10074  Take the Land
Moderator: Board moderators
Re: uva 10074: Take the Land WA
Correct your output code to printf("%d\n", maxSubRectz);
and you have errors in your code.
and you have errors in your code.
Re: uva 10074: Take the Land WA
@aybek
Sorry for the late reply.
I have tried printing that way too but i still receive a WA. I have updated the code. It compiles without errors (g++ compiler) and runs well on several test cases i provide on my computer. So if there are any errors pls be kind and notify them.
Thankx
Sorry for the late reply.
I have tried printing that way too but i still receive a WA. I have updated the code. It compiles without errors (g++ compiler) and runs well on several test cases i provide on my computer. So if there are any errors pls be kind and notify them.
Thankx
Re: uva 10074: Take the Land WA
jishnu1, I don't know what test case will break your solution, I can give you my code of solution,
and you might generate outputs from it and compare them with your solution outs.
and you might generate outputs from it and compare them with your solution outs.
Code: Select all
#include <iostream>
using namespace std;
int M, N;
int a[ 101 ][ 101 ];
int s[ 101 ][ 101 ];
void count_s() {
int i, j;
s[1][1] = a[1][1];
for ( i = 2; i <= M; ++i )
s[i][1] = s[i1][1] + a[i][1];
for ( j = 2; j <= N; ++j )
s[1][j] = s[1][j1] + a[1][j];
for ( i = 2; i <= M; ++i )
for ( j = 2; j <= N; ++j )
s[i][j] = s[i][j1] + s[i1][j]  s[i1][j1] + a[i][j];
}
int main() {
int i, j, x1, y1, x2, y2, max_area;
for ( ;; ) {
cin >> M >> N;
if ( !M && !N ) break;
max_area = 0;
for ( i = 1; i <= M; ++i )
for ( j = 1; j <= N; ++j )
cin >> a[i][j];
count_s();
for ( x1 = 1; x1 <= M; ++x1 )
for ( y1 = 1; y1 <= N; ++y1 )
for ( x2 = x1; x2 <= M; ++x2 )
for ( y2 = y1; y2 <= N; ++y2 )
if ( (s[x2][y2]  s[x11][y2]  s[x2][y11] + s[x11][y11]) == 0 ) {
max_area = max( (x2x1+1)*(y2y1+1), max_area );
}
cout << max_area << endl;
}
return 0;
}

 Guru
 Posts: 5947
 Joined: Thu Sep 01, 2011 9:09 am
 Location: San Jose, CA, USA
Re: uva 10074: Take the Land WA
jishnu1, change line 24 to:
if (i > 0) { A[j] += A[j] ; B[j] += B[i1][j]; }
And line 30 to:
if (j > 0) { A[j] += A[j1] ; B[j] += B[j1]; }
And line 36 to:
if (i > 0 && j > 0) { A[j] = A[j]  A[i1][j1] ; B[j] = B[i][j]  B[i1][j1]; }
if (i > 0) { A[j] += A[j] ; B[j] += B[i1][j]; }
And line 30 to:
if (j > 0) { A[j] += A[j1] ; B[j] += B[j1]; }
And line 36 to:
if (i > 0 && j > 0) { A[j] = A[j]  A[i1][j1] ; B[j] = B[i][j]  B[i1][j1]; }
Check input and AC output for thousands of problems on uDebug!
Re: uva 10074: Take the Land WA
@brianfry713
Thankx, I finally got Accepted , but i did not quite understand the logic behind this , in a conditional statement like if isnt it true that u can put the assignment operations on one line if possible ?
if this is not the case isn't the judge supposed to report compilation error, and if my algorithm was coded the wrong way how was it able to pass several test cases?
My question is :
why:
instead of this :
Thankx, I finally got Accepted , but i did not quite understand the logic behind this , in a conditional statement like if isnt it true that u can put the assignment operations on one line if possible ?
if this is not the case isn't the judge supposed to report compilation error, and if my algorithm was coded the wrong way how was it able to pass several test cases?
My question is :
why:
Code: Select all
if (i > 0) {A[i][j] += A[i  1][j] ; B[i][j] += B[i1][j];}
Code: Select all
if (i > 0) A[i][j] += A[i  1][j] ; B[i][j] += B[i1][j];

 Guru
 Posts: 5947
 Joined: Thu Sep 01, 2011 9:09 am
 Location: San Jose, CA, USA
Re: uva 10074: Take the Land WA
No those code blocks are not equivalent. C is flexible with whitespace, it doesn't matter if the statements are on one line or not.
is the same as:
You could use a , instead of ; if you wanted to write them without braces.
is the same as:
You should change your coding style with whitespace, as it makes it more clear.
Code: Select all
if(cond)
statement1; statement2;
Code: Select all
if(cond)
statement1;
statement2;
Code: Select all
if(cond)
statement1, statement2;
Code: Select all
if(cond) {
statement1;
statement2;
}
Check input and AC output for thousands of problems on uDebug!

 New poster
 Posts: 5
 Joined: Tue May 26, 2015 9:55 am
Re: 10074  Take the Land
hello. i keep getting wrong answer. I tried many random testcases and compared my outputs with the ones on udebug. they are equal. my code is here  http://ideone.com/dOLTFy
I have applied 1D maximum sum on a matrix. For every window of rows I try to find the starting and ending column.
For finding the window of columns, I save the starting and ending column indices which give me the maximum sum on the temporary array.
This runs is O(n^3)
I have applied 1D maximum sum on a matrix. For every window of rows I try to find the starting and ending column.
For finding the window of columns, I save the starting and ending column indices which give me the maximum sum on the temporary array.
This runs is O(n^3)