diff --git a/cv3/program b/cv3/program
new file mode 100755
index 0000000..5129b56
Binary files /dev/null and b/cv3/program differ
diff --git a/cv3/program.c b/cv3/program.c
new file mode 100644
index 0000000..5654e5b
--- /dev/null
+++ b/cv3/program.c
@@ -0,0 +1,37 @@
+#include<stdio.h>
+#include<stdlib.h>
+
+#define LINE_SIZE 100
+#define STACK_SIZE 100
+
+struct stack{
+	float values[LINE_SIZE];
+	int size;
+}
+
+void print_stack(struct stack* stack){
+	for (int i = 0; i < stack->size; i++){
+		printf("%.0f", stack->values[i]);
+	}
+	printf("\n");
+}
+
+int main(){
+	char input[LINE_SIZE]; float y;
+	memset(&mystack, 0, sizzeof(struct stack));
+
+	while(fgets(input, LINE_SIZE, stdin) != NULL){
+		input[strlen(input - 1)] = '\0';
+		if(sscanf(input, "\f", &y) == 1){
+			printf("Success!\n");
+			assert(mystack.size < STACK_SIZE);
+			mystack.values[mystack.size] = y;
+			mystack.size ++;
+		} esle{
+		  return 1;
+		}
+		print_stack(&mystack);
+	}
+	return 0;
+}
+	
diff --git a/cv4/program.c b/cv4/program.c
new file mode 100644
index 0000000..e69de29