diff --git a/a1/program.c b/a1/program.c
index e69de29..a18dcf3 100644
--- a/a1/program.c
+++ b/a1/program.c
@@ -0,0 +1,54 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+
+#define MAX_LINE_LENGTH 100
+
+int main() {
+  char uloha[MAX_LINE_LENGTH];
+
+  while (fgets(uloha, MAX_LINE_LENGTH, stdin) != NULL) {
+
+    int cislo1, cislo2, vysledok_zadany;
+    char operacia;
+
+
+    if (sscanf(uloha, "%d %c %d = %d", &cislo1, &operacia, &cislo2, &vysledok_zadany) != 4) {
+      printf("CHYBA\n");
+      continue;
+    }
+
+    double vysledok_skutocny;
+
+
+    switch (operacia) {
+      case '+':
+        vysledok_skutocny = cislo1 + cislo2;
+        break;
+      case '-':
+        vysledok_skutocny = cislo1 - cislo2;
+        break;
+      case '*':
+        vysledok_skutocny = cislo1 * cislo2;
+        break;
+      case '/':
+        if (cislo2 == 0) {
+          printf("CHYBA\n");
+          continue;
+        }
+        vysledok_skutocny = (double)cislo1 / cislo2;
+        break;
+      default:
+        printf("CHYBA\n");
+        continue;
+    }
+
+    if (fabs(vysledok_skutocny - round(vysledok_skutocny * 100) / 100.0) < 1e-6 && vysledok_zadany == round(vysledok_skutocny * 100) / 100.0) {
+      printf("OK\n");
+    } else {
+      printf("ZLE\n");
+    }
+  }
+
+  return 0;
+}
\ No newline at end of file