PAT 甲级 1054 The Dominant Color (20 分)（简单题）

1054 The Dominant Color (20 分)

 

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 Mby N (for example, 8), 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 (≤) and N (≤) which are the resolutions of the image. Then N lines follow, each contains M digital colors in the range [0). 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

题意：

数数哪个颜色过半

AC代码:

#include<iostream>
#include<stack>
#include<queue>
#include<cmath>
#include<algorithm>
#include<vector>
#include<string>
#include<cstring>
#include<algorithm>
using namespace std;
int a[99999999];
int main(){
    int n,m;
    cin>>n>>m;
    int last=-1;
    for(int i=1;i<=m;i++){
        for(int j=1;j<=n;j++){
            int x;
            cin>>x;
            a[x]++;
            if(a[x]>n*m/2){
                last=x;
            }

        }
    }
    cout<<last;
    return 0;
}