diff --git a/pure-c-test/20220428/test-4-3.c b/pure-c-test/20220428/test-4-3.c
new file mode 100644
index 0000000..c0385a9
--- /dev/null
+++ b/pure-c-test/20220428/test-4-3.c
@@ -0,0 +1,22 @@
+#include <stdio.h>
+
+int main() {
+    int candidates[5] = {0};
+    int vote = 0, invalidVoteCount = 0;
+
+    do {
+        scanf("%d", &vote);
+        if (vote >= 1 && vote <= 5) {
+            candidates[vote - 1]++;
+        } else if (vote != -1) {
+            invalidVoteCount++;
+            continue;
+        }
+    } while (vote != -1);
+
+    for (int i:candidates) {
+        printf("%d ",i);
+    }
+    
+    printf("\n%d", invalidVoteCount);
+}
diff --git a/pure-c-test/20220428/test-4-9.c b/pure-c-test/20220428/test-4-9.c
new file mode 100644
index 0000000..e69de29