Chessboard
Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)
Total Submission(s): 335 Accepted Submission(s): 168
Problem Description
Consider the problem of tiling an n×n chessboard by polyomino pieces that are k×1 in size; Every one of the k pieces of each polyomino tile must align exactly with one of the chessboard squares. Your task is to figure out the maximum number of chessboard squares
tiled.
Input
There are multiple test cases in the input file.
First line contain the number of cases T (T≤10000).
In the next T lines contain T cases , Each case has two integers n and k. (1≤n,k≤100)
Output
Print the maximum number of chessboard squares tiled.
Sample Input
Sample Output
Source
用 k × 1 的小矩形覆盖一个 n × n 的正方形棋盘，问正方形棋盘最多能被覆盖多少。
规律就是：如果n<k，肯定不行。
定义mod=n%k;
如果(mod<=k/2),结果为：n*n-mod*mod；
否则结果为：n*n-(k-mod)*(k-mod)；
//0MS 228K
#include<stdio.h>
int main()
{
int t,n,k;
scanf("%d",&t);
while(t--)
{
scanf("%d%d",&n,&k);
if(n<k){printf("0\n");continue;}
int mod=n%k;
if(mod<=k/2)printf("%d\n",n*n-mod*mod);
else printf("%d\n",n*n-(k-mod)*(k-mod));
}
return 0;
}
