Add kattis prob parking2 in C

kattis/parking2/solution.c

@@ -0,0 +1,26 @@
+#include <stdio.h>
+
+int main() {
+    int num_tests;
+    scanf("%d", &num_tests);
+    int t;
+    for (t = 0; t < num_tests; ++t) {
+        int n;
+        scanf("%d", &n);
+        unsigned int min = -1;
+        int max = 0;
+        int i;
+        for (i = 0; i < n; ++i) {
+            int x;
+            scanf("%d", &x);
+            if (x < min) {
+                min = x;
+            }
+            if (x > max) {
+                max = x;
+            }
+        }
+        printf("%d\n", 2*(max-min));
+    }
+    return 0;
+}