1054. The Dominant Color

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.

#include <stdio.h>
#include <stdlib.h>
#include <map>
using namespace std;

int main ()
{
    map<int,int> mp;
    int i,j,m,n,temp;
    scanf("%d %d",&m,&n);
    for( i=0;i<n;i++)
    {
         for( j=0;j<m;j++)
         {
              scanf("%d",&temp);
              if( mp.find(temp)!=mp.end()) mp[temp]++;
              else mp[temp]=1;
              }
         }
    int k=m*n/2;
    for( map<int,int>::iterator it=mp.begin();it!=mp.end();it++)
    {
         if( it->second>k)
         {
             printf("%d\n",it->second);
             return 0;
             }
             }
    system("pause");
    return 0;   
    }

1054. The Dominant Color

原文：http://blog.csdn.net/lchinam/article/details/44100429