PAT 甲级 1054 The Dominant Color （20 分）

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, 800×600), 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 [0,2?24??). 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 3
0 0 255 16777215 24
24 24 0 0 24
24 0 24 24 24

Sample Output:

24

 1 #include<iostream>
 2 
 3 using namespace std;
 4 
 5 int main()
 6 {
 7   int M,N,color = -1,num = 1,temp;
 8   
 9   cin>>M>>N;
10   
11   int motal = M*N;
12   
13   for(int i=0;i<motal;++i)
14   {
15     cin>>temp;
16     
17     if(color != temp && num > 1)
18     {
19       color = temp;
20       --num;
21     }
22     else if(color != temp && num == 1)
23       color = temp;
24     else
25       ++num;
26   }
27   
28   cout<<color<<endl;
29   
30   return 0;
31 }