diff --git a/program b/program
index ee31e67..b7269c1 100755
Binary files a/program and b/program differ
diff --git a/program.c b/program.c
index 817bd72..d266bfb 100644
--- a/program.c
+++ b/program.c
@@ -2,15 +2,34 @@
 #include <time.h>
 
 int main()
-{        
-    /* initialize */
-    int y=0, m=0, d=0;    
-    fgets("%d.%d.%d", &d, &m, &y);
-    struct tm t = { .tm_year=y-1900, .tm_mon=m-1, .tm_mday=d };
-    /* modify */
-    t.tm_mday += 40;
-    mktime(&t);
-    /* show result */
-    printf("%s", asctime(&t)); /* prints: Sun Mar 16 00:00:00 1980 */
-    return 0;
+{
+        int d = 0;
+        int m = 0;
+        int y = 0;
+        scanf("%d.%d.%d", &d, &m, &y);
+    
+        //check date validness
+        if(!(m>=1 && m<=12) && !(y>=0 && y<=9999) && !(((d>=1 && d<=31) && (m==1 || m==3 || m==5 || m==7 || m==8 || m==10 || m==12)) || ((d>=1 && d<=30) && m==4 || m==6 || m==9 || m==11) ||(d==29 && m==2 && (y%400==0 ||(y%4==0 && y%100!=0))) || ((d>=1 && d<=28) && m==2))){
+                puts("Nespravny datum\n");
+                return 0;
+        }
+        //setting date
+        struct tm t = { .tm_year=y-1900, .tm_mon=m-1, .tm_mday=d };
+        //adding week to the date
+        t.tm_mday += 7;
+        mktime(&t);
+
+        //output data
+        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 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{
+                printf("%d.%d.%d\n\n", t.tm_mday, t.tm_mon+1, t.tm_year+1900);
+        }
+
 }