diff --git a/du3/output/program.exe b/du3/output/program.exe
new file mode 100644
index 0000000..84d6112
Binary files /dev/null and b/du3/output/program.exe differ
diff --git a/du3/program.c b/du3/program.c
new file mode 100644
index 0000000..ce612d5
--- /dev/null
+++ b/du3/program.c
@@ -0,0 +1,59 @@
+#include <stdio.h>
+#include <math.h>
+#define cislo123 0.01
+
+int main() {
+    char input[100];
+    if (fgets(input, sizeof(input), stdin) == NULL || input[0] == '\n') {
+        return 0;
+    }
+
+    while (fgets(input, sizeof(input), stdin) != NULL && input[0] == '\n') {
+
+    double cislo1;
+    double cislo2;
+    double result;
+    char znak;
+    char rovno;
+    int colznakov = sscanf(input, "%lf %c %lf %c %lf", &cislo1, &znak, &cislo2, &rovno, &result);
+
+    double result2;
+
+    switch (znak)
+    {
+    case '+':
+        result2 = cislo1 + cislo2;
+        break;
+    case '-':
+        result2 = cislo1 - cislo2;
+        break;
+    case '*':
+        result2 = cislo1 * cislo2;
+        break;
+    case '/':
+            if (cislo2 == 0) {
+                printf("Chyba!\n");
+                return 0;
+            }    
+                result2 = cislo1 / cislo2;
+                break;
+            default:
+                printf("CHYBA\n");
+                return 0;
+        }
+
+
+        result2 = round(result2 * 100) / 100;
+
+        if (fabs(result2 - result) < cislo123) {
+            printf("Ok\n");
+        } else {
+            printf("Zle\n");
+        }
+    
+
+
+    
+    }
+    return 0;
+}
\ No newline at end of file
diff --git a/du3/program.exe b/du3/program.exe
new file mode 100644
index 0000000..fd6d94d
Binary files /dev/null and b/du3/program.exe differ