int main()
{
    int day, month, year;
    int n=10;
    int sumDays=0;
    do{
        printf("Give me day: "), scanf("%d",&day);
        printf("Give me month: "), scanf("%d",&month);
        printf("Give me year: "), scanf("%d",&year);

        if(month==2 && (year%4==0 || year%400==0) && day==29){
            break;
        }
        if((month>0 && month<=12) && (day>0 && day<=28)){
            break;
        }
        if((month>0 && month<=12 && month!=2 && month%2!=0) && (day==30)){
            break;
        }
        if((month>0 && month<=12 && month!=2 && month%2==0) && (day==31)){
            break;
        }
        printf("Not valid date try again:\n");
    }while(n==10);


    //logic
    if(month<2){
        printf("It is  %d's day of this year ", (day*month));
    }
    else{

        if(year%4==0 || year%400==0){
            if(month%2==0 && month!=2){
                sumDays=(((month/2)-1)*31)+((month/2)*30)+29;
                printf("It is  %d's day of this year ", (sumDays));
            }if(month%2!=0 && month!=2){
                sumDays=(((month/2)-1)*31)+(((month/2)+1)*30)+29;
                printf("It is  %d's day of this year ", (sumDays));
            }else{
                sumDays=31+day;
            }
        }
        else{
          if(month%2==0 && month!=2){
                sumDays=(((month/2)-1)*31)+((month/2)*30)+28;
                printf("It is  %d's day of this year ", (sumDays));
            }if(month%2!=0 && month!=2){
                sumDays=(((month/2)-1)*31)+(((month/2)+1)*30)+28;
                printf("It is  %d's day of this year ", (sumDays));
            }else{
                sumDays=31+day;
            }
        }
    }



    return 0;
}