Given sum of row size & column size, Determine the maximum number of values that can be stored?

Given K, the sum of row size & column  size of the matrix, compute the maximum number of values that can be stored.


For Example: 
If K=5, You have to find the row and column size
row = 3, column = 2
So, Maximum number of values that can be stored = 6

If K=6,
row can be '3' & column can be '3'
So, output = 9

If K=7
row can be '4' & column can be '3'
So, output = 12



Implementation:

#include <stdio.h> #include <string.h> #include <math.h> #include <stdlib.h> int main() { int T; unsigned long long int K,hor,ver; scanf("%d",&T); while(T--) { scanf("%llu",&K); hor=K/2; ver=K-hor; printf("%llu\n",(hor*ver)); } return 0; }