diff --git a/src/classes/disjoint_set/disjoint_set.h b/src/classes/disjoint_set/disjoint_set.h
index a5c4d2ed..cdd7d524 100644
--- a/src/classes/disjoint_set/disjoint_set.h
+++ b/src/classes/disjoint_set/disjoint_set.h
@@ -3,6 +3,7 @@
 
 #ifdef __cplusplus
 #include <vector>
+#include <cstdint>
 #endif
 
 /**
diff --git a/src/classes/heap/min_heap.h b/src/classes/heap/min_heap.h
index c697f6f6..0e85c59f 100644
--- a/src/classes/heap/min_heap.h
+++ b/src/classes/heap/min_heap.h
@@ -3,6 +3,7 @@
 #ifdef __cplusplus
 #include <functional>
 #include <iostream>
+#include <cstdint>
 #include <vector>
 #endif
 
diff --git a/src/classes/tree/tree.h b/src/classes/tree/tree.h
index ba4231a2..cc3d31ec 100644
--- a/src/classes/tree/tree.h
+++ b/src/classes/tree/tree.h
@@ -6,6 +6,7 @@
 #include <functional>
 #include <iostream>
 #include <queue>
+#include <memory>
 #endif
 
 /**
diff --git a/src/machine_learning/image/edge_detection/prewitt.h b/src/machine_learning/image/edge_detection/prewitt.h
index 326946a0..db5cf921 100644
--- a/src/machine_learning/image/edge_detection/prewitt.h
+++ b/src/machine_learning/image/edge_detection/prewitt.h
@@ -4,6 +4,7 @@
 #ifdef __cplusplus
 #include <iostream>
 #include <vector>
+#include <cmath>
 #include "../image.h"
 #endif
 
diff --git a/src/machine_learning/image/filters/median_filter.h b/src/machine_learning/image/filters/median_filter.h
index 09328100..559273e0 100644
--- a/src/machine_learning/image/filters/median_filter.h
+++ b/src/machine_learning/image/filters/median_filter.h
@@ -4,6 +4,7 @@
 #ifdef __cplusplus
 #include <iostream>
 #include <vector>
+#include <algorithm>
 #include "../image.h"
 #endif
 
diff --git a/src/machine_learning/regression/linear_regression/lin_reg.h b/src/machine_learning/regression/linear_regression/lin_reg.h
index 47cc4d82..ef05056e 100644
--- a/src/machine_learning/regression/linear_regression/lin_reg.h
+++ b/src/machine_learning/regression/linear_regression/lin_reg.h
@@ -5,6 +5,7 @@
 #ifdef __cplusplus
 #include <iostream>
 #include <vector>
+#include <cmath>
 #endif
 
 
diff --git a/src/machine_learning/regression/polynomial_regression/poly_reg.h b/src/machine_learning/regression/polynomial_regression/poly_reg.h
index 9264e6b0..fc897309 100644
--- a/src/machine_learning/regression/polynomial_regression/poly_reg.h
+++ b/src/machine_learning/regression/polynomial_regression/poly_reg.h
@@ -58,7 +58,7 @@ class polynomial_regression{
 
       int64_t maxRow = i;
       for (int64_t k = i + 1; k < n; ++k) {
-        if (abs(A[k][i]) > abs(A[maxRow][i])) {
+        if (std::abs(A[k][i]) > std::abs(A[maxRow][i])) {
           maxRow = k;
         }
       }
diff --git a/src/machine_learning/search_algorithms/AStar/astar.h b/src/machine_learning/search_algorithms/AStar/astar.h
index 15472299..8d91e402 100644
--- a/src/machine_learning/search_algorithms/AStar/astar.h
+++ b/src/machine_learning/search_algorithms/AStar/astar.h
@@ -9,6 +9,7 @@
 #include <vector>
 #include <queue>
 #include <climits>
+#include <algorithm>
 #endif
 
 
diff --git a/src/machine_learning/search_algorithms/hill_climbing/hill_climbing.h b/src/machine_learning/search_algorithms/hill_climbing/hill_climbing.h
index 32bf59bc..f890acf8 100644
--- a/src/machine_learning/search_algorithms/hill_climbing/hill_climbing.h
+++ b/src/machine_learning/search_algorithms/hill_climbing/hill_climbing.h
@@ -6,6 +6,7 @@
 #include <unordered_map>
 #include <queue>
 #include <climits>
+#include <limits>
 #endif
 
 /**