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 24Sample Output:
24
c++代码:
#include<bits/stdc++.h> using namespace std; int main(){ int M,N; scanf("%d%d",&M,&N); unordered_map<int,int>m; for(int i=0;i<M*N;++i){ int a; scanf("%d",&a); ++m[a]; } for(auto i=m.cbegin();i!=m.cend();++i) if(i->second*2>M*N){ printf("%d",i->first); return 0; } return 0; }