Solve Encryption in c

solutions/beecrowd/1024/1024.c

@@ -0,0 +1,54 @@
+#include <stdio.h>
+#include <stdint.h>
+#include <string.h>
+
+#define MAX_M 1000
+
+void reverse_string(char *string) {
+    char *start = string;
+    char *end = start + strlen(string) - 1;
+    char temp;
+
+    while (start < end) {
+        temp = *start;
+        *start = *end;
+        *end = temp;
+
+        start++;
+        end--;
+    }
+}
+
+int main() {
+    int16_t n;
+    char line[MAX_M];
+    scanf("%d", &n);
+    // hack to force cursor to next line
+    fgets(line, MAX_M, stdin);
+
+    for (uint16_t i = 0; i < n; i++) {
+        fgets(line, MAX_M, stdin);
+
+        size_t line_length = strlen(line);
+        if (line[line_length - 1] == '\n') {
+            line[line_length - 1] = '\0';
+            line_length--;
+        }
+
+        reverse_string(line);
+
+        for (uint16_t j = 0; j < line_length; j++) {
+            if ((line[j] >= 65 && line[j] <= 90) // between A and Z
+                || (line[j] >= 97 && line[j] <= 122)) { // between a and z
+                line[j] = line[j] + 3;
+            }
+            if (j >= line_length / 2) {
+                line[j] = line[j] - 1;
+            }
+        }
+
+        printf("%s\n", line);
+    }
+
+    return 0;
+}