If we have an array of Interger values, find out a sub array
which has a maximum value of the array and start and end
positions of the array..The sub array must be contiguious.
Take the start add to be 4000.
For Ex if we have an array arr[] =
{-1,-2,-5,9,4,3,-6,8,7,6,5,-3}
here the sub array of max would be
{8,7,6,5} coz the sum of max contiguous array is 8+7+6+5 =
26.The start and end position is 4014(8) and 4020(5).
Answers were Sorted based on User's Feedback
Answer / monica
Well this is not an answer to the question but the solution
given in the example is wrong. Wont the subarray that gives
the max sum be {9,4,3,-6,8,7,6,5} whose sum is 36???
Is This Answer Correct ? | 8 Yes | 0 No |
Answer / sowmya
# include<stdio.h>
int main()
{
int i,j,k,sum[30],l,z =0,num = 0,sub,len;
int a[30],index[15][15],temp;
sum[z] = 0;
printf("\n Enter the Max.no. of elements to be
entered in the array :\n");
scanf("%d",&len);
printf("\n Enter the array Values : \n");
for(i=0;i<len;i++)
scanf("%d",&a[i]);
for(i = 0;i <len;i++)
{
k = len/2;
l = i+k;
for(j=i;j<l;j++)
if(j<len)
{
num++;
}
if(num == k)
{
for(j =i;j<l;j++)
{
if(j<len)
sum[z] = sum[z]+a[j];
else printf("\n num <3!");
}
z++;
sum[z] = 0;
}
num = 0;
}
j = 0;
for(i = 0 ;i <z;i++)
{
printf(" sum[%d] = %d\n",i,sum[i]);
index[j][i] = sum[i];
}
for(i = 0;i<z;i++)
{
for(j = i+1;j<z;j++)
if(sum[i] < sum[j])
{
temp = sum[i];
sum[i] = sum[j];
sum[j] = temp;
}
}
j= 0;
for(i = 0;i<z;i++)
if(index[j][i] == sum[0])
sub = i;
printf(" Sub array of max. sum = { ");
for(i = sub;i<sub+k;i++)
printf(" %d ",a[i]);
printf("}");
return 0;
}
Is This Answer Correct ? | 2 Yes | 2 No |
Answer / manoj
Another approach
# include<stdio.h>
struct index {
int sum;
int start;
int end;
};
int main()
{
struct index sumidx[30],*tmp;
int i,j,z =0,len;
int a[30];
printf("\n Enter the Number of elements to be entered
in the array :\n");
scanf("%d",&len);
printf("\n Enter the array Values : \n");
for(i=0;i<len;i++)
scanf("%d",&a[i]);
for(i = 0;i <len - 1;i++)
{
sumidx[z].sum = a[i];
sumidx[z].start = i;
sumidx[z].end = i;
for(j=i+1;j<len;j++)
if(sumidx[z].sum < (sumidx[z].sum + a[j]))
{
sumidx[z].sum = sumidx[z].sum + a[j];
sumidx[z].start = i;
sumidx[z].end = j;
}
else
break;
z++;
}
tmp = sumidx;
for(i = 0;i<z;i++)
{
if(sumidx[i].start != sumidx[i].end)
if(tmp->sum < sumidx[i].sum)
tmp = sumidx+i;
}
printf("\n sum = %d start = %d end
%d\n",tmp->sum,tmp->start,tmp->end);
return 0;
}
Is This Answer Correct ? | 2 Yes | 2 No |
Answer / vadivelt
Hi All,
I hope the code which i have written ll give the exact
answer
Note: Compiler used is visual Studio 2005
Eg: if the the no of elemet is 12 and the elements are -1,-
2,5,6,-4,7,8,9,-3,10,20,-4 then output(sub array) should
contain the elements 10
and 20.
