diff --git a/program.c b/program.c
index 8b13789..116684d 100644
--- a/program.c
+++ b/program.c
@@ -1 +1,55 @@
+#include <stdio.h>
+#include <time.h>
+
+int main()
+{
+	int y, m, d;
+	scanf("%d.%d.%d", &d, &m, &y);
+    if(y>=0 && y<=9999)
+    {
+        //check month
+        if(m>=1 && m<=12)
+        {
+            //check days
+            if((d>=1 && d<=31) && (m==1 || m==3 || m==5 || m==7 || m==8 || m==10 || m==12))
+            {}
+            else if((d>=1 && d<=30) && m==4 || m==6 || m==9 || m==11)
+            {}
+            else if((d>=1 && d<=28) && m==2)
+            {} 
+            else if(d==29 && m==2 && (y%400==0 ||(y%4==0 && y%100!=0)))
+            {} 
+            else{
+                printf("Nespravny datum\n");
+              return 0;
+            }
+        }
+        else
+        {
+            printf("Nespravny datum\n");
+          return 0;
+        }
+    }
+    else
+    {
+        printf("Nespravny datum\n");
+      return 0;
+    }
+	struct tm t = { .tm_year=y-1900, .tm_mon=m-1, .tm_mday=d };
+	t.tm_mday += 7;
+	mktime(&t);
+	if(t.tm_mday <10 && t.tm_mon+1 < 10){
+		printf(" %d.0%d.%d\n\n", t.tm_mday, t.tm_mon+1, t.tm_year+1900);
+	}	
+	else if(t.tm_mday < 10){
+		printf(" %d.%d.%d\n\n", t.tm_mday, t.tm_mon+1, t.tm_year+1900);
+	}
+	else if(t.tm_mon+1 < 10){
+		printf("%d.0%d.%d\n\n", t.tm_mday, t.tm_mon+1, t.tm_year+1900);
+	}
+	else{
+		printf("%d.%d.%d\n\n", t.tm_mday, t.tm_mon+1, t.tm_year+1900);
+	}
+
+}