Use -O1 option for makefile

Signed-off-by: begeekmyfriend <begeekmyfriend@gmail.com>

Author: begeekmyfriend

001_two_sum/Makefile

@@ -1,2 +1,2 @@
 all:
-	gcc -O2 -o test two_sum.c
+	gcc -O1 -o test two_sum.c

002_add_two_numbers/Makefile

@@ -1,2 +1,2 @@
 all:
-	gcc -O2 -o test add_two_numbers.c
+	gcc -O1 -o test add_two_numbers.c

003_longest_substring_without_repeat/Makefile

@@ -1,2 +1,2 @@
 all:
-	gcc -O2 -o test longest_substring_without_repeat.c
+	gcc -O1 -o test longest_substring_without_repeat.c

004_median_of_two_sorted_array/Makefile

@@ -1,2 +1,2 @@
 all:
-	gcc -O2 -o test median_of_two_sorted_array.c
+	gcc -O1 -o test median_of_two_sorted_array.c

005_longest_palindromic_substring/Makefile

@@ -1,2 +1,2 @@
 all:
-	gcc -O2 -o test longest_palindromic_substring.c
+	gcc -O1 -o test longest_palindromic_substring.c

006_zigzag_conversion/Makefile

@@ -1,2 +1,2 @@
 all:
-	gcc -O2 -o test zigzag_conversion.c
+	gcc -O1 -o test zigzag_conversion.c

007_reverse_integer/Makefile

@@ -1,2 +1,2 @@
 all:
-	gcc -O2 -o test reverse_integer.c
+	gcc -O1 -o test reverse_integer.c

008_atoi/Makefile

@@ -1,2 +1,2 @@
 all:
-	gcc -O2 -o test atoi.c
+	gcc -O1 -o test atoi.c

009_palindrome_number/Makefile

@@ -1,2 +1,2 @@
 all:
-	gcc -O2 -o test palindrome_number.c
+	gcc -O1 -o test palindrome_number.c

010_regular_expression_matching/Makefile

@@ -1,2 +1,2 @@
 all:
-	gcc -O2 -o test regular_expression.c
+	gcc -O1 -o test regular_expression.c