PAT 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 3
0 0 255 16777215 24
24 24 0 0 24
24 0 24 24 24

Sample Output:

24

用scanf!用scanf!用scanf!

#include <iostream>
#include <cstdio>
#include <map>
#include <string>
using namespace std;
int main()
{
int n,m;
cin>>n>>m;
map<int,int> Map;
int max = -1;
int val;
for(int i = 0; i < m; i++)
{
for(int j = 0; j < n; j++)
{
int s;
scanf("%d",&s);
Map[s]++;
if(Map[s] > max)
{
max = Map[s];
val = s;
}
}
}
cout<<val<<endl;
return 0;
}