1054. The Dominant Color (20)

Behind the scenes in the computer's memory, color is always talked about as a series of 24 bits of information for each pixel. In an image, the color with the largest proportional area is called the dominant color. A strictly dominant color takes more than half of the total area. Now given an image of resolution M by N (for example, 800x600), you are supposed to point out the strictly dominant color.

Input Specification:

Each input file contains one test case. For each case, the first line contains 2 positive numbers: M (<=800) and N (<=600) which are the resolutions of the image. Then N lines follow, each contains M digital colors in the range [0, 2²⁴). It is guaranteed that the strictly dominant color exists for each input image. All the numbers in a line are separated by a space.

Output Specification:

For each test case, simply print the dominant color in a line.

Sample Input:

5 30 0 255 16777215 2424 24 0 0 2424 0 24 24 24

Sample Output:

24

-----------------华丽的分割线------------------------

分析：对每一个输入进行存取，当发现超过半数时就可以break出去了。

代码：

#include<cstdio>#include<cstdlib>#define Maxn 20000000int countmax[Maxn];int main(void){int M,N;scanf("%d %d",&M,&N);int total = M*N;int mid = total/2;int input,max;for(int i=0;i<total;++i){scanf("%d",&input);if(++countmax[input] > mid){max = input;}}printf("%d",max);system("pause");return 0;}