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, 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 [0,224). 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

Use map Container count . 

#include <iostream>
#include <map>
#include <string>
using namespace std;
map<string, int>p;

int main() {
	int m, n;
	string x;
	cin >> m >> n;
	for (int i = 0; i < n; i++) {
		for (int j = 0; j < m; j++) {
			cin >> x;
			p[x]++;
		}
	}
	for (map<string, int>::iterator it = p.begin(); it != p.end(); it++) {
		if (it->second > (m * n / 2)) {
			cout << it->first;
			break;
		}
	}
	return 0;
}