I found a lot more than 5 errors here. When I got my output to match the expected output but it still got marked the wrong answer, I knew something was up. I copied the code to my own Idle editor in python and tried to run it there. The most glaring problem is the given code violates python's name space rules. The storeMonth() function doesn't return that list of months to the calling function; hence, month is undefined in the calling function. According to the instructions adding and removing lines is not allowed, though. Ok... So, I made the necesarry adjustments to get it to run in Idle, corrected 5 typoes and got it to return the correct answer. Phew. Debugging someone else's code is never fun, but when the target I'm aiming for needs to include python syntax errors, that's crazy!

can anyone explain this? i dont understand....

include

using namespace std;

int month[13];

void updateLeapYear(int year) { if(year % 400 == 0) { month[2] = 29; } else if(year % 100 == 0) { month[2] = 28; } else if(year % 4 == 0) { month[2] = 29; } else { month[2] = 28; } }

void storeMonth() { month[1] = 31; month[2] = 28; month[3] = 31; month[4] = 30; month[5] = 31; month[6] = 30; month[7] = 31; month[8] = 31; month[9] = 30; month[10] = 31; month[11] = 30; month[12] = 31; }

int findLuckyDates(int d1, int m1, int y1, int d2, int m2, int y2) { storeMonth(); int result = 0; while(true) { int x = d1; x = x * 100 + m1; x = x * 10000 + y1; if(x % 4 == 0 || x % 7 == 0) { result++; } if(d1 == d2 && m1 == m2 && y1 == y2) { break; } updateLeapYear(y1); d1++; if(d1 > month[m1]) { d1 = 1; m1++; if(m1 > 12) { m1 = 1; y1++; } } } return result; }

int main() { string str; int d1, m1, y1, d2, m2, y2; getline(cin, str); for(int i = 0; i < str.size(); i++) { if(str[i] == '-') { str[i] = ' '; } } stringstream ss; ss << str; ss >> d1 >> m1 >> y1 >> d2 >> m2 >> y2; int result = findLuckyDates(d1, m1, y1, d2, m2, y2); cout << result << endl; } Test cases are still failing.

this is java solution , i have commented on which line we have to do the changes and what we have to change

public class Main {

public static int month[];

public static void main (String[] args) throws java.lang.Exception {
    Scanner in  = new Scanner(System.in);

    month = new int[15];

    String s = in.nextLine();

    StringTokenizer str = new StringTokenizer(s, "- ");

    int d1 = Integer.parseInt(str.nextToken());
    int m1 = Integer.parseInt(str.nextToken());
    int y1 = Integer.parseInt(str.nextToken());
    int d2 = Integer.parseInt(str.nextToken());
    int m2 = Integer.parseInt(str.nextToken());
    int y2 = Integer.parseInt(str.nextToken());

    int result = findPrimeDates(d1, m1, y1, d2, m2, y2);
    System.out.println(result);

}

public static void updateLeapYear(int year) {
    if(year % 400 == 0) {
        month[2] = 29;                                                     //1
    } else if(year % 100 == 0) {
        month[2] = 28;                                                      //2
    } else if(year % 4 == 0) {
        month[2] = 29;
    } else {
        month[2] = 28;
    }
}

public static void storeMonth() {
    month[1] = 31;
    month[2] = 28;
    month[3] = 31;
    month[4] = 30;
    month[5] = 31;
    month[6] = 30;
    month[7] = 31;
    month[8] = 31;
    month[9] = 30;
    month[10] = 31;
    month[11] = 30;
    month[12] = 31;
}

public static int findPrimeDates(int d1, int m1, int y1, int d2, int m2, int y2) { storeMonth();

    int result = 0;

    while(true) {
        int x = d1;
        x = x * 100 + m1;
        x = x * 10000 + y1;                                                         //3
        if(x % 4 == 0 || x % 7 == 0) {                                          //4
            result = result + 1;
        }
        if(d1 == d2 && m1 == m2 && y1 == y2) {
            break;
        }
        updateLeapYear(y1);
        d1 = d1 + 1;
        if(d1 > month[m1]) {
            m1 = m1 + 1;
            d1 = 1;
            if(m1 > 12) {
                y1 =  y1 + 1;
                m1 = 1;                                                   //5
            }


        }
    }
    return result;
}

}

Hint: Mistakes are present in 5 places only. Count the changes you make while correcting the logic. The change count must be exactly 5 and not more. Don't correct the full code based on your logic because it will make the test case fail.