aboutsummaryrefslogtreecommitdiff
path: root/max_diff_remap_digit.c
diff options
context:
space:
mode:
Diffstat (limited to 'max_diff_remap_digit.c')
-rw-r--r--max_diff_remap_digit.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/max_diff_remap_digit.c b/max_diff_remap_digit.c
new file mode 100644
index 0000000..3eff54a
--- /dev/null
+++ b/max_diff_remap_digit.c
@@ -0,0 +1,30 @@
+// 2566. Maximum Difference by Remapping a Digit
+#include "leetcode.h"
+
+/*
+ * you are given an integer 'num'. you know that bob will sneakily remap one of
+ * the 10 possible digits to another digit. return the difference between the
+ * maximum and minimum values bob can make by remapping exactly one digit in
+ * nums.
+ */
+
+int minMaxDifference(int num) {
+ int min = num, max = num;
+ for (int i = 0; i < 10; ++i) {
+ int low = 0, high = 0, mult = 1;
+ for (int j = num; j; j /= 10) {
+ bool replace = j % 10 == i;
+ low += (replace ? 0 : j % 10) * mult;
+ high += (replace ? 9 : j % 10) * mult;
+ mult *= 10;
+ }
+ min = fmin(min, low);
+ max = fmax(max, high);
+ }
+ return max - min;
+}
+
+int main() {
+ printf("%d\n", minMaxDifference(11891)); // expect: 99009
+ printf("%d\n", minMaxDifference(90)); // expect: 99
+}