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

源码：

#include<bits/stdc++.h>
#include<stdio.h>
using namespace std;
map<int,int> mp;
int main()
{
    int m,n;cin>>m>>n;
    for(int i=0;i<n;i++)
    {
        for(int j=0;j<m;j++)
        {
            int t;
            scanf("%d",&t);
            mp[t]++;
            if(mp[t]>m*n/2.0)
                cout<<t<<endl;
        }
    }
}