Are you out of your mind ?, you have created 3 posts for three different problem without giving any sort of explanation of the approraches you tried? **STOP SPAMMING THRE FORUM**

Plz reply politely if u know. Don’t get freaked.Stop giving lessons .If you know gently reply. I’m not forcing you to reply. And stop behaving like an idiot.

What wrong did he say? Creating three different random threads at same time without any context is spamming.

I guess you are supposed to use two pointers. First, sort the Array A in non decreasing order. Then, create an array of tuples, `(value,index)`

for every element in B. Then sort the array based on value. Now, initialise two pointers `i,j = 0,0`

; where `i`

runs from `0`

to `length(A)`

, and `j`

runs from `0`

to `length(B)`

. Now, for each `j`

, increment `i`

until `A[i]<=B[j]`

, and after condition fails, note the index `i`

and increment `j`

.

```
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <string.h>
typedef struct tuple
{
int value;
int index;
int count;
}tuple;
int ascending(const void *a, const void *b)
{
return *(int *)a - *(int *)b;
}
int sort_based_on_value(const void *a, const void *b)
{
tuple *x, *y;
x = (tuple *)a;
y = (tuple *)b;
return x->value-y->value;
}
int sort_based_on_index(const void *a, const void *b)
{
tuple *x, *y;
x = (tuple *)a;
y = (tuple *)b;
return x->index-y->index;
}
int main()
{
int n;
scanf("%d",&n);
int *a = (int *)malloc(sizeof(int)*n);
for(int i=0;i<n;i++)
scanf("%d",&a[i]);
qsort(a,n,sizeof(int),ascending);
int m;
scanf("%d",&m);
tuple * b = (tuple *)malloc(sizeof(tuple)*m);
for(int i=0;i<m;i++)
{
scanf("%d",&b[i].value);
b[i].index = i;
}
qsort(b,m,sizeof(tuple),sort_based_on_value);
int i=0;
for(int j=0;j<m;j++)
{
while(i<n && a[i]<=b[j].value)
i++;
b[j].count = i;
}
qsort(b,m,sizeof(tuple),sort_based_on_index);
for(int j=0;j<m;j++)
printf("%d\n",b[j].count);
return 0;
}
```

Here’s an O(M+N) solution.

Edit: The Time Complexity is O(max(m,n) * log(max(m,n))).

Thanks:)

And you better follow the norms and maintain the decorum of the forum.

Yes I will , but mind your words.

Well, what wrong did I say anyways, even the moderator himself is backing my words