1054 The Dominant Color (20)（20 分）

Posted 2020-11-14 wanghao-boke

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, 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

#include<cstdio>
int main(){
    int m,n,col,ans= -1,count = 0;
    scanf("%d%d",&m,&n);
    for(int i = 0; i < m; i++){
        for(int i = 0; i < n; i++){
            scanf("%d",&col);
            if(count == 0){
                ans = col;
                count = 1;
            }
            else{
                if(ans  == col) count++;
                else count--;
            }
        }
    }
    printf("%d",ans);
    return 0;
}

 

#include<cstdio>
#include<map>
using namespace std;
int main(){
    int n,m,col;
    map<int,int> count;
    scanf("%d%d",&m,&n);
    for(int i = 0; i < m; i++){
        for(int j= 0; j < n; j++){
            scanf("%d",&col);
            if(count.find(col)!=count.end()) count[col]++;
            else count[col] = 1;
        }
    }
    int k = 0, max = 0;
    for(map<int,int>::iterator it=count.begin(); it != count.end(); it++){
        if(it -> second  > max){
            k = it -> first;
            max = it -> second;
        }
    }
    printf("%d",k);
    return 0;
}