PTA 1054 The Dominant Color (20 分)

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题目

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
结尾无空行
Sample Output:
24
结尾无空行

解题思路

数组排序,然后找中间值

M, N = map(int,input().split())
# M, N = map(int,"5 3".split())
inputList = []
# from collections import defaultdict
# resDict = defaultdict(int)
for _ in range(N):
    eachInput = list(map(int, input().split()))
    # eachInput = list(map(int, "24 24 0 0 24".split()))
    # for i in eachInput:
    #     resDict[i] += 1
        # inputList.append(i)
    inputList += eachInput

# from collections import Counter
# counter = Counter(inputList).most_common(1)
# print(resDict)
# counter = Counter(resDict).most_common(1)
length = len(inputList)
inputList.sort()
print(inputList[length//2])
# print(counter[0][0])