1 files changed, 32 insertions, 0 deletions
diff --git a/src/libs/math.cc b/src/libs/math.cc
new file mode 100644
index 0000000..63487b2
--- /dev/null
+++ b/src/libs/math.cc
@@ -0,0 +1,32 @@
+#include "math.hpp"
+
+int pow(int x, int n) {
+  if (n < 0)
+    return -1;
+  else if (n == 0)
+    return 1;
+  else if (n == 1)
+    return x;
+  int ret = x;
+  for (int i = 0; i < (n - 1); i++)
+    ret *= x;
+  return ret;
+}
+
+int max(int x, int y) {
+  if (x > y)
+    return x;
+  return y;
+}
+
+int min(int x, int y) {
+  if (x < y)
+    return x;
+  return y;
+}
+
+int abs(int x) {
+  if (x < 0)
+    return -x;
+  return x;
+}