PAT-A-1054. The Dominant Color (20)

1054. The Dominant Color (20)

时间限制

100 ms

内存限制

65536 kB

代码长度限制

16000 B

判题程序

Standard

作者

CHEN, Yue

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 30 0 255 16777215 2424 24 0 0 2424 0 24 24 24

Sample Output:

24

#include<iostream>#include<cstdio>#include<map>using namespace std;int main(){  int n, m;  map<int, int> mp;  cin >> n >> m;  int num;  for (int i = 0; i < n*m; i++)  {    cin >> num;    if (mp.find(num) != mp.end())      mp[num]++;    else      mp[num] = 1;  }  int max = 0;  int k;  for (map<int, int>::iterator it = mp.begin(); it != mp.end(); it++)  {    if (it->second > max)    {      k = it->first;      max = it->second;    }  }  cout << k << endl;  system("pause");  return 0;}