Solution UVa: 13025 - Back to the Past

Link Problem: https://onlinejudge.org/external/130/13025.pdf 

My Submissions

#		Problem	Verdict	Language	Run Time	Submission Date
27675120	13025	Back to the Past	Accepted	C++11	0.000	2022-07-24 10:11:26

#include<bits/stdc++.h>

using namespace std;

string StringByIndex(int index){

if (index== 2) return "Monday";

if (index== 3) return "Tuesday";

if (index== 4) return "Wednesday";

if (index== 5) return "Thursday";

if (index== 6) return "Friday";

if (index== 7) return "Saturday";

if (index== 8) return "Sunday";

}

string NameMonth(int monthPast){

if (monthPast== 1) return "January";

if (monthPast== 2) return "February";

if (monthPast== 3) return "March";

if (monthPast== 4) return "April";

if (monthPast== 5) return "May";

if (monthPast== 6) return "June";

if (monthPast== 7) return "July";

if (monthPast== 8) return "August";

if (monthPast==9) return "September";

if (monthPast==10) return "October";

if (monthPast==11) return "November";

if (monthPast==12) return "December";

}

string TheNameOfWeekDay(int index, int dayNow, int monthNow, int yearNow, int dayPast, int monthPast, int yearPast){

bool leapYear= (yearNow%4==0 && yearNow%100!=0);

while (dayNow != dayPast && monthNow != monthPast && yearNow != yearPast){

dayNow--;

index--;

if (index==1) index= 8;

if (dayNow == 0){

monthNow--;

if (monthNow==0){

yearNow--;

leapYear= (yearNow%4==0 && yearNow%100!=0);

monthNow= 12;

dayNow=31;

}

if (monthNow==1 || monthNow==3 ||monthNow==5||monthNow==7 ||monthNow==8 ||monthNow==10 ||monthNow==12){

dayNow= 31;

}

else

if (monthNow == 2){

if (leapYear) dayNow=29;

else dayNow=28;

}

else dayNow=30;

}

}

return NameMonth(monthPast)+" "+to_string(dayPast)+", "+to_string(yearPast)+" "+ StringByIndex(index);

}

int main(){

int index= 8; //The name day of week day now : Sunday

int dayNow= 24;

int monthNow= 7;

int yearNow= 2022;

int dayPast= 29;

int monthPast= 5;

int yearPast= 2013; 

cout<<TheNameOfWeekDay(index, dayNow, monthNow, yearNow, dayPast, monthPast, yearPast)<<"\n";

}