pat 1054 The Dominant Color（20 分）

Posted 2021-01-08 getcharzp

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 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 [0,2?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

 1 #include <iostream>
 2 #include <algorithm>
 3 #include <cstdio>
 4 #include <cstring>
 5 #include <map>
 6 #include <stack>
 7 #include <vector>
 8 #include <queue>
 9 #include <set>
10 #define LL long long
11 using namespace std;
12 const int MAX = 1e7 + 1;
13 
14 int n, m, t, a, ans;
15 bool flag = false;
16 map <int, int> mp;
17 
18 int main()
19 {
20 //    freopen("Date1.txt", "r", stdin);
21     scanf("%d%d", &n, &m);
22     t = ((n * m) & 1 ? ((n * m) / 2) + 1 : ((n * m) / 2));
23     for (int i = 0; i < m; ++ i)
24         for (int j = 0; j < n; ++ j)
25         {
26             scanf("%d", &a);
27             if (flag) continue;
28             mp[a] ++;
29             if (mp[a] >= t)
30             {
31                 flag = true;
32                 ans = a;
33             }
34         }
35     printf("%d
", ans);
36     return 0;
37 }