CHECHOC - Editorial

editorial
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102

I wanna cry so bad rn

104

Because the question was intended for brute force to pass here.

105

void solve()
{
//Code here;
int n, m, x, y;

cin >> n >> m >> x >> y;

int a[n + 1][m + 1];
for (int i = 1; i <= n; i++)
{

	if (y >= x)
	{

		if (i & 1)
		{
			for (int j = 1; j <= m; j++)
			{
				a[i][j] = x;
				int d = (y - x);

				if (d > x)
				{
					a[i][j + 1] = x;
				} else
				{
					a[i][j + 1] = d;
				}

				j++;
			}
		} else
		{
			for (int j = 1; j <= m; j++)
			{
				int f = (y - x);

				if (f < x)
				{

					a[i][j] = f;
				} else
				{
					a[i][j] = x;
				}
				a[i][j + 1] = x;
				j++;
			}
		}
	} else
	{
		if (i & 1)
		{
			for (int j = 1; j <= m; j++)
			{
				a[i][j] = y;
				a[i][j + 1] = 0;
				j++;
			}
		} else
		{
			for (int j = 1; j <= m; j++)
			{
				a[i][j] = 0;
				a[i][j + 1] = y;
				j++;
			}
		}
	}


}

for (int i = 1; i <= n; i++)
{
	for (int j = 1; j <= m; j++)
	{
		cout << a[i][j] << " ";
	}
	cout << endl;
}
int tot = 0;
for (int i = 1; i <= n; i++)
{
	for (int j = 1; j <= m; j++)
	{
		tot += a[i][j];
	}
}

cout << tot << endl;

}
can anyone say where is my wrong? Here the 1x 1 ans also coming write but know why wa is coming?

106

your concept is not right if take the pattern as
5 0 5
0 5 0
5 0 5
then obviously it will give 25
so always take ma(y,x) and if (y>x) then only take x and (y-x)

107

@nandansharma1 The error is that in not accepted code for n*m==1 you have written cout<<min(x,y) which will return y when x is greater
but since it has no adjacent element so the second requirement is worthless in this test case i.e when n=m=1

108

@yashsri421 In line 35 you are doing 2 * n * m * x whereas it should be n * m * x

109

This will go out of the bounds of the matrix .
eg - suppose at some iteration, j=4 and m=4 so it will enter the while loop but the line a[i][j+1] will be a[i][5+1] which exceeds the size of array.

110

can anyone please tell me what is wrong with this please…?
https://www.codechef.com/viewsolution/35999059

111

@aditya04848 one of the most obvious case that failed n=1,m=1 and x<y answer should be x and not y

1 Like
113

base case cost me o god this time i might have reached 4 star.

114

Hi.
Can someone plz tell me the test case where my code is giving the wrong ouput
heres my submission
https://www.codechef.com/viewsolution/35965722

I am assigning max values matrix can have and then I am summing all the elements of matrix

115

any counter test case for this please.

https://www.codechef.com/viewsolution/36024987

117

Hey can you please point the error in this code I literally have no clue PLZ help.
https://www.codechef.com/viewsolution/36025013

118

This gay solution will give wrong answer when matrix is a square matrix like 33 or 44 but he got AC. Can any one explain how?

119

https://www.codechef.com/viewsolution/35981280
i had everything cool while i was going for a dry run, but ended up getting a WA. Pls can someone help me with this code

120

@omhari I think that is a big blunder mannnn

122

@iit_yt_28 One of the error you are not using endl if n==1 and m==1

1 Like
123

Jako Rakhe Sayian maar sake na koi… cannot be justified better than this.

1 Like
124

Thank you so much bro…

1 Like
125

@iiy_yt_28 that is why people say that debugging your own code is some time a hell lot of task

1 Like