1 files changed, 14 insertions, 0 deletions
diff --git a/progs/a558.py b/progs/a558.py
new file mode 100644
index 0000000..804d9d5
--- /dev/null
+++ b/progs/a558.py
@@ -0,0 +1,14 @@
+def first(arr,x,n): 
+    low = 0
+    high = n - 1
+    res = -1  
+    while (low <= high):
+        mid = (low + high) // 2 
+        if arr[mid] > x:
+            high = mid - 1
+        elif arr[mid] < x:
+            low = mid + 1
+        else:
+            res = mid
+            high = mid - 1
+    return res
+\ No newline at end of file