diff --git a/cv5/program.c b/cv5/program.c
index 82a6f55..125acae 100644
--- a/cv5/program.c
+++ b/cv5/program.c
@@ -1,6 +1,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <ctype.h> // Include ctype.h for isdigit function
 
 #define SIZE 100
 
@@ -19,7 +20,7 @@ int compare(const void *a, const void *b) {
     } else if (student_a->votes < student_b->votes) {
         return 1;
     } else {
-        // if the votes are the same, compare names
+        // if votes are the same, compare names
         return strcmp(student_a->name, student_b->name);
     }
 }
@@ -27,6 +28,7 @@ int compare(const void *a, const void *b) {
 int main() {
     struct student students[SIZE];
     int size = 0;
+    int error = 0; // Flag to track if an error occurred
 
     // read student data from standard input
     while (1) {
@@ -36,25 +38,25 @@ int main() {
 
         // check if the line is empty or just contains newline character
         if (r == NULL || (r[0] == '\n' && strlen(r) == 1)) {
-            // end of input
+            // end of input or empty line
+            if (size == 0 && !error) {
+                // If no valid input was processed and no error occurred, print error message and exit
+                fprintf(stderr, "Error: No valid input\n");
+                return 1;
+            }
             break;
         }
 
-        // check if the line was truncated
-        if (strlen(line) == SIZE - 1 && line[SIZE - 2] != '\n') {
-            // line was truncated, handle the error
-            fprintf(stderr, "Error: input line is too long\n");
-            return 1;
-        }
-
         // parse the string and extract number of votes and student name
         int votes;
         char name[SIZE];
-        if (sscanf(line, "%d %[^\n]", &votes, name) != 2) {
-            // error, input was not in expected format
-            // print error message and exit
-            fprintf(stderr, "Error: invalid input format\n");
-            return 1;
+
+        // Use sscanf to parse the input line
+        if (sscanf(line, "%d %[^\n]", &votes, name) != 2 || !isdigit(votes)) {
+            // If sscanf fails to parse the input correctly or votes is not a number
+            // Set error flag and continue to the next line
+            error = 1;
+            continue;
         }
 
         // check if this student already exists