Add files via upload

Author: MathProgrammer

C Programs/C Programs 23/Ice Skater.cpp

@@ -0,0 +1,58 @@
+#include <cstdio>
+#include <vector>
+
+using namespace std;
+
+const int MAX_N = 105;
+vector <int> visited(MAX_N, false);
+vector <int> graph[MAX_N];
+
+void dfs(int v)
+{
+    visited[v] = true;
+
+    for(int i = 0; i < graph[v].size(); i++)
+    {
+        int child = graph[v][i];
+
+        if(!visited[child])
+            dfs(child);
+    }
+}
+
+int main()
+{
+    int no_of_points;
+    scanf("%d", &no_of_points);
+
+    vector <int> X(no_of_points + 1);
+    vector <int> Y(no_of_points + 1);
+    for(int i = 1; i <= no_of_points; i++)
+        scanf("%d %d", &X[i], &Y[i]);
+
+    int no_of_components = 0;
+    for(int i = 1; i <= no_of_points; i++)
+    {
+        for(int j = 1; j < i; j++)
+        {
+            if(X[i] == X[j] || Y[i] == Y[j])
+            {
+                graph[i].push_back(j);
+                graph[j].push_back(i);
+            }
+        }
+    }
+
+    for(int i = 1; i <= no_of_points; i++)
+    {
+        if(!visited[i])
+        {
+            no_of_components++;
+
+            dfs(i);
+        }
+    }
+
+    printf("%d\n", no_of_components - 1);
+    return 0;
+}