fix: clang-format for dijkstra (#1055)

graph/dijkstra.cpp

@@ -26,10 +26,10 @@
 #include <cassert>
 #include <iostream>
 #include <limits>
+#include <memory>
 #include <queue>
 #include <utility>
 #include <vector>
-#include <memory>
 
 constexpr int64_t INF = std::numeric_limits<int64_t>::max();
 
@@ -39,31 +39,31 @@ constexpr int64_t INF = std::numeric_limits<int64_t>::max();
  */
 
 namespace graph {
-  /**
-   * @brief Function that add edge between two nodes or vertices of graph
-   *
-   * @param u any node or vertex of graph
-   * @param v any node or vertex of graph
-   */
-  void addEdge(std::vector<std::vector<std::pair<int, int>>> *adj, int u, int v,
-      int w) {
+/**
+ * @brief Function that add edge between two nodes or vertices of graph
+ *
+ * @param u any node or vertex of graph
+ * @param v any node or vertex of graph
+ */
+void addEdge(std::vector<std::vector<std::pair<int, int>>> *adj, int u, int v,
+             int w) {
     (*adj)[u - 1].push_back(std::make_pair(v - 1, w));
     // (*adj)[v - 1].push_back(std::make_pair(u - 1, w));
-  }
-
-  /**
-   * @brief Function runs the dijkstra algorithm for some source vertex and
-   * target vertex in the graph and returns the shortest distance of target
-   * from the source.
-   *
-   * @param adj input graph
-   * @param s source vertex
-   * @param t target vertex
-   *
-   * @return shortest distance if target is reachable from source else -1 in
-   * case if target is not reachable from source.
-   */
-  int dijkstra(std::vector<std::vector<std::pair<int, int>>> *adj, int s, int t) {
+}
+
+/**
+ * @brief Function runs the dijkstra algorithm for some source vertex and
+ * target vertex in the graph and returns the shortest distance of target
+ * from the source.
+ *
+ * @param adj input graph
+ * @param s source vertex
+ * @param t target vertex
+ *
+ * @return shortest distance if target is reachable from source else -1 in
+ * case if target is not reachable from source.
+ */
+int dijkstra(std::vector<std::vector<std::pair<int, int>>> *adj, int s, int t) {
     /// n denotes the number of vertices in graph
     int n = adj->size();
 
@@ -74,7 +74,7 @@ namespace graph {
     /// first element of pair contains the distance
     /// second element of pair contains the vertex
     std::priority_queue<std::pair<int, int>, std::vector<std::pair<int, int>>,
-      std::greater<std::pair<int, int>>>
+                        std::greater<std::pair<int, int>>>
         pq;
 
     /// pushing the source vertex 's' with 0 distance in min heap
@@ -84,97 +84,97 @@ namespace graph {
     dist[s] = 0;
 
     while (!pq.empty()) {
-      /// second element of pair denotes the node / vertex
-      int currentNode = pq.top().second;
-
-      /// first element of pair denotes the distance
-      int currentDist = pq.top().first;
-
-      pq.pop();
-
-      /// for all the reachable vertex from the currently exploring vertex
-      /// we will try to minimize the distance
-      for (std::pair<int, int> edge : (*adj)[currentNode]) {
-        /// minimizing distances
-        if (currentDist + edge.second < dist[edge.first]) {
-          dist[edge.first] = currentDist + edge.second;
-          pq.push(std::make_pair(dist[edge.first], edge.first));
+        /// second element of pair denotes the node / vertex
+        int currentNode = pq.top().second;
+
+        /// first element of pair denotes the distance
+        int currentDist = pq.top().first;
+
+        pq.pop();
+
+        /// for all the reachable vertex from the currently exploring vertex
+        /// we will try to minimize the distance
+        for (std::pair<int, int> edge : (*adj)[currentNode]) {
+            /// minimizing distances
+            if (currentDist + edge.second < dist[edge.first]) {
+                dist[edge.first] = currentDist + edge.second;
+                pq.push(std::make_pair(dist[edge.first], edge.first));
+            }
         }
-      }
     }
     if (dist[t] != INF) {
-      return dist[t];
+        return dist[t];
     }
     return -1;
-  }
+}
 }  // namespace graph
 
