leetcode

commit 28502983118aa4df2e4ce7db1dcf5a69a2f24d21
parent 1beabc3318aefd09d63ea07dd3002be2f92777fd
Author: Jack Sangdahl <jack@pngu.org>
Date:   Sat, 28 Mar 2026 20:39:19 -0600

2839. check if strings can be made equal with operation 1

Diffstat:
A
check_str_eq_op1.c
 | 
28
++++++++++++++++++++++++++++
A
check_str_eq_op1.py
 | 
20
++++++++++++++++++++

2 files changed, 48 insertions(+), 0 deletions(-)
diff --git a/check_str_eq_op1.c b/check_str_eq_op1.c
@@ -0,0 +1,28 @@
+// 2839. Check if Strings Can be Made Equal With Operations I
+#include "leetcode.h"
+
+/*
+ * you are given two strings 's1' and 's2' both of length 4, consisting of
+ * lowercase english letters. you can apply the following operation on any of
+ * the two strings any number of times: choose any two indices 'i' and 'j' such
+ * that 'j - i = 2' then swap the two characters at those indices in the string.
+ * return true if you make the strings 's1' and 's2' equal and false otherwise.
+ */
+
+bool canBeEqual(char *s1, char *s2) {
+  return ((s1[0] == s2[0] && s1[2] == s2[2]) ||
+          (s1[0] == s2[2] && s1[2] == s2[0])) &&
+         ((s1[1] == s2[1] && s1[3] == s2[3]) ||
+          (s1[1] == s2[3] && s1[3] == s2[1]));
+}
+
+int main() {
+  char *s11 = "abcd", *s21 = "cdab";
+  char *s12 = "abcd", *s22 = "dacb";
+  bool r1 = canBeEqual(s11, s21);
+  bool r2 = canBeEqual(s12, s22);
+  printf("%d\n", r1);
+  assert(r1 == true);
+  printf("%d\n", r1);
+  assert(r2 == false);
+}
diff --git a/check_str_eq_op1.py b/check_str_eq_op1.py
@@ -0,0 +1,20 @@
+# 2839. Check if Strings Can be Made Equal With Operations I
+
+"""
+you are given two strings 's1' and 's2' both of length 4, consisting of
+lowercase english letters. you can apply the following operation on any of
+the two strings any number of times: choose any two indices 'i' and 'j' such
+that 'j - i = 2' then swap the two characters at those indices in the string.
+return true if you make the strings 's1' and 's2' equal and false otherwise.
+"""
+
+
+class Solution:
+    def canBeEqual(self, s1: str, s2: str) -> bool:
+        return {s1[0], s1[2]} == {s2[0], s2[2]} and {s1[1], s1[3]} == {s2[1], s2[3]}
+
+
+if __name__ == "__main__":
+    obj = Solution()
+    print(obj.canBeEqual(s1="abcd", s2="cdab"))
+    print(obj.canBeEqual(s1="abcd", s2="dacb"))