#include<stdio.h>
#include<conio.h>
int MakeSubArray(int *ptr, int size);
main()
{
int array[100];
int subarray[10], Index, no, j, k;
printf("ENTER NO OF ELEMENTS IN THE MAIN ARRAY \n");
scanf("%d", &no);
printf("\nENTER THE ELEMENTS\n");
for(j = 0; j<no; j++)
{
scanf("%d", &array[j]);
}
Index = MakeSubArray(&array[0],no);
printf("\nSTART POSITION\n%d", &array[Index]);
printf("\n\nSUB ARRAY ELEMENT(S) \n");
for(j = Index, k = 0; (array[j] >= 0) && (j < no);
j++, k++)
{
subarray[k] = array[j];
printf("%d ", subarray[k]);
}
printf("\n\nEND POSITION\n%d", &array[j-1]);
getch();
}
int MakeSubArray(int *ptr, int size)
{
int i, flag = 0, sum = 0, sum1 = 0, index = 0,
index1;
if(ptr != '\0' && size > 0)
{
for(i = 0; i <size; i++)
{
if(ptr[i] >= 0)
{
if(flag == 0)
{
index = i;
}
sum = sum + ptr[i];
flag++;
}
else
{
if(flag > 0 && sum1 < sum)
{
index1 = index;
sum1 = sum;
}
sum = 0;
flag = 0;
}
}
/*If the last element is non zero and it is part of
sub array then this condition is useful*/
if(flag > 0 && sum1 < sum)
{
index1 = index;
}
}
return index1;
}
Is This Answer Correct ? | 1 Yes | 1 No |
Answer / kyle
Here's another way...
Btw this way gets the correct answer of {9,4,3,-6,8,7,6,5}
with a sum of 36.
#include <stdio.h>
#include <stdlib.h>
#ifndef NULL
#define NULL 0
#endif
struct index {
int start;
int finish;
int sum;
};
int main()
{
// Init and setup variables
struct index max; // Max values
struct index cur; // Current values
int avg = 0; // Average values
int len = 0; // Array length
int* a = NULL; // The array
int i;
//Get values
printf("Enter the number of variables in the array:");
scanf("%d", &len);
array = malloc(len*sizeof(int));
if( array == NULL )
{
printf("Error: Out of memory");
return 0;
}
for(i=0; i<len; ++i)
{
scanf("%d",&a[i]);
avg += a[i];
}
avg /= len; // Compute average
max.start = max.finish = 0;
max.sum = a[0];
for(i=0; i<len && max.finish != len; ++i)
{
cur.start = cur.finish = i;
cur.sum = a[i];
while( cur.sum > avg && cur.finish < len )
{
if( cur.sum > max.sum )
{
max.start = cur.start;
max.finish = cur.finish;
max.sum = cur.sum;
}
++cur.finish;
if( cur.finish < len )
cur.sum += a[cur.finish];
}
}
printf("\n Max sum = %d, start = %d, finish = %d\n",
max.sum, max.start, max.end);
return 0;
}
Is This Answer Correct ? | 1 Yes | 2 No |
What are the 4 data types?
If we give two names then this displays the connection between the two people. It is nothing but flames game
what is associativity explain what is the precidence for * and & , * and ++ how the folloing declaration work 1) *&p; 2) *p++;
how can you print&scan anything using just one character? :) HINT: printf,scanf similer
Write a program to produce the following output in c language? 1 1 1 1 2 1 1 3 3 1 1 4 6 4 1
Write a program in "C" to calculate the root of a quadratic equation ax^2+bx+c=0, where the value of a,b & c are known.
9.how do you write a function that takes a variable number of arguments? What is the prototype of printf () function? 10.How do you access command-line arguments? 11.what does ‘#include<stdio.h>’ mean? 12.what is the difference between #include<> and #include”…”? 13.what are # pragma staments? 14.what is the most appropriate way to write a multi-statement macro?
a c code by using memory allocation for add ,multiply of sprase matrixes
What is indirection? How many levels of pointers can you have?
how to find the size of the data type like int,float without using the sizeof operator?
How can I invoke another program from within a C program?
Write a c program to demonstrate character and string constants?