 /** Function to test the Algorithm */
 void tests() {
-  std::cout << "Initiatinig Predefined Tests..." << std::endl;
-  std::cout << "Initiating Test 1..." << std::endl;
-  std::vector<std::vector<std::pair<int, int>>> adj1(
-      4, std::vector<std::pair<int, int>>());
-  graph::addEdge(&adj1, 1, 2, 1);
-  graph::addEdge(&adj1, 4, 1, 2);
-  graph::addEdge(&adj1, 2, 3, 2);
-  graph::addEdge(&adj1, 1, 3, 5);
-
-  int s = 1, t = 3;
-  assert(graph::dijkstra(&adj1, s - 1, t - 1) == 3);
-  std::cout << "Test 1 Passed..." << std::endl;
-
-  s = 4, t = 3;
-  std::cout << "Initiating Test 2..." << std::endl;
-  assert(graph::dijkstra(&adj1, s - 1, t - 1) == 5);
-  std::cout << "Test 2 Passed..." << std::endl;
-
-  std::vector<std::vector<std::pair<int, int>>> adj2(
-      5, std::vector<std::pair<int, int>>());
-  graph::addEdge(&adj2, 1, 2, 4);
-  graph::addEdge(&adj2, 1, 3, 2);
-  graph::addEdge(&adj2, 2, 3, 2);
-  graph::addEdge(&adj2, 3, 2, 1);
-  graph::addEdge(&adj2, 2, 4, 2);
-  graph::addEdge(&adj2, 3, 5, 4);
-  graph::addEdge(&adj2, 5, 4, 1);
-  graph::addEdge(&adj2, 2, 5, 3);
-  graph::addEdge(&adj2, 3, 4, 4);
-
-  s = 1, t = 5;
-  std::cout << "Initiating Test 3..." << std::endl;
-  assert(graph::dijkstra(&adj2, s - 1, t - 1) == 6);
-  std::cout << "Test 3 Passed..." << std::endl;
-  std::cout << "All Test Passed..." << std::endl << std::endl;
+    std::cout << "Initiatinig Predefined Tests..." << std::endl;
+    std::cout << "Initiating Test 1..." << std::endl;
+    std::vector<std::vector<std::pair<int, int>>> adj1(
+        4, std::vector<std::pair<int, int>>());
+    graph::addEdge(&adj1, 1, 2, 1);
+    graph::addEdge(&adj1, 4, 1, 2);
+    graph::addEdge(&adj1, 2, 3, 2);
+    graph::addEdge(&adj1, 1, 3, 5);
+
+    int s = 1, t = 3;
+    assert(graph::dijkstra(&adj1, s - 1, t - 1) == 3);
+    std::cout << "Test 1 Passed..." << std::endl;
+
+    s = 4, t = 3;
+    std::cout << "Initiating Test 2..." << std::endl;
+    assert(graph::dijkstra(&adj1, s - 1, t - 1) == 5);
+    std::cout << "Test 2 Passed..." << std::endl;
+
+    std::vector<std::vector<std::pair<int, int>>> adj2(
+        5, std::vector<std::pair<int, int>>());
+    graph::addEdge(&adj2, 1, 2, 4);
+    graph::addEdge(&adj2, 1, 3, 2);
+    graph::addEdge(&adj2, 2, 3, 2);
+    graph::addEdge(&adj2, 3, 2, 1);
+    graph::addEdge(&adj2, 2, 4, 2);
+    graph::addEdge(&adj2, 3, 5, 4);
+    graph::addEdge(&adj2, 5, 4, 1);
+    graph::addEdge(&adj2, 2, 5, 3);
+    graph::addEdge(&adj2, 3, 4, 4);
+
+    s = 1, t = 5;
+    std::cout << "Initiating Test 3..." << std::endl;
+    assert(graph::dijkstra(&adj2, s - 1, t - 1) == 6);
+    std::cout << "Test 3 Passed..." << std::endl;
+    std::cout << "All Test Passed..." << std::endl << std::endl;
 }
 
 /** Main function */
 int main() {
-  // running predefined tests
-  tests();
-
-  int vertices = int(), edges = int();
-  std::cout << "Enter the number of vertices : ";
-  std::cin >> vertices;
-  std::cout << "Enter the number of edges : ";
-  std::cin >> edges;
-
-  std::vector<std::vector<std::pair<int, int>>> adj(
-      vertices, std::vector<std::pair<int, int>>());
-
-  int u = int(), v = int(), w = int();
-  while (edges--) {
-    std::cin >> u >> v >> w;
-    graph::addEdge(&adj, u, v, w);
-  }
-
-  int s = int(), t = int();
-  std::cin >> s >> t;
-  int dist = graph::dijkstra(&adj, s - 1, t - 1);
-  if (dist == -1) {
-    std::cout << "Target not reachable from source" << std::endl;
-  } else {
-    std::cout << "Shortest Path Distance : " << dist << std::endl;
-  }
-  return 0;
+    // running predefined tests
+    tests();
+
+    int vertices = int(), edges = int();
+    std::cout << "Enter the number of vertices : ";
+    std::cin >> vertices;
+    std::cout << "Enter the number of edges : ";
+    std::cin >> edges;
+
+    std::vector<std::vector<std::pair<int, int>>> adj(
+        vertices, std::vector<std::pair<int, int>>());
+
+    int u = int(), v = int(), w = int();
+    while (edges--) {
+        std::cin >> u >> v >> w;
+        graph::addEdge(&adj, u, v, w);
+    }
+
+    int s = int(), t = int();
+    std::cin >> s >> t;
+    int dist = graph::dijkstra(&adj, s - 1, t - 1);
+    if (dist == -1) {
+        std::cout << "Target not reachable from source" << std::endl;
+    } else {
+        std::cout << "Shortest Path Distance : " << dist << std::endl;
+    }
+    return 0;
 }