzzles

puzzles/easy/defibrillators.cpp

@@ -0,0 +1,110 @@
+// https://www.codingame.com/ide/puzzle/defibrillators
+// Xavier Morel - 2016-03-07
+
+#include <iostream>
+#include <string>
+#include <vector>
+#include <algorithm>
+
+#define M_PI (3.14159265358979323846)
+
+using namespace std;
+
+typedef struct {
+    double lon;
+    double lat;
+} Coords;
+
+typedef struct {
+    int     id;
+    string  name;
+    string  address;
+    string  phone; // ?
+    Coords  coords;
+} Defib;
+
+void fillDefib(string s, Defib *out)
+{
+    size_t current;
+    size_t next = -1;
+    string tmp;
+
+    current = next + 1;
+    next = s.find_first_of(";", current);
+    out->id = stoi(s.substr(current, next - current));
+
+    current = next + 1;
+    next = s.find_first_of(";", current);
+    out->name = s.substr(current, next - current);
+
+    current = next + 1;
+    next = s.find_first_of(";", current);
+    out->address = s.substr(current, next - current);
+
+    current = next + 1;
+    next = s.find_first_of(";", current);
+    out->phone = s.substr(current, next - current);
+
+    current = next + 1;
+    next = s.find_first_of(";", current);
+    tmp = s.substr(current, next - current);
+    replace(tmp.begin(), tmp.end(), ',', '.');
+    out->coords.lon = stod(tmp);
+
+    current = next + 1;
+    next = s.find_first_of(";", current);
+    tmp = s.substr(current, next - current);
+    replace(tmp.begin(), tmp.end(), ',', '.');
+    out->coords.lat = stod(tmp);
+}
+
+double calcDist(Coords from, Coords to)
+{
+    double fLon = from.lon * M_PI / 180;
+    double fLat = from.lat * M_PI / 180;
+    double tLon = to.lon * M_PI / 180;
+    double tLat = to.lat * M_PI / 180;
+
+    double x = (tLon - fLon) * cos((tLat + fLat) / 2);
+    double y = (tLat - fLat);
+    double res = (sqrt((x*x) + (y*y)) * 6371);
+
+    return res;
+}
+
+/**
+ * Auto-generated code below aims at helping you parse
+ * the standard input according to the problem statement.
+ **/
+int main()
+{
+    string  tmp;
+    Coords  userCoords;
+
+    cin >> tmp; cin.ignore();
+    replace(tmp.begin(), tmp.end(), ',', '.');
+    userCoords.lon = stod(tmp);
+    cin >> tmp; cin.ignore();
+    replace(tmp.begin(), tmp.end(), ',', '.');
+    userCoords.lat = stod(tmp);
+
+    int N;
+    cin >> N; cin.ignore();
+
+    int nearest = -1;
+    double nearest_dist = 0;
+
+    Defib defibs[N];
+    for (int i = 0; i < N; i++) {
+        string DEFIB;
+        getline(cin, DEFIB);
+        fillDefib(DEFIB, &defibs[i]);
+        double dist = calcDist(userCoords, defibs[i].coords);
+        if (nearest < 0 || nearest_dist > dist) {
+            nearest = i;
+            nearest_dist = dist;
+        }
+    }
+
+    cout << defibs[nearest].name << endl;
+}